!> @synthetic_turbulence_generator_mod.f90 !------------------------------------------------------------------------------! ! This file is part of the PALM model system. ! ! PALM is free software: you can redistribute it and/or modify it under the ! terms of the GNU General Public License as published by the Free Software ! Foundation, either version 3 of the License, or (at your option) any later ! version. ! ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. ! ! You should have received a copy of the GNU General Public License along with ! PALM. If not, see . ! ! Copyright 2017-2020 Leibniz Universitaet Hannover !------------------------------------------------------------------------------! ! ! Current revisions: ! ----------------- ! ! ! Former revisions: ! ----------------- ! $Id: synthetic_turbulence_generator_mod.f90 4495 2020-04-13 20:11:20Z suehring $ ! restart data handling with MPI-IO added ! ! 4481 2020-03-31 18:55:54Z maronga ! bugfix: cpp-directives for serial mode added, dummy statements to prevent compile errors added ! ! 4442 2020-03-04 19:21:13Z suehring ! Set back turbulent length scale to 8 x grid spacing in the parametrized mode ! (was accidantly changed). ! ! 4441 2020-03-04 19:20:35Z suehring ! Correct misplaced preprocessor directive ! ! 4438 2020-03-03 20:49:28Z suehring ! Performance optimizations in velocity-seed calculation: ! - random number array is only defined and computed locally (except for ! normalization to zero mean and unit variance) ! - parallel random number generator is applied independent on the 2D random ! numbers in other routines ! - option to decide wheter velocity seeds are computed locally without any ! further communication or are computed by all processes along the ! communicator ! ! 4346 2019-12-18 11:55:56Z motisi ! Introduction of wall_flags_total_0, which currently sets bits based on static ! topography information used in wall_flags_static_0 ! ! 4335 2019-12-12 16:39:05Z suehring ! Commentation of last commit ! ! 4332 2019-12-10 19:44:12Z suehring ! Limit initial velocity seeds in restart runs, if not the seed calculation ! may become unstable. Further, minor bugfix in initial velocity seed ! calculation. ! ! 4329 2019-12-10 15:46:36Z motisi ! Renamed wall_flags_0 to wall_flags_static_0 ! ! 4309 2019-11-26 18:49:59Z suehring ! Computation of velocity seeds optimized. This implies that random numbers ! are computed now using the parallel random number generator. Random numbers ! are now only computed and normalized locally, while distributed over all ! mpi ranks afterwards, instead of computing random numbers on a global array. ! Further, the number of calls for the time-consuming velocity-seed generation ! is reduced - now the left and right, as well as the north and south boundary ! share the same velocity-seed matrices. ! ! 4182 2019-08-22 15:20:23Z scharf ! Corrected "Former revisions" section ! ! 4148 2019-08-08 11:26:00Z suehring ! Remove unused variable ! ! 4144 2019-08-06 09:11:47Z raasch ! relational operators .EQ., .NE., etc. replaced by ==, /=, etc. ! ! 4071 2019-07-03 20:02:00Z suehring ! Bugfix, initialize mean_inflow_profiles in case turbulence and inflow ! information is not read from file. ! ! 4022 2019-06-12 11:52:39Z suehring ! Several bugfixes and improvements ! - revise bias correction of the imposed perturbations (correction via volume ! flow can create instabilities in case the mean volume flow is close to zero) ! - introduce lower limits in calculation of coefficient matrix, else the ! calculation may become numerically unstable ! - impose perturbations every timestep, even though no new set of perturbations ! is generated in case dt_stg_call /= dt_3d ! - Implement a gradual decrease of Reynolds stress and length scales above ! ABL height (within 1 length scale above ABL depth to 1/10) rather than a ! discontinuous decrease ! - Bugfix in non-nested case: use ABL height for parametrized turbulence ! ! 3987 2019-05-22 09:52:13Z kanani ! Introduce alternative switch for debug output during timestepping ! ! 3938 2019-04-29 16:06:25Z suehring ! Remove unused variables ! ! 3937 2019-04-29 15:09:07Z suehring ! Minor bugfix in case of a very early restart where mc_factor is sill not ! present. ! Some modification and fixing of potential bugs in the calculation of scaling ! parameters used for synthetic turbulence parametrization. ! ! 3909 2019-04-17 09:13:25Z suehring ! Minor bugfix for last commit ! ! 3900 2019-04-16 15:17:43Z suehring ! Missing re-calculation of perturbation seeds in case of restarts ! ! 3891 2019-04-12 17:52:01Z suehring ! Bugfix in initialization in case of restart runs. ! ! 3885 2019-04-11 11:29:34Z kanani ! Changes related to global restructuring of location messages and introduction ! of additional debug messages ! ! ! removed unused variables ! ! 3719 2019-02-06 13:10:18Z kanani ! Removed log_point measurement from stg_init, since this part is counted to ! log_point(2) 'initialisation' already. Moved other log_points to calls of ! the subroutines in time_integration for better overview. ! ! 2259 2017-06-08 09:09:11Z gronemeier ! Initial revision ! ! Authors: ! -------- ! @author Tobias Gronemeier, Matthias Suehring, Atsushi Inagaki, Micha Gryschka, Christoph Knigge ! ! ! Description: ! ------------ !> The module generates turbulence at the inflow boundary based on a method by !> Xie and Castro (2008) utilizing a Lund rotation (Lund, 1998) and a mass-flux !> correction by Kim et al. (2013). !> The turbulence is correlated based on length scales in y- and z-direction and !> a time scale for each velocity component. The profiles of length and time !> scales, mean u, v, w, e and pt, and all components of the Reynolds stress !> tensor can be either read from file STG_PROFILES, or will be parametrized !> within the boundary layer. !> !> @todo test restart !> enable cyclic_fill !> implement turbulence generation for e and pt !> @todo Input of height-constant length scales via namelist !> @note !> @bug Height information from input file is not used. Profiles from input !> must match with current PALM grid. !> In case of restart, velocity seeds differ from precursor run if a11, !> a22, or a33 are zero. !------------------------------------------------------------------------------! MODULE synthetic_turbulence_generator_mod USE arrays_3d, & ONLY: dzw, & ddzw, & drho_air, & mean_inflow_profiles, & q, & q_init, & pt, & pt_init, & u, & u_init, & v, & v_init, & w, & zu, & zw USE basic_constants_and_equations_mod, & ONLY: g, & kappa, & pi USE control_parameters, & ONLY: bc_lr, & bc_ns, & child_domain, & coupling_char, & debug_output_timestep, & dt_3d, & e_init, & humidity, & initializing_actions, & intermediate_timestep_count, & intermediate_timestep_count_max, & length, & message_string, & nesting_offline, & neutral, & num_mean_inflow_profiles, & random_generator, & rans_mode, & restart_data_format_output, & restart_string, & syn_turb_gen, & time_since_reference_point, & turbulent_inflow USE cpulog, & ONLY: cpu_log, & log_point_s USE grid_variables, & ONLY: ddx, & ddy, & dx, & dy USE indices, & ONLY: nbgp, & nz, & nzb, & nzt, & nx, & nxl, & nxlu, & nxr, & ny, & nys, & nysv, & nyn, & wall_flags_total_0 USE kinds #if defined( __parallel ) && !defined( __mpifh ) USE MPI #endif USE nesting_offl_mod, & ONLY: nesting_offl_calc_zi, & zi_ribulk USE pegrid, & ONLY: comm1dx, & comm1dy, & comm2d, & ierr, & myidx, & myidy, & pdims USE pmc_interface, & ONLY : rans_mode_parent USE random_generator_parallel, & ONLY: init_parallel_random_generator, & random_dummy, & random_number_parallel, & random_seed_parallel USE restart_data_mpi_io_mod, & ONLY: rrd_mpi_io, & wrd_mpi_io USE transpose_indices, & ONLY: nzb_x, & nzt_x USE surface_mod, & ONLY: surf_def_h, & surf_lsm_h, & surf_usm_h IMPLICIT NONE #if defined( __parallel ) && defined( __mpifh ) INCLUDE "mpif.h" #endif LOGICAL :: velocity_seed_initialized = .FALSE. !< true after first call of stg_main LOGICAL :: parametrize_inflow_turbulence = .FALSE. !< flag indicating that inflow turbulence is either read from file (.FALSE.) or if it parametrized LOGICAL :: use_syn_turb_gen = .FALSE. !< switch to use synthetic turbulence generator LOGICAL :: compute_velocity_seeds_local = .TRUE. !< switch to decide whether velocity seeds are computed locally or if computation !< is distributed over several processes INTEGER(iwp) :: id_stg_left !< left lateral boundary core id in case of turbulence generator INTEGER(iwp) :: id_stg_north !< north lateral boundary core id in case of turbulence generator INTEGER(iwp) :: id_stg_right !< right lateral boundary core id in case of turbulence generator INTEGER(iwp) :: id_stg_south !< south lateral boundary core id in case of turbulence generator INTEGER(iwp) :: mergp !< maximum length scale (in gp) INTEGER(iwp) :: nzb_x_stg !< lower bound of z coordinate (required for transposing z on PEs along x) INTEGER(iwp) :: nzt_x_stg !< upper bound of z coordinate (required for transposing z on PEs along x) INTEGER(iwp) :: nzb_y_stg !< lower bound of z coordinate (required for transposing z on PEs along y) INTEGER(iwp) :: nzt_y_stg !< upper bound of z coordinate (required for transposing z on PEs along y) #if defined( __parallel ) INTEGER(iwp) :: stg_type_xz !< MPI type for full z range INTEGER(iwp) :: stg_type_xz_small !< MPI type for small z range INTEGER(iwp) :: stg_type_yz !< MPI type for full z range INTEGER(iwp) :: stg_type_yz_small !< MPI type for small z range #endif INTEGER(iwp), DIMENSION(3) :: nr_non_topo_xz = 0 !< number of non-topography grid points at xz cross-sections, !< required for bias correction of imposed perturbations INTEGER(iwp), DIMENSION(3) :: nr_non_topo_yz = 0 !< number of non-topography grid points at yz cross-sections, !< required for bias correction of imposed perturbations #if defined( __parallel ) INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: displs_xz !< displacement for MPI_GATHERV INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: recv_count_xz !< receive count for MPI_GATHERV INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: displs_yz !< displacement for MPI_GATHERV INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: recv_count_yz !< receive count for MPI_GATHERV #endif INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nux !< length scale of u in x direction (in gp) INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nuy !< length scale of u in y direction (in gp) INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nuz !< length scale of u in z direction (in gp) INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nvx !< length scale of v in x direction (in gp) INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nvy !< length scale of v in y direction (in gp) INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nvz !< length scale of v in z direction (in gp) INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nwx !< length scale of w in x direction (in gp) INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nwy !< length scale of w in y direction (in gp) INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nwz !< length scale of w in z direction (in gp) INTEGER(isp), DIMENSION(:), ALLOCATABLE :: id_rand_xz !< initial random IDs at xz inflow boundary INTEGER(isp), DIMENSION(:), ALLOCATABLE :: id_rand_yz !< initial random IDs at yz inflow boundary INTEGER(isp), DIMENSION(:,:), ALLOCATABLE :: seq_rand_xz !< initial random seeds at xz inflow boundary INTEGER(isp), DIMENSION(:,:), ALLOCATABLE :: seq_rand_yz !< initial random seeds at yz inflow boundary REAL(wp) :: blend !< value to create gradually and smooth blending of Reynolds stress and length !< scales above the boundary layer REAL(wp) :: blend_coeff = -2.3_wp !< coefficient used to ensure that blending functions decreases to 1/10 after !< one length scale above ABL top REAL(wp) :: d_l !< blend_coeff/length_scale REAL(wp) :: length_scale !< length scale, default is 8 x minimum grid spacing REAL(wp) :: dt_stg_adjust = 300.0_wp !< time interval for adjusting turbulence statistics REAL(wp) :: dt_stg_call = 0.0_wp !< time interval for calling synthetic turbulence generator REAL(wp) :: scale_l !< scaling parameter used for turbulence parametrization - Obukhov length REAL(wp) :: scale_us !< scaling parameter used for turbulence parametrization - friction velocity REAL(wp) :: scale_wm !< scaling parameter used for turbulence parametrization - momentum scale REAL(wp) :: time_stg_adjust = 0.0_wp !< time counter for adjusting turbulence information REAL(wp) :: time_stg_call = 0.0_wp !< time counter for calling generator REAL(wp), DIMENSION(3) :: mc_factor = 1.0_wp !< correction factor for the u,v,w-components to maintain original mass flux REAL(wp),DIMENSION(:), ALLOCATABLE :: r11 !< Reynolds parameter REAL(wp),DIMENSION(:), ALLOCATABLE :: r21 !< Reynolds parameter REAL(wp),DIMENSION(:), ALLOCATABLE :: r22 !< Reynolds parameter REAL(wp),DIMENSION(:), ALLOCATABLE :: r31 !< Reynolds parameter REAL(wp),DIMENSION(:), ALLOCATABLE :: r32 !< Reynolds parameter REAL(wp),DIMENSION(:), ALLOCATABLE :: r33 !< Reynolds parameter REAL(wp), DIMENSION(:), ALLOCATABLE :: a11 !< coefficient for Lund rotation REAL(wp), DIMENSION(:), ALLOCATABLE :: a21 !< coefficient for Lund rotation REAL(wp), DIMENSION(:), ALLOCATABLE :: a22 !< coefficient for Lund rotation REAL(wp), DIMENSION(:), ALLOCATABLE :: a31 !< coefficient for Lund rotation REAL(wp), DIMENSION(:), ALLOCATABLE :: a32 !< coefficient for Lund rotation REAL(wp), DIMENSION(:), ALLOCATABLE :: a33 !< coefficient for Lund rotation REAL(wp), DIMENSION(:), ALLOCATABLE :: tu !< Lagrangian time scale of u REAL(wp), DIMENSION(:), ALLOCATABLE :: tv !< Lagrangian time scale of v REAL(wp), DIMENSION(:), ALLOCATABLE :: tw !< Lagrangian time scale of w REAL(wp), DIMENSION(:,:), ALLOCATABLE :: bux !< filter function for u in x direction REAL(wp), DIMENSION(:,:), ALLOCATABLE :: buy !< filter function for u in y direction REAL(wp), DIMENSION(:,:), ALLOCATABLE :: buz !< filter function for u in z direction REAL(wp), DIMENSION(:,:), ALLOCATABLE :: bvx !< filter function for v in x direction REAL(wp), DIMENSION(:,:), ALLOCATABLE :: bvy !< filter function for v in y direction REAL(wp), DIMENSION(:,:), ALLOCATABLE :: bvz !< filter function for v in z direction REAL(wp), DIMENSION(:,:), ALLOCATABLE :: bwx !< filter function for w in y direction REAL(wp), DIMENSION(:,:), ALLOCATABLE :: bwy !< filter function for w in y direction REAL(wp), DIMENSION(:,:), ALLOCATABLE :: bwz !< filter function for w in z direction REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fu_xz !< velocity seed for u at xz plane REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fuo_xz !< velocity seed for u at xz plane with new random number REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fu_yz !< velocity seed for u at yz plane REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fuo_yz !< velocity seed for u at yz plane with new random number REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fv_xz !< velocity seed for v at xz plane REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fvo_xz !< velocity seed for v at xz plane with new random number REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fv_yz !< velocity seed for v at yz plane REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fvo_yz !< velocity seed for v at yz plane with new random number REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fw_xz !< velocity seed for w at xz plane REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fwo_xz !< velocity seed for w at xz plane with new random number REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fw_yz !< velocity seed for w at yz plane REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fwo_yz !< velocity seed for w at yz plane with new random number REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: dist_xz !< imposed disturbances at north/south boundary REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: dist_yz !< imposed disturbances at north/south boundary ! !-- PALM interfaces: !-- Adjust time and lenght scales, Reynolds stress, and filter functions INTERFACE stg_adjust MODULE PROCEDURE stg_adjust END INTERFACE stg_adjust ! !-- Input parameter checks to be done in check_parameters INTERFACE stg_check_parameters MODULE PROCEDURE stg_check_parameters END INTERFACE stg_check_parameters ! !-- Calculate filter functions INTERFACE stg_filter_func MODULE PROCEDURE stg_filter_func END INTERFACE stg_filter_func ! !-- Generate velocity seeds at south and north domain boundary INTERFACE stg_generate_seed_xz MODULE PROCEDURE stg_generate_seed_xz END INTERFACE stg_generate_seed_xz ! !-- Generate velocity seeds at left and/or right domain boundary INTERFACE stg_generate_seed_yz MODULE PROCEDURE stg_generate_seed_yz END INTERFACE stg_generate_seed_yz ! !-- Output of information to the header file INTERFACE stg_header MODULE PROCEDURE stg_header END INTERFACE stg_header ! !-- Initialization actions INTERFACE stg_init MODULE PROCEDURE stg_init END INTERFACE stg_init ! !-- Main procedure of synth. turb. gen. INTERFACE stg_main MODULE PROCEDURE stg_main END INTERFACE stg_main ! !-- Reading of NAMELIST parameters INTERFACE stg_parin MODULE PROCEDURE stg_parin END INTERFACE stg_parin ! !-- Reading of parameters for restart runs INTERFACE stg_rrd_global MODULE PROCEDURE stg_rrd_global_ftn MODULE PROCEDURE stg_rrd_global_mpi END INTERFACE stg_rrd_global ! !-- Writing of binary output for restart runs INTERFACE stg_wrd_global MODULE PROCEDURE stg_wrd_global END INTERFACE stg_wrd_global SAVE PRIVATE ! !-- Public interfaces PUBLIC stg_adjust, stg_check_parameters, stg_header, stg_init, stg_main, & stg_parin, stg_rrd_global, stg_wrd_global ! !-- Public variables PUBLIC dt_stg_call, dt_stg_adjust, id_stg_left, id_stg_north, & id_stg_right, id_stg_south, parametrize_inflow_turbulence, & time_stg_adjust, time_stg_call, use_syn_turb_gen CONTAINS !------------------------------------------------------------------------------! ! Description: ! ------------ !> Check parameters routine for synthetic turbulence generator !------------------------------------------------------------------------------! SUBROUTINE stg_check_parameters IF ( .NOT. use_syn_turb_gen .AND. .NOT. rans_mode .AND. & nesting_offline ) THEN message_string = 'Synthetic turbulence generator is required ' // & 'if offline nesting is applied and PALM operates ' // & 'in LES mode.' CALL message( 'stg_check_parameters', 'PA0520', 0, 0, 0, 6, 0 ) ENDIF IF ( .NOT. use_syn_turb_gen .AND. child_domain & .AND. rans_mode_parent .AND. .NOT. rans_mode ) THEN message_string = 'Synthetic turbulence generator is required ' // & 'when nesting is applied and parent operates in ' // & 'RANS-mode but current child in LES mode.' CALL message( 'stg_check_parameters', 'PA0524', 1, 2, 0, 6, 0 ) ENDIF IF ( use_syn_turb_gen ) THEN IF ( child_domain .AND. .NOT. rans_mode .AND. & .NOT. rans_mode_parent ) THEN message_string = 'Using synthetic turbulence generator ' // & 'is not allowed in LES-LES nesting.' CALL message( 'stg_check_parameters', 'PA0620', 1, 2, 0, 6, 0 ) ENDIF IF ( child_domain .AND. rans_mode .AND. & rans_mode_parent ) THEN message_string = 'Using synthetic turbulence generator ' // & 'is not allowed in RANS-RANS nesting.' CALL message( 'stg_check_parameters', 'PA0621', 1, 2, 0, 6, 0 ) ENDIF IF ( .NOT. nesting_offline .AND. .NOT. child_domain ) THEN IF ( INDEX( initializing_actions, 'set_constant_profiles' ) == 0 & .AND. INDEX( initializing_actions, 'read_restart_data' ) == 0 ) THEN message_string = 'Using synthetic turbulence generator ' // & 'requires %initializing_actions = ' // & '"set_constant_profiles" or "read_restart_data"' //& ', if not offline nesting is applied.' CALL message( 'stg_check_parameters', 'PA0015', 1, 2, 0, 6, 0 ) ENDIF IF ( bc_lr /= 'dirichlet/radiation' ) THEN message_string = 'Using synthetic turbulence generator ' // & 'requires &bc_lr = "dirichlet/radiation", ' // & 'if not offline nesting is applied.' CALL message( 'stg_check_parameters', 'PA0035', 1, 2, 0, 6, 0 ) ENDIF IF ( bc_ns /= 'cyclic' ) THEN message_string = 'Using synthetic turbulence generator ' // & 'requires &bc_ns = "cyclic", ' // & 'if not offline nesting is applied.' CALL message( 'stg_check_parameters', 'PA0037', 1, 2, 0, 6, 0 ) ENDIF ENDIF IF ( turbulent_inflow ) THEN message_string = 'Using synthetic turbulence generator ' // & 'in combination &with turbulent_inflow = .T. '// & 'is not allowed' CALL message( 'stg_check_parameters', 'PA0039', 1, 2, 0, 6, 0 ) ENDIF ! !-- Synthetic turbulence generator requires the parallel random generator IF ( random_generator /= 'random-parallel' ) THEN message_string = 'Using synthetic turbulence generator ' // & 'requires random_generator = random-parallel.' CALL message( 'stg_check_parameters', 'PA0421', 1, 2, 0, 6, 0 ) ENDIF ENDIF END SUBROUTINE stg_check_parameters !------------------------------------------------------------------------------! ! Description: ! ------------ !> Header output for synthetic turbulence generator !------------------------------------------------------------------------------! SUBROUTINE stg_header ( io ) INTEGER(iwp), INTENT(IN) :: io !< Unit of the output file ! !-- Write synthetic turbulence generator Header WRITE( io, 1 ) IF ( use_syn_turb_gen ) THEN WRITE( io, 2 ) ELSE WRITE( io, 3 ) ENDIF IF ( parametrize_inflow_turbulence ) THEN WRITE( io, 4 ) dt_stg_adjust ELSE WRITE( io, 5 ) ENDIF 1 FORMAT (//' Synthetic turbulence generator information:'/ & ' ------------------------------------------'/) 2 FORMAT (' synthetic turbulence generator is switched on') 3 FORMAT (' synthetic turbulence generator is switched off') 4 FORMAT (' imposed turbulence statistics are parametrized and ajdusted to boundary-layer development each ', F8.2, ' s' ) 5 FORMAT (' imposed turbulence is read from file' ) END SUBROUTINE stg_header !------------------------------------------------------------------------------! ! Description: ! ------------ !> Initialization of the synthetic turbulence generator !------------------------------------------------------------------------------! SUBROUTINE stg_init LOGICAL :: file_stg_exist = .FALSE. !< flag indicating whether parameter file for Reynolds stress and length scales exist #if defined( __parallel ) INTEGER(KIND=MPI_ADDRESS_KIND) :: extent !< extent of new MPI type INTEGER(KIND=MPI_ADDRESS_KIND) :: tob=0 !< dummy variable #endif INTEGER(iwp) :: i !> grid index in x-direction INTEGER(iwp) :: j !> loop index INTEGER(iwp) :: k !< index #if defined( __parallel ) INTEGER(iwp) :: newtype !< dummy MPI type INTEGER(iwp) :: realsize !< size of REAL variables #endif INTEGER(iwp), DIMENSION(3) :: nr_non_topo_xz_l = 0 !< number of non-topography grid points at xz-cross-section on subdomain INTEGER(iwp), DIMENSION(3) :: nr_non_topo_yz_l = 0 !< number of non-topography grid points at yz-cross-section on subdomain ! !-- Dummy variables used for reading profiles REAL(wp) :: d1 !< u profile REAL(wp) :: d2 !< v profile REAL(wp) :: d3 !< w profile REAL(wp) :: d5 !< e profile REAL(wp) :: luy !< length scale for u in y direction REAL(wp) :: luz !< length scale for u in z direction REAL(wp) :: lvy !< length scale for v in y direction REAL(wp) :: lvz !< length scale for v in z direction REAL(wp) :: lwy !< length scale for w in y direction REAL(wp) :: lwz !< length scale for w in z direction #if defined( __parallel ) REAL(wp) :: nnz !< increment used to determine processor decomposition of z-axis along x and y direction #endif REAL(wp) :: zz !< height #if defined( __parallel ) CALL MPI_BARRIER( comm2d, ierr ) #endif ! !-- Create mpi-datatypes for exchange in case of non-local but distributed !-- computation of the velocity seeds. This option is useful in !-- case large turbulent length scales are present, where the computational !-- effort becomes large and need to be parallelized. For parameterized !-- turbulence the length scales are small and computing the velocity seeds !-- locally is faster (no overhead by communication). IF ( .NOT. compute_velocity_seeds_local ) THEN #if defined( __parallel ) ! !-- Determine processor decomposition of z-axis along x- and y-direction nnz = nz / pdims(1) nzb_x_stg = 1 + myidx * INT( nnz ) nzt_x_stg = ( myidx + 1 ) * INT( nnz ) IF ( MOD( nz , pdims(1) ) /= 0 .AND. myidx == id_stg_right ) & nzt_x_stg = nzt_x_stg + myidx * ( nnz - INT( nnz ) ) IF ( nesting_offline .OR. ( child_domain .AND. rans_mode_parent & .AND. .NOT. rans_mode ) ) THEN nnz = nz / pdims(2) nzb_y_stg = 1 + myidy * INT( nnz ) nzt_y_stg = ( myidy + 1 ) * INT( nnz ) IF ( MOD( nz , pdims(2) ) /= 0 .AND. myidy == id_stg_north ) & nzt_y_stg = nzt_y_stg + myidy * ( nnz - INT( nnz ) ) ENDIF ! !-- Define MPI type used in stg_generate_seed_yz to gather vertical splitted !-- velocity seeds CALL MPI_TYPE_SIZE( MPI_REAL, realsize, ierr ) extent = 1 * realsize ! !-- Set-up MPI datatyp to involve all cores for turbulence generation at yz !-- layer !-- stg_type_yz: yz-slice with vertical bounds nzb:nzt+1 CALL MPI_TYPE_CREATE_SUBARRAY( 2, [nzt-nzb+2,nyn-nys+1], & [1,nyn-nys+1], [0,0], MPI_ORDER_FORTRAN, MPI_REAL, newtype, ierr ) CALL MPI_TYPE_CREATE_RESIZED( newtype, tob, extent, stg_type_yz, ierr ) CALL MPI_TYPE_COMMIT( stg_type_yz, ierr ) CALL MPI_TYPE_FREE( newtype, ierr ) ! stg_type_yz_small: yz-slice with vertical bounds nzb_x_stg:nzt_x_stg+1 CALL MPI_TYPE_CREATE_SUBARRAY( 2, [nzt_x_stg-nzb_x_stg+2,nyn-nys+1], & [1,nyn-nys+1], [0,0], MPI_ORDER_FORTRAN, MPI_REAL, newtype, ierr ) CALL MPI_TYPE_CREATE_RESIZED( newtype, tob, extent, stg_type_yz_small, ierr ) CALL MPI_TYPE_COMMIT( stg_type_yz_small, ierr ) CALL MPI_TYPE_FREE( newtype, ierr ) ! receive count and displacement for MPI_GATHERV in stg_generate_seed_yz ALLOCATE( recv_count_yz(pdims(1)), displs_yz(pdims(1)) ) recv_count_yz = nzt_x_stg-nzb_x_stg + 1 recv_count_yz(pdims(1)) = recv_count_yz(pdims(1)) + 1 DO j = 1, pdims(1) displs_yz(j) = 0 + (nzt_x_stg-nzb_x_stg+1) * (j-1) ENDDO ! !-- Set-up MPI datatyp to involve all cores for turbulence generation at xz !-- layer !-- stg_type_xz: xz-slice with vertical bounds nzb:nzt+1 IF ( nesting_offline .OR. ( child_domain .AND. rans_mode_parent & .AND. .NOT. rans_mode ) ) THEN CALL MPI_TYPE_CREATE_SUBARRAY( 2, [nzt-nzb+2,nxr-nxl+1], & [1,nxr-nxl+1], [0,0], MPI_ORDER_FORTRAN, MPI_REAL, newtype, ierr ) CALL MPI_TYPE_CREATE_RESIZED( newtype, tob, extent, stg_type_xz, ierr ) CALL MPI_TYPE_COMMIT( stg_type_xz, ierr ) CALL MPI_TYPE_FREE( newtype, ierr ) ! stg_type_yz_small: xz-slice with vertical bounds nzb_x_stg:nzt_x_stg+1 CALL MPI_TYPE_CREATE_SUBARRAY( 2, [nzt_y_stg-nzb_y_stg+2,nxr-nxl+1], & [1,nxr-nxl+1], [0,0], MPI_ORDER_FORTRAN, MPI_REAL, newtype, ierr ) CALL MPI_TYPE_CREATE_RESIZED( newtype, tob, extent, stg_type_xz_small, ierr ) CALL MPI_TYPE_COMMIT( stg_type_xz_small, ierr ) CALL MPI_TYPE_FREE( newtype, ierr ) ! receive count and displacement for MPI_GATHERV in stg_generate_seed_yz ALLOCATE( recv_count_xz(pdims(2)), displs_xz(pdims(2)) ) recv_count_xz = nzt_y_stg-nzb_y_stg + 1 recv_count_xz(pdims(2)) = recv_count_xz(pdims(2)) + 1 DO j = 1, pdims(2) displs_xz(j) = 0 + (nzt_y_stg-nzb_y_stg+1) * (j-1) ENDDO ENDIF #endif ENDIF ! !-- Allocate required arrays. !-- In case no offline nesting or self nesting is used, the arrary !-- mean_inflow profiles is required. Check if it is already allocated, else !-- allocate and initialize it appropriately. Note, in case turbulence and !-- inflow information is read from file, mean_inflow_profiles is already !-- allocated and initialized appropriately. IF ( .NOT. nesting_offline .AND. .NOT. child_domain ) THEN IF ( .NOT. ALLOCATED( mean_inflow_profiles ) ) THEN ALLOCATE( mean_inflow_profiles(nzb:nzt+1,1:num_mean_inflow_profiles) ) mean_inflow_profiles = 0.0_wp mean_inflow_profiles(:,1) = u_init mean_inflow_profiles(:,2) = v_init ! !-- Even though potential temperature and humidity are not perturbed, !-- they need to be initialized appropriately. IF ( .NOT. neutral ) & mean_inflow_profiles(:,4) = pt_init IF ( humidity ) & mean_inflow_profiles(:,6) = q_init ENDIF ENDIF ALLOCATE ( a11(nzb:nzt+1), a21(nzb:nzt+1), a22(nzb:nzt+1), & a31(nzb:nzt+1), a32(nzb:nzt+1), a33(nzb:nzt+1), & nux(nzb:nzt+1), nuy(nzb:nzt+1), nuz(nzb:nzt+1), & nvx(nzb:nzt+1), nvy(nzb:nzt+1), nvz(nzb:nzt+1), & nwx(nzb:nzt+1), nwy(nzb:nzt+1), nwz(nzb:nzt+1), & r11(nzb:nzt+1), r21(nzb:nzt+1), r22(nzb:nzt+1), & r31(nzb:nzt+1), r32(nzb:nzt+1), r33(nzb:nzt+1), & tu(nzb:nzt+1), tv(nzb:nzt+1), tw(nzb:nzt+1) ) ALLOCATE ( dist_xz(nzb:nzt+1,nxl:nxr,3) ) ALLOCATE ( dist_yz(nzb:nzt+1,nys:nyn,3) ) dist_xz = 0.0_wp dist_yz = 0.0_wp ! !-- Read inflow profile !-- Height levels of profiles in input profile is as follows: !-- zu: luy, luz, tu, lvy, lvz, tv, r11, r21, r22, d1, d2, d5 !-- zw: lwy, lwz, tw, r31, r32, r33, d3 !-- WARNING: zz is not used at the moment INQUIRE( FILE = 'STG_PROFILES' // TRIM( coupling_char ), & EXIST = file_stg_exist ) IF ( file_stg_exist ) THEN OPEN( 90, FILE='STG_PROFILES'//TRIM( coupling_char ), STATUS='OLD', & FORM='FORMATTED') ! !-- Skip header READ( 90, * ) DO k = nzb+1, nzt+1 READ( 90, * ) zz, luy, luz, tu(k), lvy, lvz, tv(k), lwy, lwz, tw(k), & r11(k), r21(k), r22(k), r31(k), r32(k), r33(k), & d1, d2, d3, d5 ! !-- Convert length scales from meter to number of grid points. nuy(k) = INT( luy * ddy ) nuz(k) = INT( luz * ddzw(k) ) nvy(k) = INT( lvy * ddy ) nvz(k) = INT( lvz * ddzw(k) ) nwy(k) = INT( lwy * ddy ) nwz(k) = INT( lwz * ddzw(k) ) ! !-- Workaround, assume isotropic turbulence nwx(k) = nwy(k) nvx(k) = nvy(k) nux(k) = nuy(k) ! !-- Save Mean inflow profiles IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN mean_inflow_profiles(k,1) = d1 mean_inflow_profiles(k,2) = d2 ! mean_inflow_profiles(k,4) = d4 mean_inflow_profiles(k,5) = d5 ENDIF ENDDO ! !-- Set lenght scales at surface grid point nuy(nzb) = nuy(nzb+1) nuz(nzb) = nuz(nzb+1) nvy(nzb) = nvy(nzb+1) nvz(nzb) = nvz(nzb+1) nwy(nzb) = nwy(nzb+1) nwz(nzb) = nwz(nzb+1) CLOSE( 90 ) ! !-- Calculate coefficient matrix from Reynolds stress tensor !-- (Lund rotation) CALL calc_coeff_matrix ! !-- No information about turbulence and its length scales are available. !-- Instead, parametrize turbulence which is imposed at the boundaries. !-- Set flag which indicates that turbulence is parametrized, which is done !-- later when energy-balance models are already initialized. This is !-- because the STG needs information about surface properties such as !-- roughness to build 'realistic' turbulence profiles. ELSE ! !-- Define length scale for the imposed turbulence, which is defined as !-- 8 times the minimum grid spacing length_scale = 8.0_wp * MIN( dx, dy, MINVAL( dzw ) ) ! !-- Define constant to gradually decrease length scales and Reynolds stress !-- above ABL top. Assure that no zero length scales are used. d_l = blend_coeff / MAX( length_scale, dx, dy, MINVAL( dzw ) ) ! !-- Set flag indicating that turbulence is parametrized parametrize_inflow_turbulence = .TRUE. ! !-- In case of dirichlet inflow boundary conditions only at one lateral !-- boundary, i.e. in the case no offline or self nesting is applied but !-- synthetic turbulence shall be parametrized nevertheless, the !-- boundary-layer depth need to determined first. IF ( .NOT. nesting_offline .AND. .NOT. child_domain ) & CALL nesting_offl_calc_zi ! !-- Determine boundary-layer depth, which is used to initialize lenght !-- scales CALL calc_scaling_variables ! !-- Initialize lenght and time scales, which in turn are used !-- to initialize the filter functions. CALL calc_length_and_time_scale ! !-- Parametrize Reynolds-stress tensor, diagonal elements as well !-- as r21 (v'u'), r31 (w'u'), r32 (w'v'). Parametrization follows !-- Rotach et al. (1996) and is based on boundary-layer depth, !-- friction velocity and velocity scale. CALL parametrize_reynolds_stress ! !-- Calculate coefficient matrix from Reynolds stress tensor !-- (Lund rotation) CALL calc_coeff_matrix ENDIF ! !-- Assign initial profiles. Note, this is only required if turbulent !-- inflow from the left is desired, not in case of any of the !-- nesting (offline or self nesting) approaches. IF ( .NOT. nesting_offline .AND. .NOT. child_domain ) THEN u_init = mean_inflow_profiles(:,1) v_init = mean_inflow_profiles(:,2) !pt_init = mean_inflow_profiles(:,4) e_init = MAXVAL( mean_inflow_profiles(:,5) ) ENDIF ! !-- Define the size of the filter functions and allocate them. mergp = 0 ! arrays must be large enough to cover the largest length scale DO k = nzb, nzt+1 j = MAX( ABS(nux(k)), ABS(nuy(k)), ABS(nuz(k)), & ABS(nvx(k)), ABS(nvy(k)), ABS(nvz(k)), & ABS(nwx(k)), ABS(nwy(k)), ABS(nwz(k)) ) IF ( j > mergp ) mergp = j ENDDO ! mergp = 2 * mergp ! mergp = mergp ALLOCATE ( bux(-mergp:mergp,nzb:nzt+1), & buy(-mergp:mergp,nzb:nzt+1), & buz(-mergp:mergp,nzb:nzt+1), & bvx(-mergp:mergp,nzb:nzt+1), & bvy(-mergp:mergp,nzb:nzt+1), & bvz(-mergp:mergp,nzb:nzt+1), & bwx(-mergp:mergp,nzb:nzt+1), & bwy(-mergp:mergp,nzb:nzt+1), & bwz(-mergp:mergp,nzb:nzt+1) ) ! !-- Allocate velocity seeds for turbulence at xz-layer ALLOCATE ( fu_xz( nzb:nzt+1,nxl:nxr), fuo_xz(nzb:nzt+1,nxl:nxr), & fv_xz( nzb:nzt+1,nxl:nxr), fvo_xz(nzb:nzt+1,nxl:nxr), & fw_xz( nzb:nzt+1,nxl:nxr), fwo_xz(nzb:nzt+1,nxl:nxr) ) ! !-- Allocate velocity seeds for turbulence at yz-layer ALLOCATE ( fu_yz( nzb:nzt+1,nys:nyn), fuo_yz(nzb:nzt+1,nys:nyn), & fv_yz( nzb:nzt+1,nys:nyn), fvo_yz(nzb:nzt+1,nys:nyn), & fw_yz( nzb:nzt+1,nys:nyn), fwo_yz(nzb:nzt+1,nys:nyn) ) fu_xz = 0.0_wp fuo_xz = 0.0_wp fv_xz = 0.0_wp fvo_xz = 0.0_wp fw_xz = 0.0_wp fwo_xz = 0.0_wp fu_yz = 0.0_wp fuo_yz = 0.0_wp fv_yz = 0.0_wp fvo_yz = 0.0_wp fw_yz = 0.0_wp fwo_yz = 0.0_wp ! !-- Create filter functions CALL stg_filter_func( nux, bux ) !filter ux CALL stg_filter_func( nuy, buy ) !filter uy CALL stg_filter_func( nuz, buz ) !filter uz CALL stg_filter_func( nvx, bvx ) !filter vx CALL stg_filter_func( nvy, bvy ) !filter vy CALL stg_filter_func( nvz, bvz ) !filter vz CALL stg_filter_func( nwx, bwx ) !filter wx CALL stg_filter_func( nwy, bwy ) !filter wy CALL stg_filter_func( nwz, bwz ) !filter wz #if defined( __parallel ) CALL MPI_BARRIER( comm2d, ierr ) #endif ! !-- In case of restart, calculate velocity seeds fu, fv, fw from former ! time step. ! Bug: fu, fv, fw are different in those heights where a11, a22, a33 ! are 0 compared to the prerun. This is mostly for k=nzt+1. IF ( TRIM( initializing_actions ) == 'read_restart_data' ) THEN IF ( myidx == id_stg_left .OR. myidx == id_stg_right ) THEN IF ( myidx == id_stg_left ) i = -1 IF ( myidx == id_stg_right ) i = nxr+1 DO j = nys, nyn DO k = nzb, nzt+1 IF ( a11(k) > 10E-8_wp ) THEN fu_yz(k,j) = ( u(k,j,i) - u_init(k) ) / a11(k) ELSE fu_yz(k,j) = 10E-8_wp ENDIF IF ( a22(k) > 10E-8_wp ) THEN fv_yz(k,j) = ( v(k,j,i) - & a21(k) * fu_yz(k,j) - v_init(k) ) / a22(k) ELSE fv_yz(k,j) = 10E-8_wp ENDIF IF ( a33(k) > 10E-8_wp ) THEN fw_yz(k,j) = ( w(k,j,i) - & a31(k) * fu_yz(k,j) - a32(k) * & fv_yz(k,j) ) / a33(k) ELSE fw_yz(k,j) = 10E-8_wp ENDIF ENDDO ENDDO ENDIF IF ( myidy == id_stg_south .OR. myidy == id_stg_north ) THEN IF ( myidy == id_stg_south ) j = -1 IF ( myidy == id_stg_north ) j = nyn+1 DO i = nxl, nxr DO k = nzb, nzt+1 ! !-- In case the correlation coefficients are very small, the !-- velocity seeds may become very large finally creating !-- numerical instabilities in the synthetic turbulence generator. !-- Empirically, a value of 10E-8 seems to be sufficient. IF ( a11(k) > 10E-8_wp ) THEN fu_xz(k,i) = ( u(k,j,i) - u_init(k) ) / a11(k) ELSE fu_xz(k,i) = 10E-8_wp ENDIF IF ( a22(k) > 10E-8_wp ) THEN fv_xz(k,i) = ( v(k,j,i) - & a21(k) * fu_xz(k,i) - v_init(k) ) / a22(k) ELSE fv_xz(k,i) = 10E-8_wp ENDIF IF ( a33(k) > 10E-8_wp ) THEN fw_xz(k,i) = ( w(k,j,i) - & a31(k) * fu_xz(k,i) - & a32(k) * fv_xz(k,i) ) / a33(k) ELSE fw_xz(k,i) = 10E-8_wp ENDIF ENDDO ENDDO ENDIF ENDIF ! !-- Count the number of non-topography grid points at the boundaries where !-- perturbations are imposed. This number is later used for bias corrections !-- of the perturbations, i.e. to force that their mean is zero. Please note, !-- due to the asymetry of u and v along x and y direction, respectively, !-- different cases must be distinguished. IF ( myidx == id_stg_left .OR. myidx == id_stg_right ) THEN ! !-- Number of grid points where perturbations are imposed on u IF ( myidx == id_stg_left ) i = nxl IF ( myidx == id_stg_right ) i = nxr+1 nr_non_topo_yz_l(1) = SUM( & MERGE( 1, 0, & BTEST( wall_flags_total_0(nzb:nzt,nys:nyn,i), 1 ) ) ) ! !-- Number of grid points where perturbations are imposed on v and w IF ( myidx == id_stg_left ) i = nxl-1 IF ( myidx == id_stg_right ) i = nxr+1 nr_non_topo_yz_l(2) = SUM( & MERGE( 1, 0, & BTEST( wall_flags_total_0(nzb:nzt,nysv:nyn,i), 2 ) ) ) nr_non_topo_yz_l(3) = SUM( & MERGE( 1, 0, & BTEST( wall_flags_total_0(nzb:nzt,nys:nyn,i), 3 ) ) ) #if defined( __parallel ) CALL MPI_ALLREDUCE( nr_non_topo_yz_l, nr_non_topo_yz, 3, MPI_INTEGER, & MPI_SUM, comm1dy, ierr ) #else nr_non_topo_yz = nr_non_topo_yz_l #endif ENDIF IF ( myidy == id_stg_south .OR. myidy == id_stg_north ) THEN ! !-- Number of grid points where perturbations are imposed on v IF ( myidy == id_stg_south ) j = nys IF ( myidy == id_stg_north ) j = nyn+1 nr_non_topo_xz_l(2) = SUM( & MERGE( 1, 0, & BTEST( wall_flags_total_0(nzb:nzt,j,nxl:nxr), 2 ) ) ) ! !-- Number of grid points where perturbations are imposed on u and w IF ( myidy == id_stg_south ) j = nys-1 IF ( myidy == id_stg_north ) j = nyn+1 nr_non_topo_xz_l(1) = SUM( & MERGE( 1, 0, & BTEST( wall_flags_total_0(nzb:nzt,j,nxlu:nxr), 1 ) ) ) nr_non_topo_xz_l(3) = SUM( & MERGE( 1, 0, & BTEST( wall_flags_total_0(nzb:nzt,j,nxl:nxr), 3 ) ) ) #if defined( __parallel ) CALL MPI_ALLREDUCE( nr_non_topo_xz_l, nr_non_topo_xz, 3, MPI_INTEGER, & MPI_SUM, comm1dx, ierr ) #else nr_non_topo_xz = nr_non_topo_xz_l #endif ENDIF ! !-- Initialize random number generator at xz- and yz-layers. Random numbers !-- are initialized at each core. In case there is only inflow from the left, !-- it is sufficient to generate only random numbers for the yz-layer, else !-- random numbers for the xz-layer are also required. ALLOCATE ( id_rand_yz(-mergp+nys:nyn+mergp) ) ALLOCATE ( seq_rand_yz(5,-mergp+nys:nyn+mergp) ) id_rand_yz = 0 seq_rand_yz = 0 CALL init_parallel_random_generator( ny, -mergp+nys, nyn+mergp, & id_rand_yz, seq_rand_yz ) IF ( nesting_offline .OR. ( child_domain .AND. rans_mode_parent & .AND. .NOT. rans_mode ) ) THEN ALLOCATE ( id_rand_xz(-mergp+nxl:nxr+mergp) ) ALLOCATE ( seq_rand_xz(5,-mergp+nxl:nxr+mergp) ) id_rand_xz = 0 seq_rand_xz = 0 CALL init_parallel_random_generator( nx, -mergp+nxl, nxr+mergp, & id_rand_xz, seq_rand_xz ) ENDIF END SUBROUTINE stg_init !------------------------------------------------------------------------------! ! Description: ! ------------ !> Calculate filter function bxx from length scale nxx following Eg.9 and 10 !> (Xie and Castro, 2008) !------------------------------------------------------------------------------! SUBROUTINE stg_filter_func( nxx, bxx ) INTEGER(iwp) :: k !< loop index INTEGER(iwp) :: n_k !< length scale nXX in height k INTEGER(iwp) :: nf !< index for length scales REAL(wp) :: bdenom !< denominator for filter functions bXX REAL(wp) :: qsi = 1.0_wp !< minimization factor INTEGER(iwp), DIMENSION(nzb:nzt+1) :: nxx !< length scale (in gp) REAL(wp), DIMENSION(-mergp:mergp,nzb:nzt+1) :: bxx !< filter function bxx = 0.0_wp DO k = nzb, nzt+1 bdenom = 0.0_wp n_k = nxx(k) IF ( n_k /= 0 ) THEN ! !-- ( Eq.10 )^2 DO nf = -n_k, n_k bdenom = bdenom + EXP( -qsi * pi * ABS(nf) / n_k )**2 ENDDO ! !-- ( Eq.9 ) bdenom = SQRT( bdenom ) DO nf = -n_k, n_k bxx(nf,k) = EXP( -qsi * pi * ABS(nf) / n_k ) / bdenom ENDDO ENDIF ENDDO END SUBROUTINE stg_filter_func !------------------------------------------------------------------------------! ! Description: ! ------------ !> Parin for &stg_par for synthetic turbulence generator !------------------------------------------------------------------------------! SUBROUTINE stg_parin CHARACTER (LEN=80) :: line !< dummy string that contains the current line of the parameter file NAMELIST /stg_par/ dt_stg_adjust, & dt_stg_call, & use_syn_turb_gen, & compute_velocity_seeds_local line = ' ' ! !-- Try to find stg package REWIND ( 11 ) line = ' ' DO WHILE ( INDEX( line, '&stg_par' ) == 0 ) READ ( 11, '(A)', END=20 ) line ENDDO BACKSPACE ( 11 ) ! !-- Read namelist READ ( 11, stg_par, ERR = 10, END = 20 ) ! !-- Set flag that indicates that the synthetic turbulence generator is switched !-- on syn_turb_gen = .TRUE. GOTO 20 10 BACKSPACE( 11 ) READ( 11 , '(A)') line CALL parin_fail_message( 'stg_par', line ) 20 CONTINUE END SUBROUTINE stg_parin !------------------------------------------------------------------------------! ! Description: ! ------------ !> Read module-specific global restart data (Fortran binary format). !------------------------------------------------------------------------------! SUBROUTINE stg_rrd_global_ftn( found ) LOGICAL, INTENT(OUT) :: found !< flag indicating if variable was found found = .TRUE. SELECT CASE ( restart_string(1:length) ) CASE ( 'time_stg_adjust' ) READ ( 13 ) time_stg_adjust CASE ( 'time_stg_call' ) READ ( 13 ) time_stg_call CASE ( 'use_syn_turb_gen' ) READ ( 13 ) use_syn_turb_gen CASE DEFAULT found = .FALSE. END SELECT END SUBROUTINE stg_rrd_global_ftn !------------------------------------------------------------------------------! ! Description: ! ------------ !> Read module-specific global restart data (MPI-IO). !------------------------------------------------------------------------------! SUBROUTINE stg_rrd_global_mpi CALL rrd_mpi_io( 'time_stg_adjust', time_stg_adjust ) CALL rrd_mpi_io( 'time_stg_call', time_stg_call ) CALL rrd_mpi_io( 'use_syn_turb_gen', use_syn_turb_gen ) END SUBROUTINE stg_rrd_global_mpi !------------------------------------------------------------------------------! ! Description: ! ------------ !> This routine writes the respective restart data. !------------------------------------------------------------------------------! SUBROUTINE stg_wrd_global IF ( TRIM( restart_data_format_output ) == 'fortran_binary' ) THEN CALL wrd_write_string( 'time_stg_adjust' ) WRITE ( 14 ) time_stg_adjust CALL wrd_write_string( 'time_stg_call' ) WRITE ( 14 ) time_stg_call CALL wrd_write_string( 'use_syn_turb_gen' ) WRITE ( 14 ) use_syn_turb_gen ELSEIF ( TRIM( restart_data_format_output ) == 'mpi' ) THEN CALL wrd_mpi_io( 'time_stg_adjust', time_stg_adjust ) CALL wrd_mpi_io( 'time_stg_call', time_stg_call ) CALL wrd_mpi_io( 'use_syn_turb_gen', use_syn_turb_gen ) ENDIF END SUBROUTINE stg_wrd_global !------------------------------------------------------------------------------! ! Description: ! ------------ !> Create turbulent inflow fields for u, v, w with prescribed length scales and !> Reynolds stress tensor after a method of Xie and Castro (2008), modified !> following suggestions of Kim et al. (2013), and using a Lund rotation !> (Lund, 1998). !------------------------------------------------------------------------------! SUBROUTINE stg_main USE exchange_horiz_mod, & ONLY: exchange_horiz INTEGER(iwp) :: i !< grid index in x-direction INTEGER(iwp) :: j !< loop index in y-direction INTEGER(iwp) :: k !< loop index in z-direction LOGICAL :: stg_call = .FALSE. !< control flag indicating whether turbulence was updated or only restored from last call REAL(wp) :: dt_stg !< wheighted subtimestep REAL(wp), DIMENSION(3) :: mc_factor_l !< local mass flux correction factor IF ( debug_output_timestep ) CALL debug_message( 'stg_main', 'start' ) ! !-- Calculate time step which is needed for filter functions dt_stg = MAX( dt_3d, dt_stg_call ) ! !-- Check if synthetic turbulence generator needs to be called and new !-- perturbations need to be created or if old disturbances can be imposed !-- again. IF ( time_stg_call >= dt_stg_call .AND. & intermediate_timestep_count == intermediate_timestep_count_max ) THEN stg_call = .TRUE. ELSE stg_call = .FALSE. ENDIF ! !-- Initial value of fu, fv, fw IF ( time_since_reference_point == 0.0_wp .AND. .NOT. velocity_seed_initialized ) THEN ! !-- Generate turbulence at the left and right boundary. Random numbers !-- for the yz-planes at the left/right boundary are generated by the !-- left-sided mpi ranks only. After random numbers are calculated, they !-- are distributed to all other mpi ranks in the model, so that the !-- velocity seed matrices are available on all mpi ranks (i.e. also on the !-- right-sided boundary mpi ranks). In case of offline nesting, this implies, !-- that the left- and the right-sided lateral boundary have the same initial !-- seeds. !-- Note, in case of inflow from the right only, only turbulence at the left !-- boundary is required. IF ( .NOT. ( nesting_offline .OR. & ( child_domain .AND. rans_mode_parent & .AND. .NOT. rans_mode ) ) ) THEN CALL stg_generate_seed_yz( nuy, nuz, buy, buz, fu_yz, id_stg_left ) CALL stg_generate_seed_yz( nvy, nvz, bvy, bvz, fv_yz, id_stg_left ) CALL stg_generate_seed_yz( nwy, nwz, bwy, bwz, fw_yz, id_stg_left ) ELSE CALL stg_generate_seed_yz( nuy, nuz, buy, buz, fu_yz, & id_stg_left, id_stg_right ) CALL stg_generate_seed_yz( nvy, nvz, bvy, bvz, fv_yz, & id_stg_left, id_stg_right ) CALL stg_generate_seed_yz( nwy, nwz, bwy, bwz, fw_yz, & id_stg_left, id_stg_right ) ! !-- Generate turbulence at the south and north boundary. Random numbers !-- for the xz-planes at the south/north boundary are generated by the !-- south-sided mpi ranks only. Please see also comment above. CALL stg_generate_seed_xz( nux, nuz, bux, buz, fu_xz, & id_stg_south, id_stg_north ) CALL stg_generate_seed_xz( nvx, nvz, bvx, bvz, fv_xz, & id_stg_south, id_stg_north ) CALL stg_generate_seed_xz( nwx, nwz, bwx, bwz, fw_xz, & id_stg_south, id_stg_north ) ENDIF velocity_seed_initialized = .TRUE. ENDIF ! !-- New set of fu, fv, fw. Note, for inflow from the left side only, velocity !-- seeds are only required at the left boundary, while in case of offline !-- nesting or RANS-LES nesting velocity seeds are required also at the !-- right, south and north boundaries. IF ( stg_call ) THEN IF ( .NOT. ( nesting_offline .OR. & ( child_domain .AND. rans_mode_parent & .AND. .NOT. rans_mode ) ) ) THEN CALL stg_generate_seed_yz( nuy, nuz, buy, buz, fuo_yz, id_stg_left ) CALL stg_generate_seed_yz( nvy, nvz, bvy, bvz, fvo_yz, id_stg_left ) CALL stg_generate_seed_yz( nwy, nwz, bwy, bwz, fwo_yz, id_stg_left ) ELSE CALL stg_generate_seed_yz( nuy, nuz, buy, buz, fuo_yz, & id_stg_left, id_stg_right ) CALL stg_generate_seed_yz( nvy, nvz, bvy, bvz, fvo_yz, & id_stg_left, id_stg_right ) CALL stg_generate_seed_yz( nwy, nwz, bwy, bwz, fwo_yz, & id_stg_left, id_stg_right ) CALL stg_generate_seed_xz( nux, nuz, bux, buz, fuo_xz, & id_stg_south, id_stg_north ) CALL stg_generate_seed_xz( nvx, nvz, bvx, bvz, fvo_xz, & id_stg_south, id_stg_north ) CALL stg_generate_seed_xz( nwx, nwz, bwx, bwz, fwo_xz, & id_stg_south, id_stg_north ) ENDIF ENDIF ! !-- Turbulence generation at left and/or right boundary IF ( myidx == id_stg_left .OR. myidx == id_stg_right ) THEN ! !-- Calculate new set of perturbations. Do this only at last RK3-substep and !-- when dt_stg_call is exceeded. Else the old set of perturbations is !-- imposed IF ( stg_call ) THEN DO j = nys, nyn DO k = nzb, nzt + 1 ! !-- Update fu, fv, fw following Eq. 14 of Xie and Castro (2008) IF ( tu(k) == 0.0_wp ) THEN fu_yz(k,j) = fuo_yz(k,j) ELSE fu_yz(k,j) = fu_yz(k,j) * EXP( -pi * dt_stg * 0.5_wp / tu(k) ) + & fuo_yz(k,j) * SQRT( 1.0_wp - EXP( -pi * dt_stg / tu(k) ) ) ENDIF IF ( tv(k) == 0.0_wp ) THEN fv_yz(k,j) = fvo_yz(k,j) ELSE fv_yz(k,j) = fv_yz(k,j) * EXP( -pi * dt_stg * 0.5_wp / tv(k) ) + & fvo_yz(k,j) * SQRT( 1.0_wp - EXP( -pi * dt_stg / tv(k) ) ) ENDIF IF ( tw(k) == 0.0_wp ) THEN fw_yz(k,j) = fwo_yz(k,j) ELSE fw_yz(k,j) = fw_yz(k,j) * EXP( -pi * dt_stg * 0.5_wp / tw(k) ) + & fwo_yz(k,j) * SQRT( 1.0_wp - EXP( -pi * dt_stg / tw(k) ) ) ENDIF ENDDO ENDDO dist_yz(nzb,:,1) = 0.0_wp dist_yz(nzb,:,2) = 0.0_wp dist_yz(nzb,:,3) = 0.0_wp IF ( myidx == id_stg_left ) i = nxl IF ( myidx == id_stg_right ) i = nxr+1 DO j = nys, nyn DO k = nzb+1, nzt + 1 ! !-- Lund rotation following Eq. 17 in Xie and Castro (2008). !-- Additional factors are added to improve the variance of v and w dist_yz(k,j,1) = MIN( a11(k) * fu_yz(k,j), 3.0_wp ) * & MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,j,i), 1 ) ) ENDDO ENDDO IF ( myidx == id_stg_left ) i = nxl-1 IF ( myidx == id_stg_right ) i = nxr+1 DO j = nys, nyn DO k = nzb+1, nzt + 1 ! !-- Lund rotation following Eq. 17 in Xie and Castro (2008). !-- Additional factors are added to improve the variance of v and w !-- experimental test of 1.2 dist_yz(k,j,2) = MIN( ( SQRT( a22(k) / MAXVAL(a22) ) & * 1.2_wp ) & * ( a21(k) * fu_yz(k,j) & + a22(k) * fv_yz(k,j) ), 3.0_wp ) * & MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,j,i), 2 ) ) dist_yz(k,j,3) = MIN( ( SQRT(a33(k) / MAXVAL(a33) ) & * 1.3_wp ) & * ( a31(k) * fu_yz(k,j) & + a32(k) * fv_yz(k,j) & + a33(k) * fw_yz(k,j) ), 3.0_wp ) * & MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,j,i), 3 ) ) ENDDO ENDDO ENDIF ! !-- Mass flux correction following Kim et al. (2013) !-- This correction factor insures that the mass flux is preserved at the !-- inflow boundary. First, calculate mean value of the imposed !-- perturbations at yz boundary. !-- Note, this needs to be done only after the last RK3-substep, else !-- the boundary values won't be accessed. IF ( intermediate_timestep_count == intermediate_timestep_count_max ) THEN mc_factor_l = 0.0_wp mc_factor = 0.0_wp ! !-- Sum up the original volume flows (with and without perturbations). !-- Note, for non-normal components (here v and w) it is actually no !-- volume flow. IF ( myidx == id_stg_left ) i = nxl IF ( myidx == id_stg_right ) i = nxr+1 mc_factor_l(1) = SUM( dist_yz(nzb:nzt,nys:nyn,1) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(nzb:nzt,nys:nyn,i), 1 ) ) ) IF ( myidx == id_stg_left ) i = nxl-1 IF ( myidx == id_stg_right ) i = nxr+1 mc_factor_l(2) = SUM( dist_yz(nzb:nzt,nysv:nyn,2) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(nzb:nzt,nysv:nyn,i), 2 ) ) ) mc_factor_l(3) = SUM( dist_yz(nzb:nzt,nys:nyn,3) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(nzb:nzt,nys:nyn,i), 3 ) ) ) #if defined( __parallel ) CALL MPI_ALLREDUCE( mc_factor_l, mc_factor, & 3, MPI_REAL, MPI_SUM, comm1dy, ierr ) #else mc_factor = mc_factor_l #endif ! !-- Calculate correction factor and force zero mean perturbations. mc_factor = mc_factor / REAL( nr_non_topo_yz, KIND = wp ) IF ( myidx == id_stg_left ) i = nxl IF ( myidx == id_stg_right ) i = nxr+1 dist_yz(:,nys:nyn,1) = ( dist_yz(:,nys:nyn,1) - mc_factor(1) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(:,nys:nyn,i), 1 ) ) IF ( myidx == id_stg_left ) i = nxl-1 IF ( myidx == id_stg_right ) i = nxr+1 dist_yz(:,nys:nyn,2) = ( dist_yz(:,nys:nyn,2) - mc_factor(2) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(:,nys:nyn,i), 2 ) ) dist_yz(:,nys:nyn,3) = ( dist_yz(:,nys:nyn,3) - mc_factor(3) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(:,nys:nyn,i), 3 ) ) ! !-- Add disturbances IF ( myidx == id_stg_left ) THEN ! !-- For the left boundary distinguish between mesoscale offline / self !-- nesting and turbulent inflow at the left boundary only. In the latter !-- case turbulence is imposed on the mean inflow profiles. IF ( .NOT. nesting_offline .AND. .NOT. child_domain ) THEN ! !-- Add disturbance at the inflow DO j = nys, nyn DO k = nzb, nzt+1 u(k,j,-nbgp+1:0) = ( mean_inflow_profiles(k,1) + & dist_yz(k,j,1) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,j,0), 1 ) ) v(k,j,-nbgp:-1) = ( mean_inflow_profiles(k,2) + & dist_yz(k,j,2) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,j,-1), 2 ) ) w(k,j,-nbgp:-1) = dist_yz(k,j,3) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,j,-1), 3 ) ) ENDDO ENDDO ELSE DO j = nys, nyn DO k = nzb+1, nzt u(k,j,0) = ( u(k,j,0) + dist_yz(k,j,1) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,j,0), 1 ) ) u(k,j,-1) = u(k,j,0) v(k,j,-1) = ( v(k,j,-1) + dist_yz(k,j,2) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,j,-1), 2 ) ) w(k,j,-1) = ( w(k,j,-1) + dist_yz(k,j,3) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,j,-1), 3 ) ) ENDDO ENDDO ENDIF ENDIF IF ( myidx == id_stg_right ) THEN DO j = nys, nyn DO k = nzb+1, nzt u(k,j,nxr+1) = ( u(k,j,nxr+1) + dist_yz(k,j,1) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,j,nxr+1), 1 ) ) v(k,j,nxr+1) = ( v(k,j,nxr+1) + dist_yz(k,j,2) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,j,nxr+1), 2 ) ) w(k,j,nxr+1) = ( w(k,j,nxr+1) + dist_yz(k,j,3) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,j,nxr+1), 3 ) ) ENDDO ENDDO ENDIF ENDIF ENDIF ! !-- Turbulence generation at north and south boundary IF ( myidy == id_stg_north .OR. myidy == id_stg_south ) THEN ! !-- Calculate new set of perturbations. Do this only at last RK3-substep and !-- when dt_stg_call is exceeded. Else the old set of perturbations is !-- imposed IF ( stg_call ) THEN DO i = nxl, nxr DO k = nzb, nzt + 1 ! !-- Update fu, fv, fw following Eq. 14 of Xie and Castro (2008) IF ( tu(k) == 0.0_wp ) THEN fu_xz(k,i) = fuo_xz(k,i) ELSE fu_xz(k,i) = fu_xz(k,i) * EXP( -pi * dt_stg * 0.5_wp / tu(k) ) + & fuo_xz(k,i) * SQRT( 1.0_wp - EXP( -pi * dt_stg / tu(k) ) ) ENDIF IF ( tv(k) == 0.0_wp ) THEN fv_xz(k,i) = fvo_xz(k,i) ELSE fv_xz(k,i) = fv_xz(k,i) * EXP( -pi * dt_stg * 0.5_wp / tv(k) ) + & fvo_xz(k,i) * SQRT( 1.0_wp - EXP( -pi * dt_stg / tv(k) ) ) ENDIF IF ( tw(k) == 0.0_wp ) THEN fw_xz(k,i) = fwo_xz(k,i) ELSE fw_xz(k,i) = fw_xz(k,i) * EXP( -pi * dt_stg * 0.5_wp / tw(k) ) + & fwo_xz(k,i) * SQRT( 1.0_wp - EXP( -pi * dt_stg / tw(k) ) ) ENDIF ENDDO ENDDO dist_xz(nzb,:,1) = 0.0_wp dist_xz(nzb,:,2) = 0.0_wp dist_xz(nzb,:,3) = 0.0_wp IF ( myidy == id_stg_south ) j = nys IF ( myidy == id_stg_north ) j = nyn+1 DO i = nxl, nxr DO k = nzb+1, nzt + 1 ! !-- Lund rotation following Eq. 17 in Xie and Castro (2008). !-- Additional factors are added to improve the variance of v and w !experimental test of 1.2 dist_xz(k,i,2) = MIN( ( SQRT( a22(k) / MAXVAL(a22) ) & * 1.2_wp ) & * ( a21(k) * fu_xz(k,i) & + a22(k) * fv_xz(k,i) ), 3.0_wp ) * & MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,j,i), 2 ) ) ENDDO ENDDO IF ( myidy == id_stg_south ) j = nys-1 IF ( myidy == id_stg_north ) j = nyn+1 DO i = nxl, nxr DO k = nzb+1, nzt + 1 ! !-- Lund rotation following Eq. 17 in Xie and Castro (2008). !-- Additional factors are added to improve the variance of v and w dist_xz(k,i,1) = MIN( a11(k) * fu_xz(k,i), 3.0_wp ) * & MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,j,i), 1 ) ) dist_xz(k,i,3) = MIN( ( SQRT(a33(k) / MAXVAL(a33) ) & * 1.3_wp ) & * ( a31(k) * fu_xz(k,i) & + a32(k) * fv_xz(k,i) & + a33(k) * fw_xz(k,i) ), 3.0_wp ) * & MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,j,i), 3 ) ) ENDDO ENDDO ENDIF ! !-- Mass flux correction following Kim et al. (2013) !-- This correction factor insures that the mass flux is preserved at the !-- inflow boundary. First, calculate mean value of the imposed !-- perturbations at yz boundary. !-- Note, this needs to be done only after the last RK3-substep, else !-- the boundary values won't be accessed. IF ( intermediate_timestep_count == intermediate_timestep_count_max ) THEN mc_factor_l = 0.0_wp mc_factor = 0.0_wp IF ( myidy == id_stg_south ) j = nys IF ( myidy == id_stg_north ) j = nyn+1 mc_factor_l(2) = SUM( dist_xz(nzb:nzt,nxl:nxr,2) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(nzb:nzt,j,nxl:nxr), 2 ) ) ) IF ( myidy == id_stg_south ) j = nys-1 IF ( myidy == id_stg_north ) j = nyn+1 mc_factor_l(1) = SUM( dist_xz(nzb:nzt,nxlu:nxr,1) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(nzb:nzt,j,nxlu:nxr), 1 ) ) ) mc_factor_l(3) = SUM( dist_xz(nzb:nzt,nxl:nxr,3) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(nzb:nzt,j,nxl:nxr), 3 ) ) ) #if defined( __parallel ) CALL MPI_ALLREDUCE( mc_factor_l, mc_factor, & 3, MPI_REAL, MPI_SUM, comm1dx, ierr ) #else mc_factor = mc_factor_l #endif mc_factor = mc_factor / REAL( nr_non_topo_xz, KIND = wp ) IF ( myidy == id_stg_south ) j = nys IF ( myidy == id_stg_north ) j = nyn+1 dist_xz(:,nxl:nxr,2) = ( dist_xz(:,nxl:nxr,2) - mc_factor(2) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(:,j,nxl:nxr), 2 ) ) IF ( myidy == id_stg_south ) j = nys-1 IF ( myidy == id_stg_north ) j = nyn+1 dist_xz(:,nxl:nxr,1) = ( dist_xz(:,nxl:nxr,1) - mc_factor(1) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(:,j,nxl:nxr), 1 ) ) dist_xz(:,nxl:nxr,3) = ( dist_xz(:,nxl:nxr,3) - mc_factor(3) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(:,j,nxl:nxr), 3 ) ) ! !-- Add disturbances IF ( myidy == id_stg_south ) THEN DO i = nxl, nxr DO k = nzb+1, nzt u(k,-1,i) = ( u(k,-1,i) + dist_xz(k,i,1) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,-1,i), 1 ) ) v(k,0,i) = ( v(k,0,i) + dist_xz(k,i,2) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,0,i), 2 ) ) v(k,-1,i) = v(k,0,i) w(k,-1,i) = ( w(k,-1,i) + dist_xz(k,i,3) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,-1,i), 3 ) ) ENDDO ENDDO ENDIF IF ( myidy == id_stg_north ) THEN DO i = nxl, nxr DO k = nzb+1, nzt u(k,nyn+1,i) = ( u(k,nyn+1,i) + dist_xz(k,i,1) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,nyn+1,i), 1 ) ) v(k,nyn+1,i) = ( v(k,nyn+1,i) + dist_xz(k,i,2) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,nyn+1,i), 2 ) ) w(k,nyn+1,i) = ( w(k,nyn+1,i) + dist_xz(k,i,3) ) & * MERGE( 1.0_wp, 0.0_wp, & BTEST( wall_flags_total_0(k,nyn+1,i), 3 ) ) ENDDO ENDDO ENDIF ENDIF ENDIF ! !-- Exchange ghost points. CALL exchange_horiz( u, nbgp ) CALL exchange_horiz( v, nbgp ) CALL exchange_horiz( w, nbgp ) ! !-- Finally, set time counter for calling STG to zero IF ( stg_call ) time_stg_call = 0.0_wp IF ( debug_output_timestep ) CALL debug_message( 'stg_main', 'end' ) END SUBROUTINE stg_main !------------------------------------------------------------------------------! ! Description: ! ------------ !> Generate a set of random number rand_it wich is equal on each PE !> and calculate the velocity seed f_n. !> f_n is splitted in vertical direction by the number of PEs in x-direction and !> and each PE calculates a vertical subsection of f_n. At the the end, all !> parts are collected to form the full array. !------------------------------------------------------------------------------! SUBROUTINE stg_generate_seed_yz( n_y, n_z, b_y, b_z, f_n, id_left, id_right ) INTEGER(iwp) :: id_left !< core ids at respective boundaries INTEGER(iwp), OPTIONAL :: id_right !< core ids at respective boundaries INTEGER(iwp) :: j !< loop index in y-direction INTEGER(iwp) :: jj !< loop index in y-direction INTEGER(iwp) :: k !< loop index in z-direction INTEGER(iwp) :: kk !< loop index in z-direction INTEGER(iwp) :: send_count !< send count for MPI_GATHERV INTEGER(iwp), DIMENSION(nzb:nzt+1) :: n_y !< length scale in y-direction INTEGER(iwp), DIMENSION(nzb:nzt+1) :: n_z !< length scale in z-direction REAL(wp) :: nyz_inv !< inverse of number of grid points in yz-slice REAL(wp) :: rand_av !< average of random number REAL(wp) :: rand_sigma_inv !< inverse of stdev of random number REAL(wp), DIMENSION(-mergp:mergp,nzb:nzt+1) :: b_y !< filter function in y-direction REAL(wp), DIMENSION(-mergp:mergp,nzb:nzt+1) :: b_z !< filter function in z-direction REAL(wp), DIMENSION(nzb_x_stg:nzt_x_stg+1,nys:nyn) :: f_n_l !< local velocity seed REAL(wp), DIMENSION(nzb:nzt+1,nys:nyn) :: f_n !< velocity seed REAL(wp), DIMENSION(:,:), ALLOCATABLE :: rand_it !< global array of random numbers ! !-- Generate random numbers using the parallel random generator. !-- The set of random numbers are modified to have an average of 0 and !-- unit variance. Note, at the end the random number array must be defined !-- globally in order to compute the correlation matrices. However, !-- the calculation and normalization of random numbers is done locally, !-- while the result is later distributed to all processes. Further, !-- please note, a set of random numbers is only calculated for the !-- left boundary, while the right boundary uses the same random numbers !-- and thus also computes the same correlation matrix. ALLOCATE( rand_it(nzb-mergp:nzt+1+mergp,-mergp+nys:nyn+mergp) ) rand_it = 0.0_wp rand_av = 0.0_wp rand_sigma_inv = 0.0_wp nyz_inv = 1.0_wp / REAL( ( nzt + 1 + mergp - ( nzb - mergp ) + 1 ) & * ( ny + mergp - ( 0 - mergp ) + 1 ), & KIND=wp ) ! !-- Compute and normalize random numbers. DO j = nys - mergp, nyn + mergp ! !-- Put the random seeds at grid point j CALL random_seed_parallel( put=seq_rand_yz(:,j) ) DO k = nzb - mergp, nzt + 1 + mergp CALL random_number_parallel( random_dummy ) rand_it(k,j) = random_dummy ENDDO ! !-- Get the new random seeds from last call at grid point j CALL random_seed_parallel( get=seq_rand_yz(:,j) ) ENDDO ! !-- For normalization to zero mean, sum-up the global random numers. !-- To normalize the global set of random numbers, !-- the inner ghost layers mergp must not be summed-up, else !-- the random numbers on the ghost layers will be stronger weighted as they !-- also occur on the inner subdomains. DO j = MERGE( nys, nys - mergp, nys /= 0 ), & MERGE( nyn, nyn + mergp, nyn /= ny ) DO k = nzb - mergp, nzt + 1 + mergp rand_av = rand_av + rand_it(k,j) ENDDO ENDDO #if defined( __parallel ) ! !-- Sum-up the local averages of the random numbers CALL MPI_ALLREDUCE( MPI_IN_PLACE, rand_av, 1, MPI_REAL, & MPI_SUM, comm1dy, ierr ) #endif rand_av = rand_av * nyz_inv ! !-- Obtain zero mean rand_it= rand_it - rand_av ! !-- Now, compute the variance DO j = MERGE( nys, nys - mergp, nys /= 0 ), & MERGE( nyn, nyn + mergp, nyn /= ny ) DO k = nzb - mergp, nzt + 1 + mergp rand_sigma_inv = rand_sigma_inv + rand_it(k,j)**2 ENDDO ENDDO #if defined( __parallel ) ! !-- Sum-up the local quadratic averages of the random numbers CALL MPI_ALLREDUCE( MPI_IN_PLACE, rand_sigma_inv, 1, MPI_REAL, & MPI_SUM, comm1dy, ierr ) #endif ! !-- Compute standard deviation IF ( rand_sigma_inv /= 0.0_wp ) THEN rand_sigma_inv = 1.0_wp / SQRT( rand_sigma_inv * nyz_inv ) ELSE rand_sigma_inv = 1.0_wp ENDIF ! !-- Normalize with standard deviation to obtain unit variance rand_it = rand_it * rand_sigma_inv CALL cpu_log( log_point_s(31), 'STG f_n factors', 'start' ) ! !-- Generate velocity seed following Eq.6 of Xie and Castro (2008). There !-- are two options. In the first one, the computation of the seeds is !-- distributed to all processes along the communicator comm1dy and !-- gathered on the leftmost and, if necessary, on the rightmost process. !-- For huge length scales the computational effort can become quite huge !-- (it scales with the turbulent length scales), so that gain by parallelization !-- exceeds the costs by the subsequent communication. !-- In the second option, which performs better when the turbulent length scales !-- are parametrized and thus the loops are smaller, the seeds are computed !-- locally and no communication is necessary. IF ( compute_velocity_seeds_local ) THEN f_n = 0.0_wp DO j = nys, nyn DO k = nzb, nzt+1 DO jj = -n_y(k), n_y(k) DO kk = -n_z(k), n_z(k) f_n(k,j) = f_n(k,j) + b_y(jj,k) * b_z(kk,k) * rand_it(k+kk,j+jj) ENDDO ENDDO ENDDO ENDDO ELSE f_n_l = 0.0_wp DO j = nys, nyn DO k = nzb_x_stg, nzt_x_stg+1 DO jj = -n_y(k), n_y(k) DO kk = -n_z(k), n_z(k) f_n_l(k,j) = f_n_l(k,j) + b_y(jj,k) * b_z(kk,k) * rand_it(k+kk,j+jj) ENDDO ENDDO ENDDO ENDDO ! !-- Gather velocity seeds of full subdomain send_count = nzt_x_stg - nzb_x_stg + 1 IF ( nzt_x_stg == nzt ) send_count = send_count + 1 #if defined( __parallel ) ! !-- Gather the velocity seed matrix on left boundary mpi ranks. CALL MPI_GATHERV( f_n_l(nzb_x_stg,nys), send_count, stg_type_yz_small, & f_n(nzb+1,nys), recv_count_yz, displs_yz, stg_type_yz,& id_left, comm1dx, ierr ) ! !-- If required, gather the same velocity seed matrix on right boundary !-- mpi ranks (in offline nesting for example). IF ( PRESENT( id_right ) ) THEN CALL MPI_GATHERV( f_n_l(nzb_x_stg,nys), send_count, stg_type_yz_small, & f_n(nzb+1,nys), recv_count_yz, displs_yz, stg_type_yz,& id_right, comm1dx, ierr ) ENDIF #else f_n(nzb+1:nzt+1,nys:nyn) = f_n_l(nzb_x_stg:nzt_x_stg+1,nys:nyn) ! !-- Next line required to avoid compile errors because of unused dummy arguments IF ( id_left == 0 ) id_right = 0 #endif ENDIF DEALLOCATE( rand_it ) CALL cpu_log( log_point_s(31), 'STG f_n factors', 'stop' ) END SUBROUTINE stg_generate_seed_yz !------------------------------------------------------------------------------! ! Description: ! ------------ !> Generate a set of random number rand_it wich is equal on each PE !> and calculate the velocity seed f_n. !> f_n is splitted in vertical direction by the number of PEs in y-direction and !> and each PE calculates a vertical subsection of f_n. At the the end, all !> parts are collected to form the full array. !------------------------------------------------------------------------------! SUBROUTINE stg_generate_seed_xz( n_x, n_z, b_x, b_z, f_n, id_south, id_north ) INTEGER(iwp) :: i !< loop index in x-direction INTEGER(iwp) :: id_north !< core ids at respective boundaries INTEGER(iwp) :: id_south !< core ids at respective boundaries INTEGER(iwp) :: ii !< loop index in x-direction INTEGER(iwp) :: k !< loop index in z-direction INTEGER(iwp) :: kk !< loop index in z-direction INTEGER(iwp) :: send_count !< send count for MPI_GATHERV INTEGER(iwp), DIMENSION(nzb:nzt+1) :: n_x !< length scale in x-direction INTEGER(iwp), DIMENSION(nzb:nzt+1) :: n_z !< length scale in z-direction REAL(wp) :: nxz_inv !< inverse of number of grid points in xz-slice REAL(wp) :: rand_av !< average of random number REAL(wp) :: rand_sigma_inv !< inverse of stdev of random number REAL(wp), DIMENSION(-mergp:mergp,nzb:nzt+1) :: b_x !< filter function in x-direction REAL(wp), DIMENSION(-mergp:mergp,nzb:nzt+1) :: b_z !< filter function in z-direction REAL(wp), DIMENSION(nzb_y_stg:nzt_y_stg+1,nxl:nxr) :: f_n_l !< local velocity seed REAL(wp), DIMENSION(nzb:nzt+1,nxl:nxr) :: f_n !< velocity seed REAL(wp), DIMENSION(:,:), ALLOCATABLE :: rand_it !< global array of random numbers ! !-- Generate random numbers using the parallel random generator. !-- The set of random numbers are modified to have an average of 0 and !-- unit variance. Note, at the end the random number array must be defined !-- globally in order to compute the correlation matrices. However, !-- the calculation and normalization of random numbers is done locally, !-- while the result is later distributed to all processes. Further, !-- please note, a set of random numbers is only calculated for the !-- left boundary, while the right boundary uses the same random numbers !-- and thus also computes the same correlation matrix. ALLOCATE( rand_it(nzb-mergp:nzt+1+mergp,-mergp+nxl:nxr+mergp) ) rand_it = 0.0_wp rand_av = 0.0_wp rand_sigma_inv = 0.0_wp nxz_inv = 1.0_wp / REAL( ( nzt + 1 + mergp - ( nzb - mergp ) + 1 ) & * ( nx + mergp - ( 0 - mergp ) +1 ), & KIND=wp ) ! !-- Compute and normalize random numbers. DO i = nxl - mergp, nxr + mergp ! !-- Put the random seeds at grid point ii CALL random_seed_parallel( put=seq_rand_xz(:,i) ) DO k = nzb - mergp, nzt + 1 + mergp CALL random_number_parallel( random_dummy ) rand_it(k,i) = random_dummy ENDDO ! !-- Get the new random seeds from last call at grid point ii CALL random_seed_parallel( get=seq_rand_xz(:,i) ) ENDDO ! !-- For normalization to zero mean, sum-up the global random numers. !-- To normalize the global set of random numbers, !-- the inner ghost layers mergp must not be summed-up, else !-- the random numbers on the ghost layers will be stronger weighted as they !-- also occur on the inner subdomains. DO i = MERGE( nxl, nxl - mergp, nxl /= 0 ), & MERGE( nxr, nxr + mergp, nxr /= nx ) DO k = nzb - mergp, nzt + 1 + mergp rand_av = rand_av + rand_it(k,i) ENDDO ENDDO #if defined( __parallel ) ! !-- Sum-up the local averages of the random numbers CALL MPI_ALLREDUCE( MPI_IN_PLACE, rand_av, 1, MPI_REAL, & MPI_SUM, comm1dx, ierr ) #endif rand_av = rand_av * nxz_inv ! !-- Obtain zero mean rand_it= rand_it - rand_av ! !-- Now, compute the variance DO i = MERGE( nxl, nxl - mergp, nxl /= 0 ), & MERGE( nxr, nxr + mergp, nxr /= nx ) DO k = nzb - mergp, nzt + 1 + mergp rand_sigma_inv = rand_sigma_inv + rand_it(k,i)**2 ENDDO ENDDO #if defined( __parallel ) ! !-- Sum-up the local quadratic averages of the random numbers CALL MPI_ALLREDUCE( MPI_IN_PLACE, rand_sigma_inv, 1, MPI_REAL, & MPI_SUM, comm1dx, ierr ) #endif ! !-- Compute standard deviation IF ( rand_sigma_inv /= 0.0_wp ) THEN rand_sigma_inv = 1.0_wp / SQRT( rand_sigma_inv * nxz_inv ) ELSE rand_sigma_inv = 1.0_wp ENDIF ! !-- Normalize with standard deviation to obtain unit variance rand_it = rand_it * rand_sigma_inv CALL cpu_log( log_point_s(31), 'STG f_n factors', 'start' ) ! !-- Generate velocity seed following Eq.6 of Xie and Castro (2008). There !-- are two options. In the first one, the computation of the seeds is !-- distributed to all processes along the communicator comm1dx and !-- gathered on the southmost and, if necessary, on the northmost process. !-- For huge length scales the computational effort can become quite huge !-- (it scales with the turbulent length scales), so that gain by parallelization !-- exceeds the costs by the subsequent communication. !-- In the second option, which performs better when the turbulent length scales !-- are parametrized and thus the loops are smaller, the seeds are computed !-- locally and no communication is necessary. IF ( compute_velocity_seeds_local ) THEN f_n = 0.0_wp DO i = nxl, nxr DO k = nzb, nzt+1 DO ii = -n_x(k), n_x(k) DO kk = -n_z(k), n_z(k) f_n(k,i) = f_n(k,i) + b_x(ii,k) * b_z(kk,k) * rand_it(k+kk,i+ii) ENDDO ENDDO ENDDO ENDDO ELSE f_n_l = 0.0_wp DO i = nxl, nxr DO k = nzb_y_stg, nzt_y_stg+1 DO ii = -n_x(k), n_x(k) DO kk = -n_z(k), n_z(k) f_n_l(k,i) = f_n_l(k,i) + b_x(ii,k) * b_z(kk,k) * rand_it(k+kk,i+ii) ENDDO ENDDO ENDDO ENDDO ! !-- Gather velocity seeds of full subdomain send_count = nzt_y_stg - nzb_y_stg + 1 IF ( nzt_y_stg == nzt ) send_count = send_count + 1 #if defined( __parallel ) ! !-- Gather the processed velocity seed on south boundary mpi ranks. CALL MPI_GATHERV( f_n_l(nzb_y_stg,nxl), send_count, stg_type_xz_small, & f_n(nzb+1,nxl), recv_count_xz, displs_xz, stg_type_xz, & id_south, comm1dy, ierr ) ! !-- Gather the processed velocity seed on north boundary mpi ranks. CALL MPI_GATHERV( f_n_l(nzb_y_stg,nxl), send_count, stg_type_xz_small, & f_n(nzb+1,nxl), recv_count_xz, displs_xz, stg_type_xz, & id_north, comm1dy, ierr ) #else f_n(nzb+1:nzt+1,nxl:nxr) = f_n_l(nzb_y_stg:nzt_y_stg+1,nxl:nxr) ! !-- Next line required to avoid compile errors because of unused dummy arguments IF ( id_north == 0 ) id_south = 0 #endif ENDIF DEALLOCATE( rand_it ) CALL cpu_log( log_point_s(31), 'STG f_n factors', 'stop' ) END SUBROUTINE stg_generate_seed_xz !------------------------------------------------------------------------------! ! Description: ! ------------ !> Parametrization of the Reynolds stress tensor, following the parametrization !> described in Rotach et al. (1996), which is applied in state-of-the-art !> dispserion modelling. Please note, the parametrization does not distinguish !> between along-wind and cross-wind turbulence. !------------------------------------------------------------------------------! SUBROUTINE parametrize_reynolds_stress INTEGER(iwp) :: k !< loop index in z-direction REAL(wp) :: zzi !< ratio of z/zi DO k = nzb+1, nzt+1 ! !-- Calculate function to gradually decrease Reynolds stress above ABL top. !-- The function decreases to 1/10 after one length scale above the !-- ABL top. blend = MIN( 1.0_wp, EXP( d_l * zu(k) - d_l * zi_ribulk ) ) ! !-- Determine normalized height coordinate zzi = zu(k) / zi_ribulk ! !-- u'u' and v'v'. Assume isotropy. Note, add a small negative number !-- to the denominator, else the mergpe-function can crash if scale_l is !-- zero. r11(k) = scale_us**2 * ( & MERGE( 0.35_wp * ABS( & - zi_ribulk / ( kappa * scale_l - 10E-4_wp ) & )**( 2.0_wp / 3.0_wp ), & 0.0_wp, & scale_l < 0.0_wp ) & + 5.0_wp - 4.0_wp * zzi & ) * blend r22(k) = r11(k) ! !-- w'w' r33(k) = scale_wm**2 * ( & 1.5_wp * zzi**( 2.0_wp / 3.0_wp ) * EXP( -2.0_wp * zzi ) & + ( 1.7_wp - zzi ) * ( scale_us / scale_wm )**2 & ) * blend ! !-- u'w' and v'w'. Assume isotropy. r31(k) = - scale_us**2 * ( 1.01_wp - MIN( zzi, 1.0_wp ) ) * blend r32(k) = r31(k) ! !-- For u'v' no parametrization exist so far - ?. For simplicity assume !-- a similar profile as for u'w'. r21(k) = r31(k) ENDDO ! !-- Set bottom boundary condition r11(nzb) = r11(nzb+1) r22(nzb) = r22(nzb+1) r33(nzb) = r33(nzb+1) r21(nzb) = r11(nzb+1) r31(nzb) = r31(nzb+1) r32(nzb) = r32(nzb+1) END SUBROUTINE parametrize_reynolds_stress !------------------------------------------------------------------------------! ! Description: ! ------------ !> Calculate the coefficient matrix from the Lund rotation. !------------------------------------------------------------------------------! SUBROUTINE calc_coeff_matrix INTEGER(iwp) :: k !< loop index in z-direction ! !-- Calculate coefficient matrix. Split loops to allow for loop vectorization. DO k = nzb+1, nzt+1 IF ( r11(k) > 10E-6_wp ) THEN a11(k) = SQRT( r11(k) ) a21(k) = r21(k) / a11(k) a31(k) = r31(k) / a11(k) ELSE a11(k) = 10E-8_wp a21(k) = 10E-8_wp a31(k) = 10E-8_wp ENDIF ENDDO DO k = nzb+1, nzt+1 a22(k) = r22(k) - a21(k)**2 IF ( a22(k) > 10E-6_wp ) THEN a22(k) = SQRT( a22(k) ) a32(k) = r32(k) - a21(k) * a31(k) / a22(k) ELSE a22(k) = 10E-8_wp a32(k) = 10E-8_wp ENDIF ENDDO DO k = nzb+1, nzt+1 a33(k) = r33(k) - a31(k)**2 - a32(k)**2 IF ( a33(k) > 10E-6_wp ) THEN a33(k) = SQRT( a33(k) ) ELSE a33(k) = 10E-8_wp ENDIF ENDDO ! !-- Set bottom boundary condition a11(nzb) = a11(nzb+1) a22(nzb) = a22(nzb+1) a21(nzb) = a21(nzb+1) a33(nzb) = a33(nzb+1) a31(nzb) = a31(nzb+1) a32(nzb) = a32(nzb+1) END SUBROUTINE calc_coeff_matrix !------------------------------------------------------------------------------! ! Description: ! ------------ !> This routine controls the re-adjustment of the turbulence statistics used !> for generating turbulence at the lateral boundaries. !------------------------------------------------------------------------------! SUBROUTINE stg_adjust IF ( debug_output_timestep ) CALL debug_message( 'stg_adjust', 'start' ) ! !-- In case of dirichlet inflow boundary conditions only at one lateral !-- boundary, i.e. in the case no offline or self nesting is applied but !-- synthetic turbulence shall be parametrized nevertheless, the !-- boundary-layer depth need to determined first. IF ( .NOT. nesting_offline .AND. .NOT. child_domain ) & CALL nesting_offl_calc_zi ! !-- Compute scaling parameters (domain-averaged), such as friction velocity !-- are calculated. CALL calc_scaling_variables ! !-- Set length and time scales depending on boundary-layer height CALL calc_length_and_time_scale ! !-- Parametrize Reynolds-stress tensor, diagonal elements as well !-- as r21 (v'u'), r31 (w'u'), r32 (w'v'). Parametrization follows !-- Rotach et al. (1996) and is based on boundary-layer depth, !-- friction velocity and velocity scale. CALL parametrize_reynolds_stress ! !-- Calculate coefficient matrix from Reynolds stress tensor !-- (Lund rotation) CALL calc_coeff_matrix ! !-- Determine filter functions on basis of updated length scales CALL stg_filter_func( nux, bux ) !filter ux CALL stg_filter_func( nuy, buy ) !filter uy CALL stg_filter_func( nuz, buz ) !filter uz CALL stg_filter_func( nvx, bvx ) !filter vx CALL stg_filter_func( nvy, bvy ) !filter vy CALL stg_filter_func( nvz, bvz ) !filter vz CALL stg_filter_func( nwx, bwx ) !filter wx CALL stg_filter_func( nwy, bwy ) !filter wy CALL stg_filter_func( nwz, bwz ) !filter wz ! !-- Reset time counter for controlling next adjustment to zero time_stg_adjust = 0.0_wp IF ( debug_output_timestep ) CALL debug_message( 'stg_adjust', 'end' ) END SUBROUTINE stg_adjust !------------------------------------------------------------------------------! ! Description: ! ------------ !> Calculates turbuluent length and time scales if these are not available !> from measurements. !------------------------------------------------------------------------------! SUBROUTINE calc_length_and_time_scale INTEGER(iwp) :: k !< loop index in z-direction REAL(wp) :: length_scale_dum !< effectively used length scale ! !-- In initial call the boundary-layer depth can be zero. This case, set !-- minimum value for boundary-layer depth, to setup length scales correctly. zi_ribulk = MAX( zi_ribulk, zw(nzb+2) ) ! !-- Set-up default turbulent length scales. From the numerical point of !-- view the imposed perturbations should not be immediately dissipated !-- by the numerics. The numerical dissipation, however, acts on scales !-- up to 8 x the grid spacing. For this reason, set the turbulence !-- length scale to 8 time the grid spacing. Further, above the boundary !-- layer height, set turbulence lenght scales to zero (equivalent to not !-- imposing any perturbations) in order to save computational costs. !-- Typical time scales are derived by assuming Taylors's hypothesis, !-- using the length scales and the mean profiles of u- and v-component. DO k = nzb+1, nzt+1 ! !-- Determine blending parameter. Within the boundary layer length scales !-- are constant, while above lengths scales approach gradully zero, !-- i.e. imposed turbulence is not correlated in space and time, !-- just white noise, which saves computations power as the loops for the !-- computation of the filter functions depend on the length scales. !-- The value decreases to 1/10 after one length scale above the !-- ABL top. blend = MIN( 1.0_wp, EXP( d_l * zu(k) - d_l * zi_ribulk ) ) ! !-- Assume isotropic turbulence length scales nux(k) = MAX( INT( length_scale * ddx ), 1 ) * blend nuy(k) = MAX( INT( length_scale * ddy ), 1 ) * blend nvx(k) = MAX( INT( length_scale * ddx ), 1 ) * blend nvy(k) = MAX( INT( length_scale * ddy ), 1 ) * blend nwx(k) = MAX( INT( length_scale * ddx ), 1 ) * blend nwy(k) = MAX( INT( length_scale * ddy ), 1 ) * blend ! !-- Along the vertical direction limit the length scale further by the !-- boundary-layer depth to assure that no length scales larger than !-- the boundary-layer depth are used length_scale_dum = MIN( length_scale, zi_ribulk ) nuz(k) = MAX( INT( length_scale_dum * ddzw(k) ), 1 ) * blend nvz(k) = MAX( INT( length_scale_dum * ddzw(k) ), 1 ) * blend nwz(k) = MAX( INT( length_scale_dum * ddzw(k) ), 1 ) * blend ! !-- Limit time scales, else they become very larger for low wind speed, !-- imposing long-living inflow perturbations which in turn propagate !-- further into the model domain. Use u_init and v_init to calculate !-- the time scales, which will be equal to the inflow profiles, both, !-- in offline nesting mode or in dirichlet/radiation mode. tu(k) = MIN( dt_stg_adjust, length_scale / & ( ABS( u_init(k) ) + 0.1_wp ) ) * blend tv(k) = MIN( dt_stg_adjust, length_scale / & ( ABS( v_init(k) ) + 0.1_wp ) ) * blend ! !-- Time scale of w-component is a mixture from u- and v-component. tw(k) = SQRT( tu(k)**2 + tv(k)**2 ) * blend ENDDO ! !-- Set bottom boundary condition for the length and time scales nux(nzb) = nux(nzb+1) nuy(nzb) = nuy(nzb+1) nuz(nzb) = nuz(nzb+1) nvx(nzb) = nvx(nzb+1) nvy(nzb) = nvy(nzb+1) nvz(nzb) = nvz(nzb+1) nwx(nzb) = nwx(nzb+1) nwy(nzb) = nwy(nzb+1) nwz(nzb) = nwz(nzb+1) tu(nzb) = tu(nzb+1) tv(nzb) = tv(nzb+1) tw(nzb) = tw(nzb+1) END SUBROUTINE calc_length_and_time_scale !------------------------------------------------------------------------------! ! Description: ! ------------ !> Calculate scaling variables which are used for turbulence parametrization !> according to Rotach et al. (1996). Scaling variables are: friction velocity, !> boundary-layer depth, momentum velocity scale, and Obukhov length. !------------------------------------------------------------------------------! SUBROUTINE calc_scaling_variables INTEGER(iwp) :: i !< loop index in x-direction INTEGER(iwp) :: j !< loop index in y-direction INTEGER(iwp) :: k !< loop index in z-direction INTEGER(iwp) :: m !< surface element index REAL(wp) :: friction_vel_l !< mean friction veloctiy on subdomain REAL(wp) :: pt_surf_mean !< mean near surface temperature (at 1st grid point) REAL(wp) :: pt_surf_mean_l !< mean near surface temperature (at 1st grid point) on subdomain REAL(wp) :: scale_l_l !< mean Obukhov lenght on subdomain REAL(wp) :: shf_mean !< mean surface sensible heat flux REAL(wp) :: shf_mean_l !< mean surface sensible heat flux on subdomain REAL(wp) :: w_convective !< convective velocity scale ! !-- Calculate mean friction velocity, velocity scale, heat flux and !-- near-surface temperature in the model domain. pt_surf_mean_l = 0.0_wp shf_mean_l = 0.0_wp scale_l_l = 0.0_wp friction_vel_l = 0.0_wp DO m = 1, surf_def_h(0)%ns i = surf_def_h(0)%i(m) j = surf_def_h(0)%j(m) k = surf_def_h(0)%k(m) friction_vel_l = friction_vel_l + surf_def_h(0)%us(m) shf_mean_l = shf_mean_l + surf_def_h(0)%shf(m) * drho_air(k) scale_l_l = scale_l_l + surf_def_h(0)%ol(m) pt_surf_mean_l = pt_surf_mean_l + pt(k,j,i) ENDDO DO m = 1, surf_lsm_h%ns i = surf_lsm_h%i(m) j = surf_lsm_h%j(m) k = surf_lsm_h%k(m) friction_vel_l = friction_vel_l + surf_lsm_h%us(m) shf_mean_l = shf_mean_l + surf_lsm_h%shf(m) * drho_air(k) scale_l_l = scale_l_l + surf_lsm_h%ol(m) pt_surf_mean_l = pt_surf_mean_l + pt(k,j,i) ENDDO DO m = 1, surf_usm_h%ns i = surf_usm_h%i(m) j = surf_usm_h%j(m) k = surf_usm_h%k(m) friction_vel_l = friction_vel_l + surf_usm_h%us(m) shf_mean_l = shf_mean_l + surf_usm_h%shf(m) * drho_air(k) scale_l_l = scale_l_l + surf_usm_h%ol(m) pt_surf_mean_l = pt_surf_mean_l + pt(k,j,i) ENDDO #if defined( __parallel ) CALL MPI_ALLREDUCE( friction_vel_l, scale_us, 1, MPI_REAL, MPI_SUM, & comm2d, ierr ) CALL MPI_ALLREDUCE( shf_mean_l, shf_mean, 1, MPI_REAL, MPI_SUM, & comm2d, ierr ) CALL MPI_ALLREDUCE( scale_l_l, scale_l, 1, MPI_REAL, MPI_SUM, & comm2d, ierr ) CALL MPI_ALLREDUCE( pt_surf_mean_l, pt_surf_mean, 1, MPI_REAL, MPI_SUM, & comm2d, ierr ) #else scale_us = friction_vel_l shf_mean = shf_mean_l scale_l = scale_l_l pt_surf_mean = pt_surf_mean_l #endif scale_us = scale_us / REAL( ( nx + 1 ) * ( ny + 1 ), KIND = wp ) shf_mean = shf_mean / REAL( ( nx + 1 ) * ( ny + 1 ), KIND = wp ) scale_l = scale_l / REAL( ( nx + 1 ) * ( ny + 1 ), KIND = wp ) pt_surf_mean = pt_surf_mean / REAL( ( nx + 1 ) * ( ny + 1 ), KIND = wp ) ! !-- Compute mean convective velocity scale. Note, in case the mean heat flux !-- is negative, set convective velocity scale to zero. IF ( shf_mean > 0.0_wp ) THEN w_convective = ( g * shf_mean * zi_ribulk / pt_surf_mean )**( 1.0_wp / 3.0_wp ) ELSE w_convective = 0.0_wp ENDIF ! !-- Finally, in order to consider also neutral or stable stratification, !-- compute momentum velocity scale from u* and convective velocity scale, !-- according to Rotach et al. (1996). scale_wm = ( scale_us**3 + 0.6_wp * w_convective**3 )**( 1.0_wp / 3.0_wp ) END SUBROUTINE calc_scaling_variables END MODULE synthetic_turbulence_generator_mod