!> @file disturb_heatflux.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 1997-2019 Leibniz Universitaet Hannover !------------------------------------------------------------------------------! ! ! Current revisions: ! ------------------ ! ! ! Former revisions: ! ----------------- ! $Id: disturb_heatflux.f90 4182 2019-08-22 15:20:23Z suehring $ ! Corrected "Former revisions" section ! ! 3761 2019-02-25 15:31:42Z raasch ! unsed variables removed ! ! 3719 2019-02-06 13:10:18Z kanani ! Moved log_points out of subroutine into time_integration for better overview. ! ! 3655 2019-01-07 16:51:22Z knoop ! unused variable removed ! ! 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 kinds USE indices, & ONLY: nzb USE random_generator_parallel, & ONLY: random_number_parallel, random_seed_parallel, random_dummy, & 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 ! !-- 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 END SUBROUTINE disturb_heatflux