SUBROUTINE init_pt_anomaly !--------------------------------------------------------------------------------! ! 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 1997-2014 Leibniz Universitaet Hannover !--------------------------------------------------------------------------------! ! ! Current revisions: ! ----------------- ! ! ! Former revisions: ! ----------------- ! $Id: init_pt_anomaly.f90 1354 2014-04-08 15:22:57Z maronga $ ! ! 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) ! ! 861 2012-03-26 14:18:34Z suehring ! Modification of the amplitude to obtain a visible temperature perturbation. ! ! Revision 1.1 1997/08/29 08:58:56 raasch ! Initial revision ! ! ! Description: ! ------------ ! Impose a temperature perturbation for an advection test. !------------------------------------------------------------------------------! USE arrays_3d, & ONLY: pt, zu USE grid_variables, & ONLY: dx, dy USE indices, & ONLY: nbgp, nx, nxl, nxr, nyn, nys, nzb, nzt USE kinds IMPLICIT NONE INTEGER(iwp) :: i !: INTEGER(iwp) :: ic !: INTEGER(iwp) :: j !: INTEGER(iwp) :: jc !: INTEGER(iwp) :: k !: INTEGER(iwp) :: kc !: REAL(wp) :: betrag !: REAL(wp) :: radius !: REAL(wp) :: rc !: REAL(wp) :: x !: REAL(wp) :: y !: REAL(wp) :: z !: ! !-- Defaults: radius rc, strength z, !-- position of centre: ic, jc, kc rc = 10.0_wp * dx ic = ( nx+1 ) / 2 jc = ic kc = nzt / 2 ! !-- Compute the perturbation. DO i = nxl, nxr DO j = nys, nyn DO k = nzb+1, nzt x = ( i - ic ) * dx y = ( j - jc ) * dy z = ABS( zu(k) - zu(kc) ) radius = SQRT( x**2 + y**2 + z**2 ) IF ( radius <= rc ) THEN betrag = 5.0_wp * EXP( -( radius * 0.001_wp / 2.0_wp )**2 ) ELSE betrag = 0.0_wp ENDIF pt(k,j,i) = pt(k,j,i) + betrag ENDDO ENDDO ENDDO ! !-- Exchange of boundary values for temperature CALL exchange_horiz( pt, nbgp ) END SUBROUTINE init_pt_anomaly