[2259] | 1 | !> @synthetic_turbulence_generator_mod.f90 |
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| 2 | !------------------------------------------------------------------------------! |
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| 3 | ! This file is part of PALM-4U. |
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| 4 | ! |
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| 5 | ! PALM-4U is free software: you can redistribute it and/or modify it under the |
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| 6 | ! terms of the GNU General Public License as published by the Free Software |
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| 7 | ! Foundation, either version 3 of the License, or (at your option) any later |
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| 8 | ! version. |
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| 9 | ! |
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| 10 | ! PALM-4U is distributed in the hope that it will be useful, but WITHOUT ANY |
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| 11 | ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
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| 12 | ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
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| 13 | ! |
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| 14 | ! You should have received a copy of the GNU General Public License along with |
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| 15 | ! PALM. If not, see <http://www.gnu.org/licenses/>. |
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| 16 | ! |
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| 17 | ! Copyright 2017 Leibniz Universitaet Hannover |
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| 18 | !------------------------------------------------------------------------------! |
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| 19 | ! |
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| 20 | ! Current revisions: |
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| 21 | ! ----------------- |
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| 22 | ! |
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| 23 | ! |
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| 24 | ! Former revisions: |
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| 25 | ! ----------------- |
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| 26 | ! $Id: synthetic_turbulence_generator_mod.f90 2259 2017-06-08 09:09:11Z gronemeier $ |
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| 27 | ! Initial revision |
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| 28 | ! |
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| 29 | ! |
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| 30 | ! |
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| 31 | ! Authors: |
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| 32 | ! -------- |
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| 33 | ! @author Tobias Gronemeier, Atsushi Inagaki, Micha Gryschka, Christoph Knigge |
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| 34 | ! |
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| 35 | ! |
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| 36 | ! Description: |
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| 37 | ! ------------ |
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| 38 | !> The module generates turbulence at the inflow boundary based on a method by |
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| 39 | !> Xie and Castro (2008) utilizing a Lund rotation (Lund, 1998) and a mass-flux |
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| 40 | !> correction by Kim et al. (2013). |
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| 41 | !> The turbulence is correlated based on length scales in y- and z-direction and |
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| 42 | !> a time scale for each velocity component. The profiles of length and time |
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| 43 | !> scales, mean u, v, w, e and pt, and all components of the Reynolds stress |
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| 44 | !> tensor are read from file STG_PROFILES. |
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| 45 | !> |
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| 46 | !> @todo test restart |
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| 47 | !> enable cyclic_fill |
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| 48 | !> implement turbulence generation for e and pt |
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| 49 | !> @note <Enter notes on the module> |
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| 50 | !> @bug Height information from input file is not used. Profiles from input |
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| 51 | !> must match with current PALM grid. |
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| 52 | !> Transformation of length scales to number of gridpoints does not |
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| 53 | !> consider grid stretching. |
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| 54 | !> In case of restart, velocity seeds differ from precursor run if a11, |
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| 55 | !> a22, or a33 are zero. |
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| 56 | !------------------------------------------------------------------------------! |
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| 57 | MODULE synthetic_turbulence_generator_mod |
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| 58 | |
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| 59 | |
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| 60 | USE arrays_3d, & |
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| 61 | ONLY: mean_inflow_profiles, u, v, w |
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| 62 | |
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| 63 | USE constants, & |
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| 64 | ONLY: pi |
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| 65 | |
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| 66 | USE control_parameters, & |
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| 67 | ONLY: initializing_actions, message_string, & |
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| 68 | synthetic_turbulence_generator |
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| 69 | |
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| 70 | USE cpulog, & |
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| 71 | ONLY: cpu_log, log_point, log_point_s |
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| 72 | |
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| 73 | USE indices, & |
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| 74 | ONLY: nbgp, nzb, nzt, nyng, nysg |
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| 75 | |
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| 76 | USE kinds |
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| 77 | |
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| 78 | USE MPI |
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| 79 | |
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| 80 | USE pegrid, & |
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| 81 | ONLY: comm1dx, comm1dy, comm2d, id_inflow, ierr, myidx, pdims |
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| 82 | |
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| 83 | USE transpose_indices, & |
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| 84 | ONLY: nzb_x, nzt_x |
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| 85 | |
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| 86 | |
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| 87 | IMPLICIT NONE |
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| 88 | |
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| 89 | LOGICAL :: velocity_seed_initialized = .FALSE. !< true after first call of stg_main |
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| 90 | LOGICAL :: use_synthetic_turbulence_generator = .FALSE. !< switch to use synthetic turbulence generator |
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| 91 | |
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| 92 | INTEGER(iwp) :: stg_type_yz !< MPI type for full z range |
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| 93 | INTEGER(iwp) :: stg_type_yz_small !< MPI type for small z range |
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| 94 | INTEGER(iwp) :: merg !< maximum length scale (in gp) |
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| 95 | INTEGER(iwp) :: mergp !< merg + nbgp |
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| 96 | |
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| 97 | REAL(wp) :: mc_factor !< mass flux correction factor |
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| 98 | |
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| 99 | INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: displs !< displacement for MPI_GATHERV |
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| 100 | INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: recv_count !< receive count for MPI_GATHERV |
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| 101 | INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nuy !< length scale of u in y direction (in gp) |
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| 102 | INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nuz !< length scale of u in z direction (in gp) |
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| 103 | INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nvy !< length scale of v in y direction (in gp) |
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| 104 | INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nvz !< length scale of v in z direction (in gp) |
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| 105 | INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nwy !< length scale of w in y direction (in gp) |
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| 106 | INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nwz !< length scale of w in z direction (in gp) |
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| 107 | |
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| 108 | INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: seed !< seed of random number for rn-generator |
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| 109 | |
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| 110 | REAL(wp), DIMENSION(:), ALLOCATABLE :: a11 !< coefficient for Lund rotation |
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| 111 | REAL(wp), DIMENSION(:), ALLOCATABLE :: a21 !< coefficient for Lund rotation |
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| 112 | REAL(wp), DIMENSION(:), ALLOCATABLE :: a22 !< coefficient for Lund rotation |
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| 113 | REAL(wp), DIMENSION(:), ALLOCATABLE :: a31 !< coefficient for Lund rotation |
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| 114 | REAL(wp), DIMENSION(:), ALLOCATABLE :: a32 !< coefficient for Lund rotation |
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| 115 | REAL(wp), DIMENSION(:), ALLOCATABLE :: a33 !< coefficient for Lund rotation |
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| 116 | REAL(wp), DIMENSION(:), ALLOCATABLE :: tu !< Lagrangian time scale of u |
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| 117 | REAL(wp), DIMENSION(:), ALLOCATABLE :: tv !< Lagrangian time scale of v |
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| 118 | REAL(wp), DIMENSION(:), ALLOCATABLE :: tw !< Lagrangian time scale of w |
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| 119 | |
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| 120 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: buy !< filter function for u in y direction |
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| 121 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: buz !< filter function for u in z direction |
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| 122 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: bvy !< filter function for v in y direction |
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| 123 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: bvz !< filter function for v in z direction |
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| 124 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: bwy !< filter function for w in y direction |
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| 125 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: bwz !< filter function for w in z direction |
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| 126 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fu !< velocity seed for u |
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| 127 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fuo !< velocity seed for u with new random number |
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| 128 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fv !< velocity seed for v |
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| 129 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fvo !< velocity seed for v with new random number |
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| 130 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fw !< velocity seed for w |
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| 131 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fwo !< velocity seed for w with new random number |
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| 132 | |
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| 133 | |
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| 134 | ! |
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| 135 | !-- PALM interfaces: |
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| 136 | !-- Input parameter checks to be done in check_parameters |
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| 137 | INTERFACE stg_check_parameters |
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| 138 | MODULE PROCEDURE stg_check_parameters |
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| 139 | END INTERFACE stg_check_parameters |
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| 140 | |
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| 141 | ! |
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| 142 | !-- Calculate filter functions |
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| 143 | INTERFACE stg_filter_func |
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| 144 | MODULE PROCEDURE stg_filter_func |
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| 145 | END INTERFACE stg_filter_func |
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| 146 | |
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| 147 | ! |
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| 148 | !-- Generate velocity seeds |
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| 149 | INTERFACE stg_generate_seed_yz |
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| 150 | MODULE PROCEDURE stg_generate_seed_yz |
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| 151 | END INTERFACE stg_generate_seed_yz |
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| 152 | |
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| 153 | ! |
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| 154 | !-- Output of information to the header file |
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| 155 | INTERFACE stg_header |
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| 156 | MODULE PROCEDURE stg_header |
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| 157 | END INTERFACE stg_header |
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| 158 | |
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| 159 | ! |
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| 160 | !-- Initialization actions |
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| 161 | INTERFACE stg_init |
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| 162 | MODULE PROCEDURE stg_init |
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| 163 | END INTERFACE stg_init |
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| 164 | |
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| 165 | ! |
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| 166 | !-- Main procedure of synth. turb. gen. |
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| 167 | INTERFACE stg_main |
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| 168 | MODULE PROCEDURE stg_main |
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| 169 | END INTERFACE stg_main |
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| 170 | |
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| 171 | ! |
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| 172 | !-- Reading of NAMELIST parameters |
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| 173 | INTERFACE stg_parin |
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| 174 | MODULE PROCEDURE stg_parin |
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| 175 | END INTERFACE stg_parin |
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| 176 | |
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| 177 | ! |
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| 178 | !-- Reading of parameters for restart runs |
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| 179 | INTERFACE stg_read_restart_data |
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| 180 | MODULE PROCEDURE stg_read_restart_data |
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| 181 | END INTERFACE stg_read_restart_data |
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| 182 | |
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| 183 | ! |
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| 184 | !-- Writing of binary output for restart runs |
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| 185 | INTERFACE stg_write_restart_data |
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| 186 | MODULE PROCEDURE stg_write_restart_data |
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| 187 | END INTERFACE stg_write_restart_data |
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| 188 | |
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| 189 | SAVE |
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| 190 | |
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| 191 | PRIVATE |
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| 192 | |
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| 193 | ! |
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| 194 | !-- Public interfaces |
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| 195 | PUBLIC stg_check_parameters, stg_header, stg_init, stg_main, stg_parin, & |
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| 196 | stg_read_restart_data, stg_write_restart_data |
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| 197 | |
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| 198 | ! |
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| 199 | !-- Public variables |
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| 200 | PUBLIC use_synthetic_turbulence_generator |
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| 201 | |
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| 202 | |
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| 203 | CONTAINS |
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| 204 | |
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| 205 | |
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| 206 | !------------------------------------------------------------------------------! |
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| 207 | ! Description: |
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| 208 | ! ------------ |
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| 209 | !> Check parameters routine for synthetic turbulence generator |
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| 210 | !------------------------------------------------------------------------------! |
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| 211 | SUBROUTINE stg_check_parameters |
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| 212 | |
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| 213 | |
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| 214 | USE control_parameters, & |
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| 215 | ONLY: bc_lr, bc_ns, turbulent_inflow |
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| 216 | |
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| 217 | |
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| 218 | IMPLICIT NONE |
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| 219 | |
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| 220 | IF ( use_synthetic_turbulence_generator ) THEN |
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| 221 | |
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| 222 | IF ( INDEX( initializing_actions, 'set_constant_profiles' ) == 0 .AND. & |
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| 223 | INDEX( initializing_actions, 'read_restart_data' ) == 0 ) THEN |
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| 224 | message_string = 'Using synthetic turbulence generator ' // & |
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| 225 | 'requires &initializing_actions = ' // & |
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| 226 | '"set_constant_profiles" or "read_restart_data"' |
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| 227 | CALL message( 'stg_check_parameters', 'PA0015', 1, 2, 0, 6, 0 ) |
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| 228 | ENDIF |
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| 229 | |
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| 230 | IF ( bc_lr /= 'dirichlet/radiation' ) THEN |
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| 231 | message_string = 'Using synthetic turbulence generator ' // & |
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| 232 | 'requires &bc_lr = "dirichlet/radiation"' |
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| 233 | CALL message( 'stg_check_parameters', 'PA0035', 1, 2, 0, 6, 0 ) |
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| 234 | ENDIF |
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| 235 | IF ( bc_ns /= 'cyclic' ) THEN |
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| 236 | message_string = 'Using synthetic turbulence generator ' // & |
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| 237 | 'requires &bc_ns = "cyclic"' |
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| 238 | CALL message( 'stg_check_parameters', 'PA0037', 1, 2, 0, 6, 0 ) |
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| 239 | ENDIF |
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| 240 | IF ( turbulent_inflow ) THEN |
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| 241 | message_string = 'Using synthetic turbulence generator ' // & |
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| 242 | 'in combination &with turbulent_inflow = .T. ' // & |
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| 243 | 'is not allowed' |
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| 244 | CALL message( 'stg_check_parameters', 'PA0039', 1, 2, 0, 6, 0 ) |
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| 245 | ENDIF |
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| 246 | |
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| 247 | ENDIF |
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| 248 | |
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| 249 | END SUBROUTINE stg_check_parameters |
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| 250 | |
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| 251 | |
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| 252 | !------------------------------------------------------------------------------! |
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| 253 | ! Description: |
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| 254 | ! ------------ |
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| 255 | !> Header output for synthetic turbulence generator |
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| 256 | !------------------------------------------------------------------------------! |
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| 257 | SUBROUTINE stg_header ( io ) |
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| 258 | |
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| 259 | |
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| 260 | IMPLICIT NONE |
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| 261 | |
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| 262 | INTEGER(iwp), INTENT(IN) :: io !< Unit of the output file |
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| 263 | |
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| 264 | ! |
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| 265 | !-- Write synthetic turbulence generator Header |
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| 266 | WRITE( io, 1 ) |
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| 267 | IF ( use_synthetic_turbulence_generator ) THEN |
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| 268 | WRITE( io, 2 ) |
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| 269 | ELSE |
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| 270 | WRITE( io, 3 ) |
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| 271 | ENDIF |
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| 272 | |
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| 273 | 1 FORMAT (//' Synthetic turbulence generator information:'/ & |
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| 274 | ' ------------------------------------------'/) |
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| 275 | 2 FORMAT (' synthetic turbulence generator switched on') |
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| 276 | 3 FORMAT (' synthetic turbulence generator switched off') |
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| 277 | |
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| 278 | END SUBROUTINE stg_header |
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| 279 | |
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| 280 | |
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| 281 | !------------------------------------------------------------------------------! |
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| 282 | ! Description: |
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| 283 | ! ------------ |
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| 284 | !> Initialization of the synthetic turbulence generator |
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| 285 | !------------------------------------------------------------------------------! |
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| 286 | SUBROUTINE stg_init |
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| 287 | |
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| 288 | |
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| 289 | USE arrays_3d, & |
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| 290 | ONLY: u_init, v_init |
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| 291 | |
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| 292 | USE control_parameters, & |
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| 293 | ONLY: coupling_char, dz, e_init |
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| 294 | |
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| 295 | USE grid_variables, & |
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| 296 | ONLY: ddy |
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| 297 | |
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| 298 | |
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| 299 | IMPLICIT NONE |
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| 300 | |
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| 301 | INTEGER(KIND=MPI_ADDRESS_KIND) :: extent !< extent of new MPI type |
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| 302 | INTEGER(KIND=MPI_ADDRESS_KIND) :: tob=0 !< dummy variable |
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| 303 | |
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| 304 | INTEGER(iwp) :: j !> loop index |
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| 305 | INTEGER(iwp) :: k !< index |
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| 306 | INTEGER(iwp) :: newtype !< dummy MPI type |
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| 307 | INTEGER(iwp) :: realsize !< size of REAL variables |
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| 308 | INTEGER(iwp) :: nseed !< dimension of random number seed |
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| 309 | INTEGER(iwp) :: startseed = 1234567890 !< start seed for random number generator |
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| 310 | |
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| 311 | ! |
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| 312 | !-- Dummy variables used for reading profiles |
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| 313 | REAL(wp) :: d1 !< u profile |
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| 314 | REAL(wp) :: d2 !< v profile |
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| 315 | REAL(wp) :: d3 !< w profile |
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| 316 | REAL(wp) :: d5 !< e profile |
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| 317 | REAL(wp) :: d11 !< vertical interpolation for a11 |
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| 318 | REAL(wp) :: d21 !< vertical interpolation for a21 |
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| 319 | REAL(wp) :: d22 !< vertical interpolation for a22 |
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| 320 | REAL(wp) :: luy !< length scale for u in y direction |
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| 321 | REAL(wp) :: luz !< length scale for u in z direction |
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| 322 | REAL(wp) :: lvy !< length scale for v in y direction |
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| 323 | REAL(wp) :: lvz !< length scale for v in z direction |
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| 324 | REAL(wp) :: lwy !< length scale for w in y direction |
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| 325 | REAL(wp) :: lwz !< length scale for w in z direction |
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| 326 | REAL(wp) :: zz !< height |
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| 327 | |
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| 328 | REAL(wp),DIMENSION(nzb:nzt+1) :: r11 !< Reynolds parameter |
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| 329 | REAL(wp),DIMENSION(nzb:nzt+1) :: r21 !< Reynolds parameter |
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| 330 | REAL(wp),DIMENSION(nzb:nzt+1) :: r22 !< Reynolds parameter |
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| 331 | REAL(wp),DIMENSION(nzb:nzt+1) :: r31 !< Reynolds parameter |
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| 332 | REAL(wp),DIMENSION(nzb:nzt+1) :: r32 !< Reynolds parameter |
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| 333 | REAL(wp),DIMENSION(nzb:nzt+1) :: r33 !< Reynolds parameter |
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| 334 | |
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| 335 | |
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| 336 | #if defined( __parallel ) |
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| 337 | CALL MPI_BARRIER( comm2d, ierr ) |
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| 338 | #endif |
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| 339 | |
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| 340 | CALL cpu_log( log_point(57), 'synthetic_turbulence_gen', 'start' ) |
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| 341 | |
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| 342 | IF ( .NOT. ALLOCATED( mean_inflow_profiles ) ) & |
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| 343 | ALLOCATE( mean_inflow_profiles(nzb:nzt+1,5) ) |
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| 344 | |
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| 345 | ALLOCATE ( a11(nzb:nzt+1), a21(nzb:nzt+1), a22(nzb:nzt+1), & |
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| 346 | a31(nzb:nzt+1), a32(nzb:nzt+1), a33(nzb:nzt+1), & |
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| 347 | nuy(nzb:nzt+1), nuz(nzb:nzt+1), nvy(nzb:nzt+1), & |
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| 348 | nvz(nzb:nzt+1), nwy(nzb:nzt+1), nwz(nzb:nzt+1), & |
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| 349 | tu(nzb:nzt+1), tv(nzb:nzt+1), tw(nzb:nzt+1) ) |
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| 350 | |
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| 351 | ! |
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| 352 | !-- Define MPI type used in stg_generate_seed_yz to gather vertical splitted |
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| 353 | !-- velocity seeds |
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| 354 | CALL MPI_TYPE_SIZE( MPI_REAL, realsize, ierr ) |
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| 355 | extent = 1 * realsize |
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| 356 | |
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| 357 | ! stg_type_yz: yz-slice with vertical bounds nzb:nzt+1 |
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| 358 | CALL MPI_TYPE_CREATE_SUBARRAY( 2, [nzt-nzb+2,nyng-nysg+1], & |
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| 359 | [1,nyng-nysg+1], [0,0], MPI_ORDER_FORTRAN, MPI_REAL, newtype, ierr ) |
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| 360 | CALL MPI_TYPE_CREATE_RESIZED( newtype, tob, extent, stg_type_yz, ierr ) |
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| 361 | CALL MPI_TYPE_COMMIT( stg_type_yz, ierr ) |
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| 362 | CALL MPI_TYPE_FREE( newtype, ierr ) |
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| 363 | |
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| 364 | ! stg_type_yz_small: yz-slice with vertical bounds nzb_x:nzt_x+1 |
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| 365 | CALL MPI_TYPE_CREATE_SUBARRAY( 2, [nzt_x-nzb_x+2,nyng-nysg+1], & |
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| 366 | [1,nyng-nysg+1], [0,0], MPI_ORDER_FORTRAN, MPI_REAL, newtype, ierr ) |
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| 367 | CALL MPI_TYPE_CREATE_RESIZED( newtype, tob, extent, stg_type_yz_small, ierr ) |
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| 368 | CALL MPI_TYPE_COMMIT( stg_type_yz_small, ierr ) |
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| 369 | CALL MPI_TYPE_FREE( newtype, ierr ) |
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| 370 | |
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| 371 | ! receive count and displacement for MPI_GATHERV in stg_generate_seed_yz |
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| 372 | ALLOCATE( recv_count(pdims(1)), displs(pdims(1)) ) |
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| 373 | |
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| 374 | recv_count = nzt_x-nzb_x + 1 |
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| 375 | recv_count(pdims(1)) = recv_count(pdims(1)) + 1 |
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| 376 | |
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| 377 | DO j = 1, pdims(1) |
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| 378 | displs(j) = 0 + (nzt_x-nzb_x+1) * (j-1) |
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| 379 | ENDDO |
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| 380 | |
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| 381 | ! |
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| 382 | !-- Define seed of random number |
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| 383 | CALL RANDOM_SEED() |
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| 384 | CALL RANDOM_SEED( size=nseed ) |
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| 385 | ALLOCATE( seed(1:nseed) ) |
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| 386 | DO j = 1, nseed |
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| 387 | seed(j) = startseed + j |
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| 388 | ENDDO |
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| 389 | CALL RANDOM_SEED(put=seed) |
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| 390 | |
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| 391 | ! |
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| 392 | !-- Read inflow profile |
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| 393 | !-- Height levels of profiles in input profile is as follows: |
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| 394 | !-- zu: luy, luz, tu, lvy, lvz, tv, r11, r21, r22, d1, d2, d5 |
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| 395 | !-- zw: lwy, lwz, tw, r31, r32, r33, d3 |
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| 396 | !-- WARNING: zz is not used at the moment |
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| 397 | OPEN( 24, FILE='STG_PROFILES'//TRIM( coupling_char ), STATUS='OLD', & |
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| 398 | FORM='FORMATTED') |
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| 399 | |
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| 400 | ! Skip header |
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| 401 | READ( 24, * ) |
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| 402 | |
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| 403 | DO k = nzb, nzt+1 |
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| 404 | READ( 24, * ) zz, luy, luz, tu(k), lvy, lvz, tv(k), lwy, lwz, tw(k), & |
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| 405 | r11(k), r21(k), r22(k), r31(k), r32(k), r33(k), & |
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| 406 | d1, d2, d3, d5 |
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| 407 | |
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| 408 | ! |
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| 409 | !-- Convert length scales from meter to number of grid points |
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| 410 | nuy(k) = INT( luy * ddy ) |
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| 411 | nuz(k) = INT( luz / dz ) |
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| 412 | nvy(k) = INT( lvy * ddy ) |
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| 413 | nvz(k) = INT( lvz / dz ) |
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| 414 | nwy(k) = INT( lwy * ddy ) |
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| 415 | nwz(k) = INT( lwz / dz ) |
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| 416 | |
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| 417 | ! |
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| 418 | !-- Save Mean inflow profiles |
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| 419 | IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN |
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| 420 | mean_inflow_profiles(k,1) = d1 |
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| 421 | mean_inflow_profiles(k,2) = d2 |
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| 422 | ! mean_inflow_profiles(k,4) = d4 |
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| 423 | mean_inflow_profiles(k,5) = d5 |
---|
| 424 | ENDIF |
---|
| 425 | ENDDO |
---|
| 426 | |
---|
| 427 | CLOSE(24) |
---|
| 428 | |
---|
| 429 | ! |
---|
| 430 | !-- Assign initial profiles |
---|
| 431 | u_init = mean_inflow_profiles(:,1) |
---|
| 432 | v_init = mean_inflow_profiles(:,2) |
---|
| 433 | ! pt_init = mean_inflow_profiles(:,4) |
---|
| 434 | e_init = MAXVAL( mean_inflow_profiles(:,5) ) |
---|
| 435 | |
---|
| 436 | ! |
---|
| 437 | !-- Calculate coefficient matrix from Reynolds stress tensor (Lund rotation) |
---|
| 438 | DO k = nzb, nzt+1 |
---|
| 439 | IF ( r11(k) > 0.0_wp ) THEN |
---|
| 440 | a11(k) = SQRT( r11(k) ) |
---|
| 441 | a21(k) = r21(k) / a11(k) |
---|
| 442 | ELSE |
---|
| 443 | a11(k) = 0.0_wp |
---|
| 444 | a21(k) = 0.0_wp |
---|
| 445 | ENDIF |
---|
| 446 | |
---|
| 447 | a22(k) = r22(k) - a21(k)**2 |
---|
| 448 | IF ( a22(k) > 0.0_wp ) THEN |
---|
| 449 | a22(k) = SQRT( a22(k) ) |
---|
| 450 | a32(k) = ( r32(k) - a21(k) * a31(k) ) / a22(k) |
---|
| 451 | ELSE |
---|
| 452 | a22(k) = 0.0_wp |
---|
| 453 | a32(k) = 0.0_wp |
---|
| 454 | ENDIF |
---|
| 455 | |
---|
| 456 | ! |
---|
| 457 | !-- a31, a32, a33 must be calculated with interpolated a11, a21, a22 (d11, |
---|
| 458 | !-- d21, d22) because of different vertical grid |
---|
| 459 | IF ( k .le. nzt ) THEN |
---|
| 460 | d11 = 0.5_wp * ( r11(k) + r11(k+1) ) |
---|
| 461 | IF ( d11 > 0.0_wp ) THEN |
---|
| 462 | d11 = SQRT( d11 ) |
---|
| 463 | d21 = ( 0.5_wp * ( r21(k) + r21(k+1) ) ) / d11 |
---|
| 464 | a31(k) = r31(k) / d11 |
---|
| 465 | ELSE |
---|
| 466 | d21 = 0.0_wp |
---|
| 467 | a31(k) = 0.0_wp |
---|
| 468 | ENDIF |
---|
| 469 | |
---|
| 470 | d22 = 0.5_wp * ( r22(k) + r22(k+1) ) - d21 ** 2 |
---|
| 471 | IF ( d22 > 0.0_wp ) THEN |
---|
| 472 | a32(k) = ( r32(k) - d21 * a31(k) ) / SQRT( d22 ) |
---|
| 473 | ELSE |
---|
| 474 | a32(k) = 0.0_wp |
---|
| 475 | ENDIF |
---|
| 476 | |
---|
| 477 | a33(k) = r33(k) - a31(k) ** 2 - a32(k) ** 2 |
---|
| 478 | IF ( a33(k) > 0.0_wp ) THEN |
---|
| 479 | a33(k) = SQRT( a33(k) ) |
---|
| 480 | ELSE |
---|
| 481 | a33(k) = 0.0_wp |
---|
| 482 | ENDIF |
---|
| 483 | ELSE |
---|
| 484 | a31(k) = a31(k-1) |
---|
| 485 | a32(k) = a32(k-1) |
---|
| 486 | a33(k) = a33(k-1) |
---|
| 487 | ENDIF |
---|
| 488 | |
---|
| 489 | ENDDO |
---|
| 490 | |
---|
| 491 | ! |
---|
| 492 | !-- Define the size of the filter functions and allocate them. |
---|
| 493 | merg = 0 |
---|
| 494 | |
---|
| 495 | ! arrays must be large enough to cover the largest length scale |
---|
| 496 | DO k = nzb, nzt+1 |
---|
| 497 | j = MAX( ABS(nuy(k)), ABS(nuz(k)), & |
---|
| 498 | ABS(nvy(k)), ABS(nvz(k)), & |
---|
| 499 | ABS(nwy(k)), ABS(nwz(k)) ) |
---|
| 500 | IF ( j > merg ) merg = j |
---|
| 501 | ENDDO |
---|
| 502 | |
---|
| 503 | merg = 2 * merg |
---|
| 504 | mergp = merg + nbgp |
---|
| 505 | |
---|
| 506 | ALLOCATE ( buy(-merg:merg,nzb:nzt+1), buz(-merg:merg,nzb:nzt+1), & |
---|
| 507 | bvy(-merg:merg,nzb:nzt+1), bvz(-merg:merg,nzb:nzt+1), & |
---|
| 508 | bwy(-merg:merg,nzb:nzt+1), bwz(-merg:merg,nzb:nzt+1) ) |
---|
| 509 | |
---|
| 510 | ! |
---|
| 511 | !-- Allocate velocity seeds |
---|
| 512 | ALLOCATE ( fu( nzb:nzt+1,nysg:nyng), fuo(nzb:nzt+1,nysg:nyng), & |
---|
| 513 | fv( nzb:nzt+1,nysg:nyng), fvo(nzb:nzt+1,nysg:nyng), & |
---|
| 514 | fw( nzb:nzt+1,nysg:nyng), fwo(nzb:nzt+1,nysg:nyng) ) |
---|
| 515 | |
---|
| 516 | fu = 0._wp |
---|
| 517 | fuo = 0._wp |
---|
| 518 | fv = 0._wp |
---|
| 519 | fvo = 0._wp |
---|
| 520 | fw = 0._wp |
---|
| 521 | fwo = 0._wp |
---|
| 522 | |
---|
| 523 | ! |
---|
| 524 | !-- Create filter functions |
---|
| 525 | CALL stg_filter_func( nuy, buy ) !filter uy |
---|
| 526 | CALL stg_filter_func( nuz, buz ) !filter uz |
---|
| 527 | CALL stg_filter_func( nvy, bvy ) !filter vy |
---|
| 528 | CALL stg_filter_func( nvz, bvz ) !filter vz |
---|
| 529 | CALL stg_filter_func( nwy, bwy ) !filter wy |
---|
| 530 | CALL stg_filter_func( nwz, bwz ) !filter wz |
---|
| 531 | |
---|
| 532 | #if defined( __parallel ) |
---|
| 533 | CALL MPI_BARRIER( comm2d, ierr ) |
---|
| 534 | #endif |
---|
| 535 | |
---|
| 536 | ! |
---|
| 537 | !-- In case of restart, calculate velocity seeds fu, fv, fw from former |
---|
| 538 | ! time step. |
---|
| 539 | ! Bug: fu, fv, fw are different in those heights where a11, a22, a33 |
---|
| 540 | ! are 0 compared to the prerun. This is mostly for k=nzt+1. |
---|
| 541 | IF ( TRIM( initializing_actions ) == 'read_restart_data' ) THEN |
---|
| 542 | IF ( myidx == id_inflow ) THEN |
---|
| 543 | DO j = nysg, nyng |
---|
| 544 | DO k = nzb, nzt+1 |
---|
| 545 | |
---|
| 546 | IF ( a11(k) .NE. 0._wp ) THEN |
---|
| 547 | fu(k,j) = ( u(k,j,-1) / mc_factor - & |
---|
| 548 | mean_inflow_profiles(k,1) ) / a11(k) |
---|
| 549 | ELSE |
---|
| 550 | fu(k,j) = 0._wp |
---|
| 551 | ENDIF |
---|
| 552 | |
---|
| 553 | IF ( a22(k) .NE. 0._wp ) THEN |
---|
| 554 | fv(k,j) = ( v(k,j,-1) / mc_factor - a21(k) * fu(k,j) - & |
---|
| 555 | mean_inflow_profiles(k,2) ) / a22(k) |
---|
| 556 | ELSE |
---|
| 557 | fv(k,j) = 0._wp |
---|
| 558 | ENDIF |
---|
| 559 | |
---|
| 560 | IF ( a33(k) .NE. 0._wp ) THEN |
---|
| 561 | fw(k,j) = ( w(k,j,-1) / mc_factor - a31(k) * fu(k,j) - & |
---|
| 562 | a32(k) * fv(k,j) ) / a33(k) |
---|
| 563 | ELSE |
---|
| 564 | fw = 0._wp |
---|
| 565 | ENDIF |
---|
| 566 | |
---|
| 567 | ENDDO |
---|
| 568 | ENDDO |
---|
| 569 | ENDIF |
---|
| 570 | ENDIF |
---|
| 571 | |
---|
| 572 | CALL cpu_log( log_point(57), 'synthetic_turbulence_gen', 'stop' ) |
---|
| 573 | |
---|
| 574 | END SUBROUTINE stg_init |
---|
| 575 | |
---|
| 576 | |
---|
| 577 | !------------------------------------------------------------------------------! |
---|
| 578 | ! Description: |
---|
| 579 | ! ------------ |
---|
| 580 | !> Calculate filter function bxx from length scale nxx following Eg.9 and 10 |
---|
| 581 | !> (Xie and Castro, 2008) |
---|
| 582 | !------------------------------------------------------------------------------! |
---|
| 583 | SUBROUTINE stg_filter_func( nxx, bxx ) |
---|
| 584 | |
---|
| 585 | |
---|
| 586 | IMPLICIT NONE |
---|
| 587 | |
---|
| 588 | INTEGER(iwp) :: k !< loop index |
---|
| 589 | INTEGER(iwp) :: n_k !< length scale nXX in height k |
---|
| 590 | INTEGER(iwp) :: n_k2 !< n_k * 2 |
---|
| 591 | INTEGER(iwp) :: nf !< index for length scales |
---|
| 592 | |
---|
| 593 | REAL(wp) :: bdenom !< denominator for filter functions bXX |
---|
| 594 | REAL(wp) :: qsi = 1.0_wp !< minimization factor |
---|
| 595 | |
---|
| 596 | INTEGER(iwp), DIMENSION(:) :: nxx(nzb:nzt+1) !< length scale (in gp) |
---|
| 597 | |
---|
| 598 | REAL(wp), DIMENSION(:,:) :: bxx(-merg:merg,nzb:nzt+1) !< filter function |
---|
| 599 | |
---|
| 600 | |
---|
| 601 | bxx = 0.0_wp |
---|
| 602 | |
---|
| 603 | DO k = nzb, nzt+1 |
---|
| 604 | bdenom = 0.0_wp |
---|
| 605 | n_k = nxx(k) |
---|
| 606 | IF ( n_k /= 0 ) THEN |
---|
| 607 | n_k2 = n_k * 2 |
---|
| 608 | |
---|
| 609 | ! |
---|
| 610 | !-- ( Eq.10 )^2 |
---|
| 611 | DO nf = -n_k2, n_k2 |
---|
| 612 | bdenom = bdenom + EXP( -qsi * pi * ABS(nf) / n_k )**2 |
---|
| 613 | ENDDO |
---|
| 614 | |
---|
| 615 | ! |
---|
| 616 | !-- ( Eq.9 ) |
---|
| 617 | bdenom = SQRT( bdenom ) |
---|
| 618 | DO nf = -n_k2, n_k2 |
---|
| 619 | bxx(nf,k) = EXP( -qsi * pi * ABS(nf) / n_k ) / bdenom |
---|
| 620 | ENDDO |
---|
| 621 | ENDIF |
---|
| 622 | ENDDO |
---|
| 623 | |
---|
| 624 | END SUBROUTINE stg_filter_func |
---|
| 625 | |
---|
| 626 | |
---|
| 627 | !------------------------------------------------------------------------------! |
---|
| 628 | ! Description: |
---|
| 629 | ! ------------ |
---|
| 630 | !> Parin for &stg_par for synthetic turbulence generator |
---|
| 631 | !------------------------------------------------------------------------------! |
---|
| 632 | SUBROUTINE stg_parin |
---|
| 633 | |
---|
| 634 | |
---|
| 635 | IMPLICIT NONE |
---|
| 636 | |
---|
| 637 | CHARACTER (LEN=80) :: line !< dummy string that contains the current line of the parameter file |
---|
| 638 | |
---|
| 639 | |
---|
| 640 | NAMELIST /stg_par/ use_synthetic_turbulence_generator |
---|
| 641 | |
---|
| 642 | line = ' ' |
---|
| 643 | |
---|
| 644 | ! |
---|
| 645 | !-- Try to find stg package |
---|
| 646 | REWIND ( 11 ) |
---|
| 647 | line = ' ' |
---|
| 648 | DO WHILE ( INDEX( line, '&stg_par' ) == 0 ) |
---|
| 649 | READ ( 11, '(A)', END=10 ) line |
---|
| 650 | ENDDO |
---|
| 651 | BACKSPACE ( 11 ) |
---|
| 652 | |
---|
| 653 | ! |
---|
| 654 | !-- Read namelist |
---|
| 655 | READ ( 11, stg_par ) |
---|
| 656 | |
---|
| 657 | ! |
---|
| 658 | !-- Set flag that indicates that the synthetic turbulence generator is switched |
---|
| 659 | !-- on |
---|
| 660 | synthetic_turbulence_generator = .TRUE. |
---|
| 661 | |
---|
| 662 | 10 CONTINUE |
---|
| 663 | |
---|
| 664 | END SUBROUTINE stg_parin |
---|
| 665 | |
---|
| 666 | |
---|
| 667 | !------------------------------------------------------------------------------! |
---|
| 668 | ! Description: |
---|
| 669 | ! ------------ |
---|
| 670 | !> This routine reads the respective restart data. |
---|
| 671 | !------------------------------------------------------------------------------! |
---|
| 672 | SUBROUTINE stg_read_restart_data |
---|
| 673 | |
---|
| 674 | |
---|
| 675 | IMPLICIT NONE |
---|
| 676 | |
---|
| 677 | CHARACTER (LEN=30) :: variable_chr !< dummy variable to read string |
---|
| 678 | |
---|
| 679 | |
---|
| 680 | READ ( 13 ) variable_chr |
---|
| 681 | DO WHILE ( TRIM( variable_chr ) /= '*** end stg module ***' ) |
---|
| 682 | |
---|
| 683 | SELECT CASE ( TRIM( variable_chr ) ) |
---|
| 684 | |
---|
| 685 | CASE ( 'use_synthetic_turbulence_generator ' ) |
---|
| 686 | READ ( 13 ) use_synthetic_turbulence_generator |
---|
| 687 | CASE ( 'mc_factor' ) |
---|
| 688 | READ ( 13 ) mc_factor |
---|
| 689 | |
---|
| 690 | END SELECT |
---|
| 691 | |
---|
| 692 | READ ( 13 ) variable_chr |
---|
| 693 | |
---|
| 694 | ENDDO |
---|
| 695 | |
---|
| 696 | END SUBROUTINE stg_read_restart_data |
---|
| 697 | |
---|
| 698 | |
---|
| 699 | !------------------------------------------------------------------------------! |
---|
| 700 | ! Description: |
---|
| 701 | ! ------------ |
---|
| 702 | !> This routine writes the respective restart data. |
---|
| 703 | !------------------------------------------------------------------------------! |
---|
| 704 | SUBROUTINE stg_write_restart_data |
---|
| 705 | |
---|
| 706 | |
---|
| 707 | IMPLICIT NONE |
---|
| 708 | |
---|
| 709 | WRITE ( 14 ) 'use_synthetic_turbulence_generator ' |
---|
| 710 | WRITE ( 14 ) use_synthetic_turbulence_generator |
---|
| 711 | WRITE ( 14 ) 'mc_factor ' |
---|
| 712 | WRITE ( 14 ) mc_factor |
---|
| 713 | |
---|
| 714 | WRITE ( 14 ) '*** end stg module *** ' |
---|
| 715 | |
---|
| 716 | END SUBROUTINE stg_write_restart_data |
---|
| 717 | |
---|
| 718 | |
---|
| 719 | !------------------------------------------------------------------------------! |
---|
| 720 | ! Description: |
---|
| 721 | ! ------------ |
---|
| 722 | !> Create turbulent inflow fields for u, v, w with prescribed length scales and |
---|
| 723 | !> Reynolds stress tensor after a method of Xie and Castro (2008), modified |
---|
| 724 | !> following suggestions of Kim et al. (2013), and using a Lund rotation |
---|
| 725 | !> (Lund, 1998). |
---|
| 726 | !------------------------------------------------------------------------------! |
---|
| 727 | SUBROUTINE stg_main |
---|
| 728 | |
---|
| 729 | |
---|
| 730 | USE arrays_3d, & |
---|
| 731 | ONLY: dzw |
---|
| 732 | |
---|
| 733 | USE control_parameters, & |
---|
| 734 | ONLY: dt_3d, intermediate_timestep_count, simulated_time, & |
---|
| 735 | volume_flow_initial |
---|
| 736 | |
---|
| 737 | USE indices, & |
---|
| 738 | ONLY: nyn, nys |
---|
| 739 | |
---|
| 740 | USE statistics, & |
---|
| 741 | ONLY: weight_substep |
---|
| 742 | |
---|
| 743 | |
---|
| 744 | IMPLICIT NONE |
---|
| 745 | |
---|
| 746 | INTEGER(iwp) :: j !< loop index in y-direction |
---|
| 747 | INTEGER(iwp) :: k !< loop index in z-direction |
---|
| 748 | |
---|
| 749 | REAL(wp) :: dt_stg !< wheighted subtimestep |
---|
| 750 | REAL(wp) :: mc_factor_l !< local mass flux correction factor |
---|
| 751 | |
---|
| 752 | REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng,5,nbgp) :: inflow_dist !< disturbance for inflow profiles |
---|
| 753 | |
---|
| 754 | |
---|
| 755 | CALL cpu_log( log_point(57), 'synthetic_turbulence_gen', 'start' ) |
---|
| 756 | |
---|
| 757 | ! |
---|
| 758 | !-- Calculate time step which is needed for filter functions |
---|
| 759 | dt_stg = dt_3d * weight_substep(intermediate_timestep_count) |
---|
| 760 | |
---|
| 761 | ! |
---|
| 762 | !-- Initial value of fu, fv, fw |
---|
| 763 | IF ( simulated_time == 0.0_wp .AND. .NOT. velocity_seed_initialized ) THEN |
---|
| 764 | CALL stg_generate_seed_yz( nuy, nuz, buy, buz, fu ) |
---|
| 765 | CALL stg_generate_seed_yz( nvy, nvz, bvy, bvz, fv ) |
---|
| 766 | CALL stg_generate_seed_yz( nwy, nwz, bwy, bwz, fw ) |
---|
| 767 | velocity_seed_initialized = .TRUE. |
---|
| 768 | ENDIF |
---|
| 769 | ! |
---|
| 770 | !-- New set of fu, fv, fw |
---|
| 771 | CALL stg_generate_seed_yz( nuy, nuz, buy, buz, fuo ) |
---|
| 772 | CALL stg_generate_seed_yz( nvy, nvz, bvy, bvz, fvo ) |
---|
| 773 | CALL stg_generate_seed_yz( nwy, nwz, bwy, bwz, fwo ) |
---|
| 774 | |
---|
| 775 | IF ( myidx == id_inflow ) THEN |
---|
| 776 | |
---|
| 777 | DO j = nysg, nyng |
---|
| 778 | DO k = nzb, nzt + 1 |
---|
| 779 | ! |
---|
| 780 | !-- Update fu, fv, fw following Eq. 14 of Xie and Castro (2008) |
---|
| 781 | IF ( tu(k) == 0.0_wp ) THEN |
---|
| 782 | fu(k,j) = fuo(k,j) |
---|
| 783 | ELSE |
---|
| 784 | fu(k,j) = fu(k,j) * EXP( -pi * dt_stg * 0.5_wp / tu(k) ) + & |
---|
| 785 | fuo(k,j) * SQRT( 1.0_wp - EXP( -pi * dt_stg / tu(k) ) ) |
---|
| 786 | ENDIF |
---|
| 787 | |
---|
| 788 | IF ( tv(k) == 0.0_wp ) THEN |
---|
| 789 | fv(k,j) = fvo(k,j) |
---|
| 790 | ELSE |
---|
| 791 | fv(k,j) = fv(k,j) * EXP( -pi * dt_stg * 0.5_wp / tv(k) ) + & |
---|
| 792 | fvo(k,j) * SQRT( 1.0_wp - EXP( -pi * dt_stg / tv(k) ) ) |
---|
| 793 | ENDIF |
---|
| 794 | |
---|
| 795 | IF ( tw(k) == 0.0_wp ) THEN |
---|
| 796 | fw(k,j) = fwo(k,j) |
---|
| 797 | ELSE |
---|
| 798 | fw(k,j) = fw(k,j) * EXP( -pi * dt_stg * 0.5_wp / tw(k) ) + & |
---|
| 799 | fwo(k,j) * SQRT( 1.0_wp - EXP( -pi * dt_stg / tw(k) ) ) |
---|
| 800 | ENDIF |
---|
| 801 | ! |
---|
| 802 | !-- Lund rotation following Eq. 17 in Xie and Castro (2008). |
---|
| 803 | !-- Additional factors are added to improve the variance of v and w |
---|
| 804 | IF( k == 0 ) THEN |
---|
| 805 | inflow_dist(k,j,1,1) = 0.0_wp |
---|
| 806 | inflow_dist(k,j,2,1) = 0.0_wp |
---|
| 807 | inflow_dist(k,j,3,1) = 0.0_wp |
---|
| 808 | inflow_dist(k,j,4,1) = 0.0_wp |
---|
| 809 | inflow_dist(k,j,5,1) = 0.0_wp |
---|
| 810 | ELSE |
---|
| 811 | inflow_dist(k,j,1,1) = a11(k) * fu(k,j) |
---|
| 812 | !experimental test of 1.2 |
---|
| 813 | inflow_dist(k,j,2,1) = ( SQRT( a22(k) / MAXVAL(a22) ) & |
---|
| 814 | * 1.2_wp ) & |
---|
| 815 | * ( a21(k) * fu(k,j) & |
---|
| 816 | + a22(k) * fv(k,j) ) |
---|
| 817 | inflow_dist(k,j,3,1) = ( SQRT(a33(k) / MAXVAL(a33) ) & |
---|
| 818 | * 1.3_wp ) & |
---|
| 819 | * ( a31(k) * fu(k,j) & |
---|
| 820 | + a32(k) * fv(k,j) & |
---|
| 821 | + a33(k) * fw(k,j) ) |
---|
| 822 | ! Calculation for pt and e not yet implemented |
---|
| 823 | inflow_dist(k,j,4,1) = 0.0_wp |
---|
| 824 | inflow_dist(k,j,5,1) = 0.0_wp |
---|
| 825 | ENDIF |
---|
| 826 | |
---|
| 827 | ENDDO |
---|
| 828 | ENDDO |
---|
| 829 | |
---|
| 830 | ! |
---|
| 831 | !-- Mass flux correction following Kim et al. (2013) |
---|
| 832 | !-- This correction factor insures that the mass flux is preserved at the |
---|
| 833 | !-- inflow boundary |
---|
| 834 | mc_factor_l = 0.0_wp |
---|
| 835 | mc_factor = 0.0_wp |
---|
| 836 | DO j = nys, nyn |
---|
| 837 | DO k = nzb+1, nzt |
---|
| 838 | mc_factor_l = mc_factor_l + dzw(k) * & |
---|
| 839 | ( mean_inflow_profiles(k,1) + inflow_dist(k,j,1,1) ) |
---|
| 840 | ENDDO |
---|
| 841 | ENDDO |
---|
| 842 | |
---|
| 843 | #if defined( __parallel ) |
---|
| 844 | CALL MPI_ALLREDUCE( mc_factor_l, mc_factor, & |
---|
| 845 | 1, MPI_REAL, MPI_SUM, comm1dy, ierr ) |
---|
| 846 | #else |
---|
| 847 | mc_factor = mc_factor_l |
---|
| 848 | #endif |
---|
| 849 | |
---|
| 850 | mc_factor = volume_flow_initial(1) / mc_factor |
---|
| 851 | |
---|
| 852 | ! |
---|
| 853 | !-- Add disturbance at the inflow |
---|
| 854 | DO j = nysg, nyng |
---|
| 855 | DO k = nzb, nzt+1 |
---|
| 856 | u(k,j,-nbgp+1:0) = ( mean_inflow_profiles(k,1) + & |
---|
| 857 | inflow_dist(k,j,1,1) ) * mc_factor |
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| 858 | v(k,j,-nbgp:-1) = ( mean_inflow_profiles(k,2) + & |
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| 859 | inflow_dist(k,j,2,1) ) * mc_factor |
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| 860 | w(k,j,-nbgp:-1) = inflow_dist(k,j,3,1) * mc_factor |
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| 861 | ENDDO |
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| 862 | ENDDO |
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| 863 | |
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| 864 | ENDIF |
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| 865 | |
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| 866 | CALL cpu_log( log_point(57), 'synthetic_turbulence_gen', 'stop' ) |
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| 867 | |
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| 868 | END SUBROUTINE stg_main |
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| 869 | |
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| 870 | |
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| 871 | !------------------------------------------------------------------------------! |
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| 872 | ! Description: |
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| 873 | ! ------------ |
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| 874 | !> Generate a set of random number rand_it wich is equal on each PE |
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| 875 | !> and calculate the velocity seed f_n. |
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| 876 | !> f_n is splitted in vertical direction by the number of PEs in x-direction and |
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| 877 | !> and each PE calculates a vertical subsection of f_n. At the the end, all |
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| 878 | !> parts are collected to form the full array. |
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| 879 | !------------------------------------------------------------------------------! |
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| 880 | SUBROUTINE stg_generate_seed_yz( n_y, n_z, b_y, b_z, f_n ) |
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| 881 | |
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| 882 | |
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| 883 | USE indices, & |
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| 884 | ONLY: ny |
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| 885 | |
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| 886 | |
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| 887 | IMPLICIT NONE |
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| 888 | |
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| 889 | INTEGER(iwp) :: j !< loop index in y-direction |
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| 890 | INTEGER(iwp) :: jj !< loop index in y-direction |
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| 891 | INTEGER(iwp) :: k !< loop index in z-direction |
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| 892 | INTEGER(iwp) :: kk !< loop index in z-direction |
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| 893 | INTEGER(iwp) :: send_count !< send count for MPI_GATHERV |
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| 894 | |
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| 895 | INTEGER(iwp), DIMENSION(nzb:nzt+1) :: n_y !< length scale in y-direction |
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| 896 | INTEGER(iwp), DIMENSION(nzb:nzt+1) :: n_z !< length scale in z-direction |
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| 897 | INTEGER(iwp), DIMENSION(nzb:nzt+1) :: n_y2 !< n_y*2 |
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| 898 | INTEGER(iwp), DIMENSION(nzb:nzt+1) :: n_z2 !< n_z*2 |
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| 899 | |
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| 900 | REAL(wp) :: nyz_inv !< inverse of number of grid points in yz-slice |
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| 901 | REAL(wp) :: rand_av !< average of random number |
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| 902 | REAL(wp) :: rand_sigma_inv !< inverse of stdev of random number |
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| 903 | |
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| 904 | REAL(wp), DIMENSION(-merg:merg,nzb:nzt+1) :: b_y !< filter func in y-dir |
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| 905 | REAL(wp), DIMENSION(-merg:merg,nzb:nzt+1) :: b_z !< filter func in z-dir |
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| 906 | REAL(wp), DIMENSION(nzb_x:nzt_x+1,nysg:nyng) :: f_n_l !< local velocity seed |
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| 907 | REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng) :: f_n !< velocity seed |
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| 908 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: rand_it !< random number |
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| 909 | |
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| 910 | |
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| 911 | ! |
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| 912 | !-- Generate random numbers using a seed generated in stg_init. |
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| 913 | !-- The set of random numbers are modified to have an average of 0 and |
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| 914 | !-- unit variance. |
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| 915 | ALLOCATE( rand_it(nzb-mergp:nzt+1+mergp,-mergp:ny+mergp) ) |
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| 916 | |
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| 917 | rand_av = 0.0_wp |
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| 918 | rand_sigma_inv = 0.0_wp |
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| 919 | nyz_inv = 1.0_wp / REAL( ( nzt+1 - nzb+1 ) * ( ny+1 ), KIND=wp ) |
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| 920 | |
---|
| 921 | DO j = 0, ny |
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| 922 | DO k = nzb, nzt+1 |
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| 923 | CALL RANDOM_NUMBER( rand_it(k,j) ) |
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| 924 | rand_av = rand_av + rand_it(k,j) |
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| 925 | ENDDO |
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| 926 | ENDDO |
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| 927 | |
---|
| 928 | rand_av = rand_av * nyz_inv |
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| 929 | |
---|
| 930 | DO j = 0, ny |
---|
| 931 | DO k = nzb, nzt+1 |
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| 932 | rand_it(k,j) = rand_it(k,j) - rand_av |
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| 933 | rand_sigma_inv = rand_sigma_inv + rand_it(k,j) ** 2 |
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| 934 | ENDDO |
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| 935 | ENDDO |
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| 936 | |
---|
| 937 | rand_sigma_inv = 1.0_wp / SQRT(rand_sigma_inv * nyz_inv) |
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| 938 | |
---|
| 939 | DO j = 0, ny |
---|
| 940 | DO k = nzb, nzt+1 |
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| 941 | rand_it(k,j) = rand_it(k,j) * rand_sigma_inv |
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| 942 | ENDDO |
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| 943 | ENDDO |
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| 944 | |
---|
| 945 | ! |
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| 946 | !-- Periodic fill of random number in space |
---|
| 947 | DO j = 0, ny |
---|
| 948 | DO k = 1, mergp |
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| 949 | rand_it(nzb -k,j) = rand_it(nzt+2-k,j) ! bottom margin |
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| 950 | rand_it(nzt+1+k,j) = rand_it(nzb+k-1,j) ! top margin |
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| 951 | ENDDO |
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| 952 | ENDDO |
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| 953 | DO j = 1, mergp |
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| 954 | DO k = nzb-mergp, nzt+1+mergp |
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| 955 | rand_it(k, -j) = rand_it(k,ny-j+1) ! south margin |
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| 956 | rand_it(k,ny+j) = rand_it(k, j-1) ! north margin |
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| 957 | ENDDO |
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| 958 | ENDDO |
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| 959 | |
---|
| 960 | ! |
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| 961 | !-- Generate velocity seed following Eq.6 of Xie and Castro (2008) |
---|
| 962 | n_y2 = n_y * 2 |
---|
| 963 | n_z2 = n_z * 2 |
---|
| 964 | f_n_l = 0.0_wp |
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| 965 | |
---|
| 966 | DO j = nysg, nyng |
---|
| 967 | DO k = nzb_x, nzt_x+1 |
---|
| 968 | DO jj = -n_y2(k), n_y2(k) |
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| 969 | DO kk = -n_z2(k), n_z2(k) |
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| 970 | f_n_l(k,j) = f_n_l(k,j) & |
---|
| 971 | + b_y(jj,k) * b_z(kk,k) * rand_it(k+kk,j+jj) |
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| 972 | ENDDO |
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| 973 | ENDDO |
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| 974 | ENDDO |
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| 975 | ENDDO |
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| 976 | |
---|
| 977 | DEALLOCATE( rand_it ) |
---|
| 978 | |
---|
| 979 | ! |
---|
| 980 | !-- Gather velocity seeds of full subdomain |
---|
| 981 | send_count = nzt_x - nzb_x + 1 |
---|
| 982 | IF ( nzt_x == nzt ) send_count = send_count + 1 |
---|
| 983 | |
---|
| 984 | #if defined( __parallel ) |
---|
| 985 | CALL MPI_GATHERV( f_n_l(nzb_x,nysg), send_count, stg_type_yz_small, & |
---|
| 986 | f_n(nzb+1,nysg), recv_count, displs, stg_type_yz, & |
---|
| 987 | id_inflow, comm1dx, ierr ) |
---|
| 988 | #else |
---|
| 989 | f_n(nzb+1:nzt+1,nysg:nyng) = f_n_l(nzb_x:nzt_x+1,nysg:nyng) |
---|
| 990 | #endif |
---|
| 991 | |
---|
| 992 | |
---|
| 993 | END SUBROUTINE stg_generate_seed_yz |
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| 994 | |
---|
| 995 | END MODULE synthetic_turbulence_generator_mod |
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