!> @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 1997-2016 Leibniz Universitaet Hannover !------------------------------------------------------------------------------! ! ! Current revisions: ! ------------------ ! ! ! Former revisions: ! ----------------- ! $Id: disturb_heatflux.f90 1818 2016-04-06 15:53:27Z suehring $ ! ! 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. !> On parallel computers, too, this random generator is called at all grid points !> of the total array in order to guarantee the same random distribution of the !> total array regardless of the number of processors used during the model run. !------------------------------------------------------------------------------! SUBROUTINE disturb_heatflux USE arrays_3d, & ONLY: shf USE control_parameters, & ONLY: iran, surface_heatflux, wall_heatflux USE cpulog, & ONLY: cpu_log, log_point USE kinds USE indices, & ONLY: nx, nxl, nxr, ny, nyn, nys, nzb_s_inner IMPLICIT NONE INTEGER(iwp) :: j !< INTEGER(iwp) :: i !< REAL(wp) :: random_gauss !< REAL(wp) :: randomnumber !< CALL cpu_log( log_point(23), 'disturb_heatflux', 'start' ) ! !-- Generate random disturbances and store them DO i = 0, nx DO j = 0, ny randomnumber = random_gauss( iran, 5.0_wp ) IF ( nxl <= i .AND. nxr >= i .AND. nys <= j .AND. nyn >= j ) & THEN IF ( nzb_s_inner(j,i) == 0 ) THEN shf(j,i) = randomnumber * surface_heatflux ELSE ! !-- Over topography surface_heatflux is replaced by wall_heatflux(0) shf(j,i) = randomnumber * wall_heatflux(0) ENDIF ENDIF ENDDO ENDDO ! !-- Exchange lateral boundary conditions for the heatflux array CALL exchange_horiz_2d( shf ) CALL cpu_log( log_point(23), 'disturb_heatflux', 'stop' ) END SUBROUTINE disturb_heatflux