!> @file init_pt_anomaly.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: init_pt_anomaly.f90 4182 2019-08-22 15:20:23Z suehring $ ! Corrected "Former revisions" section ! ! 3655 2019-01-07 16:51:22Z knoop ! Added topography flags ! ! Revision 1.1 1997/08/29 08:58:56 raasch ! Initial revision ! ! ! Description: ! ------------ !> Impose a temperature perturbation for an advection test. !------------------------------------------------------------------------------! SUBROUTINE init_pt_anomaly USE arrays_3d, & ONLY: pt, zu USE control_parameters USE grid_variables, & ONLY: dx, dy USE indices, & ONLY: nbgp, nx, nxl, nxr, ny, nyn, nys, nzb, nzt, wall_flags_0 USE kinds IMPLICIT NONE INTEGER(iwp) :: i !< grid index along x INTEGER(iwp) :: ic !< center index along x INTEGER(iwp) :: j !< grid index along y INTEGER(iwp) :: jc !< center index along y INTEGER(iwp) :: k !< grid index along z INTEGER(iwp) :: kc !< center index along z REAL(wp) :: amount !< amount of temperature perturbation REAL(wp) :: bubble_center_y !< center of bubble in y REAL(wp) :: bubble_center_z = 170.0 !< center of bubble in z REAL(wp) :: bubble_sigma_y = 300.0 !< width of bubble in y REAL(wp) :: bubble_sigma_z = 150.0 !< width of bubble in z REAL(wp) :: flag !< flag to mask topography grid points REAL(wp) :: initial_temperature_difference = 0.4 !< temperature perturbation for bubble in K REAL(wp) :: radius !< radius of pt anomaly REAL(wp) :: rc !< radius of pt anomaly REAL(wp) :: x !< x dimension of pt anomaly REAL(wp) :: y !< y dimension of pt anomaly REAL(wp) :: z !< z dimension of pt anomaly ! !-- Defaults: radius rc, strength z, !-- position of center: ic, jc, kc rc = 10.0_wp * dx ic = ( nx+1 ) / 2 jc = ic kc = nzt / 2 IF ( INDEX( initializing_actions, 'initialize_ptanom' ) /= 0 ) THEN ! !-- Compute the perturbation. DO i = nxl, nxr DO j = nys, nyn DO k = nzb+1, nzt ! !-- Predetermine flag to mask topography flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_0(k,j,i), 0 ) ) 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 amount = 5.0_wp * EXP( -( radius * 0.001_wp / 2.0_wp )**2 ) ELSE amount = 0.0_wp ENDIF pt(k,j,i) = pt(k,j,i) + amount * flag ENDDO ENDDO ENDDO ! !-- Initialize warm air bubble close to surface and homogenous elegonated !-- along x-Axis ELSEIF ( INDEX( initializing_actions, 'initialize_bubble' ) /= 0 ) THEN ! !-- Calculate y-center of model domain bubble_center_y = ( ny + 1.0 ) * dy / 2.0 ! !-- Compute perturbation for potential temperaure DO i = nxl, nxr DO j = nys, nyn DO k = nzb+1, nzt ! !-- Predetermine flag to mask topography flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_0(k,j,i), 0 ) ) pt(k,j,i) = pt(k,j,i) + & EXP( -0.5 * ( (j* dy - bubble_center_y) / & bubble_sigma_y )**2) * & EXP( -0.5 * ( (zu(k) - bubble_center_z) / & bubble_sigma_z)**2) * & initial_temperature_difference * flag ENDDO ENDDO ENDDO ENDIF ! !-- Exchange of boundary values for temperature CALL exchange_horiz( pt, nbgp ) END SUBROUTINE init_pt_anomaly