!> @file disturb_heatflux.f90 !------------------------------------------------------------------------------! ! This file is part of PALM. ! ! 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 1997-2017 Leibniz Universitaet Hannover !------------------------------------------------------------------------------! ! ! Current revisions: ! ------------------ ! ! ! Former revisions: ! ----------------- ! $Id: disturb_heatflux.f90 2233 2017-05-30 18:08:54Z Giersch $ ! ! 2232 2017-05-30 17:47:52Z suehring ! Adjustment according new surface data type. ! Implemented parallel random number generator to obtain always the same ! random number distribution regardless of the processor distribution. ! ! 2037 2016-10-26 11:15:40Z knoop ! Anelastic approximation implemented ! ! 2000 2016-08-20 18:09:15Z knoop ! Forced header and separation lines into 80 columns ! ! 1682 2015-10-07 23:56:08Z knoop ! Code annotations made doxygen readable ! ! 1353 2014-04-08 15:21:23Z heinze ! REAL constants provided with KIND-attribute ! ! 1322 2014-03-20 16:38:49Z raasch ! REAL constants defined as wp-kind ! ! 1320 2014-03-20 08:40:49Z raasch ! ONLY-attribute added to USE-statements, ! kind-parameters added to all INTEGER and REAL declaration statements, ! kinds are defined in new module kinds, ! revision history before 2012 removed, ! comment fields (!:) to be used for variable explanations added to ! all variable declaration statements ! ! 1036 2012-10-22 13:43:42Z raasch ! code put under GPL (PALM 3.9) ! ! Revision 1.1 1998/03/25 20:03:47 raasch ! Initial revision ! ! ! Description: ! ------------ !> Generate random, normally distributed heatflux values and store them as the !> near-surface heatflux. !------------------------------------------------------------------------------! SUBROUTINE disturb_heatflux( surf ) USE arrays_3d, & ONLY: heatflux_input_conversion USE control_parameters, & ONLY: iran, surface_heatflux, random_generator, wall_heatflux USE cpulog, & ONLY: cpu_log, log_point USE kinds USE indices, & ONLY: nzb USE random_generator_parallel, & ONLY: random_number_parallel, random_seed_parallel, random_dummy, & id_random_array, seq_random_array USE surface_mod, & ONLY: surf_type IMPLICIT NONE INTEGER(iwp) :: i !< grid index, x direction INTEGER(iwp) :: j !< grid index, y direction INTEGER(iwp) :: k !< grid index, z direction INTEGER(iwp) :: m !< loop variables over surface elements REAL(wp) :: random_gauss !< REAL(wp) :: randomnumber !< TYPE(surf_type) :: surf !< surface-type variable CALL cpu_log( log_point(23), 'disturb_heatflux', 'start' ) ! !-- Generate random disturbances and store them. Note, if !-- random_generator /= 'random-parallel' it is not guaranteed to obtain !-- the same random distribution if the number of processors is changed. IF ( random_generator /= 'random-parallel' ) THEN DO m = 1, surf%ns k = surf%k(m) randomnumber = random_gauss( iran, 5.0_wp ) ! !-- k-1 is topography top index. If this is 0, set surface heatflux. Over !-- topography surface_heatflux is replaced by wall_heatflux(0). IF ( k-1 == 0 ) THEN surf%shf(m) = randomnumber * surface_heatflux & * heatflux_input_conversion(nzb) ELSE surf%shf(m) = randomnumber * wall_heatflux(0) & * heatflux_input_conversion(k-1) ENDIF ENDDO ELSE DO m = 1, surf%ns i = surf%i(m) j = surf%j(m) k = surf%k(m) CALL random_seed_parallel( put=seq_random_array(:, j, i) ) CALL random_number_parallel( random_dummy ) ! !-- k-1 is topography top index. If this is 0, set surface heatflux. Over !-- topography surface_heatflux is replaced by wall_heatflux(0). IF ( k-1 == 0 ) THEN surf%shf(m) = ( random_dummy - 0.5_wp ) * surface_heatflux & * heatflux_input_conversion(nzb) ELSE surf%shf(m) = ( random_dummy - 0.5_wp ) * wall_heatflux(0) & * heatflux_input_conversion(k-1) ENDIF CALL random_seed_parallel( get=seq_random_array(:, j, i) ) ENDDO ENDIF CALL cpu_log( log_point(23), 'disturb_heatflux', 'stop' ) END SUBROUTINE disturb_heatflux