1 | !> @file init_pt_anomaly.f90 |
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2 | !------------------------------------------------------------------------------! |
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3 | ! This file is part of the PALM model system. |
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4 | ! |
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5 | ! PALM is free software: you can redistribute it and/or modify it under the |
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6 | ! terms of the GNU General Public License as published by the Free Software |
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7 | ! Foundation, either version 3 of the License, or (at your option) any later |
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8 | ! version. |
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9 | ! |
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10 | ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY |
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11 | ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
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12 | ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
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13 | ! |
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14 | ! You should have received a copy of the GNU General Public License along with |
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15 | ! PALM. If not, see <http://www.gnu.org/licenses/>. |
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16 | ! |
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17 | ! Copyright 1997-2019 Leibniz Universitaet Hannover |
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18 | !------------------------------------------------------------------------------! |
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19 | ! |
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20 | ! Current revisions: |
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21 | ! ----------------- |
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22 | ! |
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23 | ! |
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24 | ! Former revisions: |
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25 | ! ----------------- |
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26 | ! $Id: init_pt_anomaly.f90 4346 2019-12-18 11:55:56Z oliver.maas $ |
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27 | ! Introduction of wall_flags_total_0, which currently sets bits based on static |
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28 | ! topography information used in wall_flags_static_0 |
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29 | ! |
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30 | ! 4329 2019-12-10 15:46:36Z motisi |
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31 | ! Renamed wall_flags_0 to wall_flags_static_0 |
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32 | ! |
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33 | ! 4182 2019-08-22 15:20:23Z scharf |
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34 | ! Corrected "Former revisions" section |
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35 | ! |
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36 | ! 3655 2019-01-07 16:51:22Z knoop |
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37 | ! Added topography flags |
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38 | ! |
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39 | ! Revision 1.1 1997/08/29 08:58:56 raasch |
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40 | ! Initial revision |
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41 | ! |
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42 | ! |
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43 | ! Description: |
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44 | ! ------------ |
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45 | !> Impose a temperature perturbation for an advection test. |
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46 | !------------------------------------------------------------------------------! |
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47 | SUBROUTINE init_pt_anomaly |
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48 | |
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49 | |
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50 | USE arrays_3d, & |
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51 | ONLY: pt, zu |
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52 | |
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53 | USE control_parameters |
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54 | |
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55 | USE grid_variables, & |
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56 | ONLY: dx, dy |
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57 | |
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58 | USE indices, & |
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59 | ONLY: nbgp, nx, nxl, nxr, ny, nyn, nys, nzb, nzt, wall_flags_total_0 |
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60 | |
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61 | USE kinds |
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62 | |
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63 | IMPLICIT NONE |
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64 | |
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65 | INTEGER(iwp) :: i !< grid index along x |
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66 | INTEGER(iwp) :: ic !< center index along x |
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67 | INTEGER(iwp) :: j !< grid index along y |
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68 | INTEGER(iwp) :: jc !< center index along y |
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69 | INTEGER(iwp) :: k !< grid index along z |
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70 | INTEGER(iwp) :: kc !< center index along z |
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71 | |
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72 | REAL(wp) :: amount !< amount of temperature perturbation |
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73 | REAL(wp) :: bubble_center_y !< center of bubble in y |
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74 | REAL(wp) :: bubble_center_z = 170.0 !< center of bubble in z |
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75 | REAL(wp) :: bubble_sigma_y = 300.0 !< width of bubble in y |
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76 | REAL(wp) :: bubble_sigma_z = 150.0 !< width of bubble in z |
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77 | REAL(wp) :: flag !< flag to mask topography grid points |
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78 | REAL(wp) :: initial_temperature_difference = 0.4 !< temperature perturbation for bubble in K |
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79 | REAL(wp) :: radius !< radius of pt anomaly |
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80 | REAL(wp) :: rc !< radius of pt anomaly |
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81 | REAL(wp) :: x !< x dimension of pt anomaly |
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82 | REAL(wp) :: y !< y dimension of pt anomaly |
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83 | REAL(wp) :: z !< z dimension of pt anomaly |
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84 | |
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85 | |
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86 | ! |
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87 | !-- Defaults: radius rc, strength z, |
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88 | !-- position of center: ic, jc, kc |
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89 | rc = 10.0_wp * dx |
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90 | ic = ( nx+1 ) / 2 |
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91 | jc = ic |
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92 | kc = nzt / 2 |
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93 | |
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94 | IF ( INDEX( initializing_actions, 'initialize_ptanom' ) /= 0 ) THEN |
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95 | ! |
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96 | !-- Compute the perturbation. |
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97 | DO i = nxl, nxr |
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98 | DO j = nys, nyn |
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99 | DO k = nzb+1, nzt |
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100 | ! |
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101 | !-- Predetermine flag to mask topography |
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102 | flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 0 ) ) |
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103 | |
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104 | x = ( i - ic ) * dx |
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105 | y = ( j - jc ) * dy |
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106 | z = ABS( zu(k) - zu(kc) ) |
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107 | radius = SQRT( x**2 + y**2 + z**2 ) |
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108 | IF ( radius <= rc ) THEN |
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109 | amount = 5.0_wp * EXP( -( radius * 0.001_wp / 2.0_wp )**2 ) |
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110 | ELSE |
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111 | amount = 0.0_wp |
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112 | ENDIF |
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113 | |
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114 | pt(k,j,i) = pt(k,j,i) + amount * flag |
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115 | |
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116 | ENDDO |
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117 | ENDDO |
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118 | ENDDO |
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119 | |
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120 | ! |
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121 | !-- Initialize warm air bubble close to surface and homogenous elegonated |
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122 | !-- along x-Axis |
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123 | ELSEIF ( INDEX( initializing_actions, 'initialize_bubble' ) /= 0 ) THEN |
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124 | ! |
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125 | !-- Calculate y-center of model domain |
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126 | bubble_center_y = ( ny + 1.0 ) * dy / 2.0 |
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127 | |
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128 | ! |
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129 | !-- Compute perturbation for potential temperaure |
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130 | DO i = nxl, nxr |
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131 | DO j = nys, nyn |
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132 | DO k = nzb+1, nzt |
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133 | ! |
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134 | !-- Predetermine flag to mask topography |
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135 | flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 0 ) ) |
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136 | |
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137 | pt(k,j,i) = pt(k,j,i) + & |
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138 | EXP( -0.5 * ( (j* dy - bubble_center_y) / & |
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139 | bubble_sigma_y )**2) * & |
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140 | EXP( -0.5 * ( (zu(k) - bubble_center_z) / & |
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141 | bubble_sigma_z)**2) * & |
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142 | initial_temperature_difference * flag |
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143 | ENDDO |
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144 | ENDDO |
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145 | ENDDO |
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146 | ENDIF |
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147 | |
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148 | ! |
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149 | !-- Exchange of boundary values for temperature |
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150 | CALL exchange_horiz( pt, nbgp ) |
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151 | |
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152 | |
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153 | END SUBROUTINE init_pt_anomaly |
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