1 | !> @synthetic_turbulence_generator_mod.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 2017 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: synthetic_turbulence_generator_mod.f90 2776 2018-01-31 10:44:42Z Giersch $ |
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27 | ! Variable synthetic_turbulence_generator use_synthetic_turbulence_generator has |
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28 | ! been abbreviated + syn_turb_gen_prerun flag is used to define if module |
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29 | ! related parameters were outputted as restart data |
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30 | ! |
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31 | ! 2716 2017-12-29 16:35:59Z kanani |
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32 | ! Corrected "Former revisions" section |
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33 | ! |
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34 | ! 2696 2017-12-14 17:12:51Z kanani |
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35 | ! Change in file header (GPL part) |
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36 | ! |
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37 | ! 2669 2017-12-06 16:03:27Z raasch |
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38 | ! unit number for file containing turbulence generator data changed to 90 |
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39 | ! bugfix: preprocessor directives added for MPI specific code |
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40 | ! |
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41 | ! 2576 2017-10-24 13:49:46Z Giersch |
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42 | ! Definition of a new function called stg_skip_var_list to skip module |
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43 | ! parameters during reading restart data |
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44 | ! |
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45 | ! 2563 2017-10-19 15:36:10Z Giersch |
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46 | ! stg_read_restart_data is called in stg_parin in the case of a restart run |
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47 | ! |
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48 | ! 2259 2017-06-08 09:09:11Z gronemeier |
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49 | ! Initial revision |
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50 | ! |
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51 | ! |
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52 | ! |
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53 | ! Authors: |
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54 | ! -------- |
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55 | ! @author Tobias Gronemeier, Atsushi Inagaki, Micha Gryschka, Christoph Knigge |
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56 | ! |
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57 | ! |
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58 | ! Description: |
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59 | ! ------------ |
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60 | !> The module generates turbulence at the inflow boundary based on a method by |
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61 | !> Xie and Castro (2008) utilizing a Lund rotation (Lund, 1998) and a mass-flux |
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62 | !> correction by Kim et al. (2013). |
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63 | !> The turbulence is correlated based on length scales in y- and z-direction and |
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64 | !> a time scale for each velocity component. The profiles of length and time |
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65 | !> scales, mean u, v, w, e and pt, and all components of the Reynolds stress |
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66 | !> tensor are read from file STG_PROFILES. |
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67 | !> |
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68 | !> @todo test restart |
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69 | !> enable cyclic_fill |
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70 | !> implement turbulence generation for e and pt |
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71 | !> @note <Enter notes on the module> |
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72 | !> @bug Height information from input file is not used. Profiles from input |
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73 | !> must match with current PALM grid. |
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74 | !> Transformation of length scales to number of gridpoints does not |
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75 | !> consider grid stretching. |
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76 | !> In case of restart, velocity seeds differ from precursor run if a11, |
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77 | !> a22, or a33 are zero. |
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78 | !------------------------------------------------------------------------------! |
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79 | MODULE synthetic_turbulence_generator_mod |
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80 | |
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81 | |
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82 | USE arrays_3d, & |
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83 | ONLY: mean_inflow_profiles, u, v, w |
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84 | |
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85 | USE constants, & |
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86 | ONLY: pi |
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87 | |
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88 | USE control_parameters, & |
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89 | ONLY: initializing_actions, message_string, & |
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90 | syn_turb_gen, syn_turb_gen_prerun |
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91 | |
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92 | USE cpulog, & |
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93 | ONLY: cpu_log, log_point, log_point_s |
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94 | |
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95 | USE indices, & |
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96 | ONLY: nbgp, nzb, nzt, nyng, nysg |
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97 | |
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98 | USE kinds |
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99 | |
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100 | USE MPI |
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101 | |
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102 | USE pegrid, & |
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103 | ONLY: comm1dx, comm1dy, comm2d, id_inflow, ierr, myidx, pdims |
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104 | |
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105 | USE transpose_indices, & |
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106 | ONLY: nzb_x, nzt_x |
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107 | |
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108 | |
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109 | IMPLICIT NONE |
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110 | |
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111 | LOGICAL :: velocity_seed_initialized = .FALSE. !< true after first call of stg_main |
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112 | LOGICAL :: use_syn_turb_gen = .FALSE. !< switch to use synthetic turbulence generator |
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113 | |
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114 | INTEGER(iwp) :: stg_type_yz !< MPI type for full z range |
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115 | INTEGER(iwp) :: stg_type_yz_small !< MPI type for small z range |
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116 | INTEGER(iwp) :: merg !< maximum length scale (in gp) |
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117 | INTEGER(iwp) :: mergp !< merg + nbgp |
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118 | |
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119 | REAL(wp) :: mc_factor !< mass flux correction factor |
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120 | |
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121 | INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: displs !< displacement for MPI_GATHERV |
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122 | INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: recv_count !< receive count for MPI_GATHERV |
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123 | INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nuy !< length scale of u in y direction (in gp) |
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124 | INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nuz !< length scale of u in z direction (in gp) |
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125 | INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nvy !< length scale of v in y direction (in gp) |
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126 | INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nvz !< length scale of v in z direction (in gp) |
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127 | INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nwy !< length scale of w in y direction (in gp) |
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128 | INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nwz !< length scale of w in z direction (in gp) |
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129 | |
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130 | INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: seed !< seed of random number for rn-generator |
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131 | |
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132 | REAL(wp), DIMENSION(:), ALLOCATABLE :: a11 !< coefficient for Lund rotation |
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133 | REAL(wp), DIMENSION(:), ALLOCATABLE :: a21 !< coefficient for Lund rotation |
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134 | REAL(wp), DIMENSION(:), ALLOCATABLE :: a22 !< coefficient for Lund rotation |
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135 | REAL(wp), DIMENSION(:), ALLOCATABLE :: a31 !< coefficient for Lund rotation |
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136 | REAL(wp), DIMENSION(:), ALLOCATABLE :: a32 !< coefficient for Lund rotation |
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137 | REAL(wp), DIMENSION(:), ALLOCATABLE :: a33 !< coefficient for Lund rotation |
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138 | REAL(wp), DIMENSION(:), ALLOCATABLE :: tu !< Lagrangian time scale of u |
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139 | REAL(wp), DIMENSION(:), ALLOCATABLE :: tv !< Lagrangian time scale of v |
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140 | REAL(wp), DIMENSION(:), ALLOCATABLE :: tw !< Lagrangian time scale of w |
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141 | |
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142 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: buy !< filter function for u in y direction |
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143 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: buz !< filter function for u in z direction |
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144 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: bvy !< filter function for v in y direction |
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145 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: bvz !< filter function for v in z direction |
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146 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: bwy !< filter function for w in y direction |
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147 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: bwz !< filter function for w in z direction |
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148 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fu !< velocity seed for u |
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149 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fuo !< velocity seed for u with new random number |
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150 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fv !< velocity seed for v |
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151 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fvo !< velocity seed for v with new random number |
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152 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fw !< velocity seed for w |
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153 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: fwo !< velocity seed for w with new random number |
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154 | |
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155 | |
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156 | ! |
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157 | !-- PALM interfaces: |
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158 | !-- Input parameter checks to be done in check_parameters |
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159 | INTERFACE stg_check_parameters |
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160 | MODULE PROCEDURE stg_check_parameters |
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161 | END INTERFACE stg_check_parameters |
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162 | |
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163 | ! |
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164 | !-- Calculate filter functions |
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165 | INTERFACE stg_filter_func |
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166 | MODULE PROCEDURE stg_filter_func |
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167 | END INTERFACE stg_filter_func |
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168 | |
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169 | ! |
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170 | !-- Generate velocity seeds |
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171 | INTERFACE stg_generate_seed_yz |
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172 | MODULE PROCEDURE stg_generate_seed_yz |
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173 | END INTERFACE stg_generate_seed_yz |
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174 | |
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175 | ! |
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176 | !-- Output of information to the header file |
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177 | INTERFACE stg_header |
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178 | MODULE PROCEDURE stg_header |
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179 | END INTERFACE stg_header |
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180 | |
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181 | ! |
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182 | !-- Initialization actions |
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183 | INTERFACE stg_init |
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184 | MODULE PROCEDURE stg_init |
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185 | END INTERFACE stg_init |
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186 | |
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187 | ! |
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188 | !-- Main procedure of synth. turb. gen. |
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189 | INTERFACE stg_main |
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190 | MODULE PROCEDURE stg_main |
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191 | END INTERFACE stg_main |
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192 | |
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193 | ! |
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194 | !-- Reading of NAMELIST parameters |
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195 | INTERFACE stg_parin |
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196 | MODULE PROCEDURE stg_parin |
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197 | END INTERFACE stg_parin |
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198 | |
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199 | ! |
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200 | !-- Skipping of parameters for restart runs |
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201 | INTERFACE stg_skip_var_list |
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202 | MODULE PROCEDURE stg_skip_var_list |
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203 | END INTERFACE stg_skip_var_list |
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204 | |
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205 | ! |
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206 | !-- Reading of parameters for restart runs |
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207 | INTERFACE stg_read_restart_data |
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208 | MODULE PROCEDURE stg_read_restart_data |
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209 | END INTERFACE stg_read_restart_data |
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210 | |
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211 | ! |
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212 | !-- Writing of binary output for restart runs |
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213 | INTERFACE stg_write_restart_data |
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214 | MODULE PROCEDURE stg_write_restart_data |
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215 | END INTERFACE stg_write_restart_data |
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216 | |
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217 | SAVE |
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218 | |
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219 | PRIVATE |
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220 | |
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221 | ! |
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222 | !-- Public interfaces |
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223 | PUBLIC stg_check_parameters, stg_header, stg_init, stg_main, stg_parin, & |
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224 | stg_write_restart_data, stg_skip_var_list |
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225 | |
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226 | ! |
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227 | !-- Public variables |
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228 | PUBLIC use_syn_turb_gen |
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229 | |
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230 | |
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231 | CONTAINS |
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232 | |
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233 | |
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234 | !------------------------------------------------------------------------------! |
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235 | ! Description: |
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236 | ! ------------ |
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237 | !> Check parameters routine for synthetic turbulence generator |
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238 | !------------------------------------------------------------------------------! |
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239 | SUBROUTINE stg_check_parameters |
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240 | |
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241 | |
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242 | USE control_parameters, & |
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243 | ONLY: bc_lr, bc_ns, turbulent_inflow |
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244 | |
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245 | |
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246 | IMPLICIT NONE |
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247 | |
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248 | IF ( use_syn_turb_gen ) THEN |
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249 | |
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250 | IF ( INDEX( initializing_actions, 'set_constant_profiles' ) == 0 .AND. & |
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251 | INDEX( initializing_actions, 'read_restart_data' ) == 0 ) THEN |
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252 | message_string = 'Using synthetic turbulence generator ' // & |
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253 | 'requires &initializing_actions = ' // & |
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254 | '"set_constant_profiles" or "read_restart_data"' |
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255 | CALL message( 'stg_check_parameters', 'PA0015', 1, 2, 0, 6, 0 ) |
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256 | ENDIF |
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257 | |
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258 | IF ( bc_lr /= 'dirichlet/radiation' ) THEN |
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259 | message_string = 'Using synthetic turbulence generator ' // & |
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260 | 'requires &bc_lr = "dirichlet/radiation"' |
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261 | CALL message( 'stg_check_parameters', 'PA0035', 1, 2, 0, 6, 0 ) |
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262 | ENDIF |
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263 | IF ( bc_ns /= 'cyclic' ) THEN |
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264 | message_string = 'Using synthetic turbulence generator ' // & |
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265 | 'requires &bc_ns = "cyclic"' |
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266 | CALL message( 'stg_check_parameters', 'PA0037', 1, 2, 0, 6, 0 ) |
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267 | ENDIF |
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268 | IF ( turbulent_inflow ) THEN |
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269 | message_string = 'Using synthetic turbulence generator ' // & |
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270 | 'in combination &with turbulent_inflow = .T. ' // & |
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271 | 'is not allowed' |
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272 | CALL message( 'stg_check_parameters', 'PA0039', 1, 2, 0, 6, 0 ) |
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273 | ENDIF |
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274 | |
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275 | ENDIF |
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276 | |
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277 | END SUBROUTINE stg_check_parameters |
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278 | |
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279 | |
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280 | !------------------------------------------------------------------------------! |
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281 | ! Description: |
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282 | ! ------------ |
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283 | !> Header output for synthetic turbulence generator |
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284 | !------------------------------------------------------------------------------! |
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285 | SUBROUTINE stg_header ( io ) |
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286 | |
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287 | |
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288 | IMPLICIT NONE |
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289 | |
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290 | INTEGER(iwp), INTENT(IN) :: io !< Unit of the output file |
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291 | |
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292 | ! |
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293 | !-- Write synthetic turbulence generator Header |
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294 | WRITE( io, 1 ) |
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295 | IF ( use_syn_turb_gen ) THEN |
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296 | WRITE( io, 2 ) |
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297 | ELSE |
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298 | WRITE( io, 3 ) |
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299 | ENDIF |
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300 | |
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301 | 1 FORMAT (//' Synthetic turbulence generator information:'/ & |
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302 | ' ------------------------------------------'/) |
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303 | 2 FORMAT (' synthetic turbulence generator switched on') |
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304 | 3 FORMAT (' synthetic turbulence generator switched off') |
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305 | |
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306 | END SUBROUTINE stg_header |
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307 | |
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308 | |
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309 | !------------------------------------------------------------------------------! |
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310 | ! Description: |
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311 | ! ------------ |
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312 | !> Initialization of the synthetic turbulence generator |
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313 | !------------------------------------------------------------------------------! |
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314 | SUBROUTINE stg_init |
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315 | |
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316 | |
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317 | USE arrays_3d, & |
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318 | ONLY: u_init, v_init |
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319 | |
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320 | USE control_parameters, & |
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321 | ONLY: coupling_char, dz, e_init |
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322 | |
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323 | USE grid_variables, & |
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324 | ONLY: ddy |
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325 | |
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326 | |
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327 | IMPLICIT NONE |
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328 | |
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329 | #if defined( __parallel ) |
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330 | INTEGER(KIND=MPI_ADDRESS_KIND) :: extent !< extent of new MPI type |
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331 | INTEGER(KIND=MPI_ADDRESS_KIND) :: tob=0 !< dummy variable |
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332 | #endif |
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333 | |
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334 | INTEGER(iwp) :: j !> loop index |
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335 | INTEGER(iwp) :: k !< index |
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336 | INTEGER(iwp) :: newtype !< dummy MPI type |
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337 | INTEGER(iwp) :: realsize !< size of REAL variables |
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338 | INTEGER(iwp) :: nseed !< dimension of random number seed |
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339 | INTEGER(iwp) :: startseed = 1234567890 !< start seed for random number generator |
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340 | |
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341 | ! |
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342 | !-- Dummy variables used for reading profiles |
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343 | REAL(wp) :: d1 !< u profile |
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344 | REAL(wp) :: d2 !< v profile |
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345 | REAL(wp) :: d3 !< w profile |
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346 | REAL(wp) :: d5 !< e profile |
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347 | REAL(wp) :: d11 !< vertical interpolation for a11 |
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348 | REAL(wp) :: d21 !< vertical interpolation for a21 |
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349 | REAL(wp) :: d22 !< vertical interpolation for a22 |
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350 | REAL(wp) :: luy !< length scale for u in y direction |
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351 | REAL(wp) :: luz !< length scale for u in z direction |
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352 | REAL(wp) :: lvy !< length scale for v in y direction |
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353 | REAL(wp) :: lvz !< length scale for v in z direction |
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354 | REAL(wp) :: lwy !< length scale for w in y direction |
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355 | REAL(wp) :: lwz !< length scale for w in z direction |
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356 | REAL(wp) :: zz !< height |
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357 | |
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358 | REAL(wp),DIMENSION(nzb:nzt+1) :: r11 !< Reynolds parameter |
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359 | REAL(wp),DIMENSION(nzb:nzt+1) :: r21 !< Reynolds parameter |
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360 | REAL(wp),DIMENSION(nzb:nzt+1) :: r22 !< Reynolds parameter |
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361 | REAL(wp),DIMENSION(nzb:nzt+1) :: r31 !< Reynolds parameter |
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362 | REAL(wp),DIMENSION(nzb:nzt+1) :: r32 !< Reynolds parameter |
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363 | REAL(wp),DIMENSION(nzb:nzt+1) :: r33 !< Reynolds parameter |
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364 | |
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365 | |
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366 | #if defined( __parallel ) |
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367 | CALL MPI_BARRIER( comm2d, ierr ) |
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368 | #endif |
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369 | |
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370 | CALL cpu_log( log_point(57), 'synthetic_turbulence_gen', 'start' ) |
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371 | |
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372 | IF ( .NOT. ALLOCATED( mean_inflow_profiles ) ) & |
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373 | ALLOCATE( mean_inflow_profiles(nzb:nzt+1,5) ) |
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374 | |
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375 | ALLOCATE ( a11(nzb:nzt+1), a21(nzb:nzt+1), a22(nzb:nzt+1), & |
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376 | a31(nzb:nzt+1), a32(nzb:nzt+1), a33(nzb:nzt+1), & |
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377 | nuy(nzb:nzt+1), nuz(nzb:nzt+1), nvy(nzb:nzt+1), & |
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378 | nvz(nzb:nzt+1), nwy(nzb:nzt+1), nwz(nzb:nzt+1), & |
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379 | tu(nzb:nzt+1), tv(nzb:nzt+1), tw(nzb:nzt+1) ) |
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380 | |
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381 | #if defined( __parallel ) |
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382 | ! |
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383 | !-- Define MPI type used in stg_generate_seed_yz to gather vertical splitted |
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384 | !-- velocity seeds |
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385 | CALL MPI_TYPE_SIZE( MPI_REAL, realsize, ierr ) |
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386 | extent = 1 * realsize |
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387 | |
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388 | ! stg_type_yz: yz-slice with vertical bounds nzb:nzt+1 |
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389 | CALL MPI_TYPE_CREATE_SUBARRAY( 2, [nzt-nzb+2,nyng-nysg+1], & |
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390 | [1,nyng-nysg+1], [0,0], MPI_ORDER_FORTRAN, MPI_REAL, newtype, ierr ) |
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391 | CALL MPI_TYPE_CREATE_RESIZED( newtype, tob, extent, stg_type_yz, ierr ) |
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392 | CALL MPI_TYPE_COMMIT( stg_type_yz, ierr ) |
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393 | CALL MPI_TYPE_FREE( newtype, ierr ) |
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394 | |
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395 | ! stg_type_yz_small: yz-slice with vertical bounds nzb_x:nzt_x+1 |
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396 | CALL MPI_TYPE_CREATE_SUBARRAY( 2, [nzt_x-nzb_x+2,nyng-nysg+1], & |
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397 | [1,nyng-nysg+1], [0,0], MPI_ORDER_FORTRAN, MPI_REAL, newtype, ierr ) |
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398 | CALL MPI_TYPE_CREATE_RESIZED( newtype, tob, extent, stg_type_yz_small, ierr ) |
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399 | CALL MPI_TYPE_COMMIT( stg_type_yz_small, ierr ) |
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400 | CALL MPI_TYPE_FREE( newtype, ierr ) |
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401 | |
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402 | ! receive count and displacement for MPI_GATHERV in stg_generate_seed_yz |
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403 | ALLOCATE( recv_count(pdims(1)), displs(pdims(1)) ) |
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404 | |
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405 | recv_count = nzt_x-nzb_x + 1 |
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406 | recv_count(pdims(1)) = recv_count(pdims(1)) + 1 |
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407 | |
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408 | DO j = 1, pdims(1) |
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409 | displs(j) = 0 + (nzt_x-nzb_x+1) * (j-1) |
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410 | ENDDO |
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411 | #endif |
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412 | |
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413 | ! |
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414 | !-- Define seed of random number |
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415 | CALL RANDOM_SEED() |
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416 | CALL RANDOM_SEED( size=nseed ) |
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417 | ALLOCATE( seed(1:nseed) ) |
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418 | DO j = 1, nseed |
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419 | seed(j) = startseed + j |
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420 | ENDDO |
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421 | CALL RANDOM_SEED(put=seed) |
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422 | |
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423 | ! |
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424 | !-- Read inflow profile |
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425 | !-- Height levels of profiles in input profile is as follows: |
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426 | !-- zu: luy, luz, tu, lvy, lvz, tv, r11, r21, r22, d1, d2, d5 |
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427 | !-- zw: lwy, lwz, tw, r31, r32, r33, d3 |
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428 | !-- WARNING: zz is not used at the moment |
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429 | OPEN( 90, FILE='STG_PROFILES'//TRIM( coupling_char ), STATUS='OLD', & |
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430 | FORM='FORMATTED') |
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431 | |
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432 | ! Skip header |
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433 | READ( 90, * ) |
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434 | |
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435 | DO k = nzb, nzt+1 |
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436 | READ( 90, * ) zz, luy, luz, tu(k), lvy, lvz, tv(k), lwy, lwz, tw(k), & |
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437 | r11(k), r21(k), r22(k), r31(k), r32(k), r33(k), & |
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438 | d1, d2, d3, d5 |
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439 | |
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440 | ! |
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441 | !-- Convert length scales from meter to number of grid points |
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442 | nuy(k) = INT( luy * ddy ) |
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443 | nuz(k) = INT( luz / dz ) |
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444 | nvy(k) = INT( lvy * ddy ) |
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445 | nvz(k) = INT( lvz / dz ) |
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446 | nwy(k) = INT( lwy * ddy ) |
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447 | nwz(k) = INT( lwz / dz ) |
---|
448 | |
---|
449 | ! |
---|
450 | !-- Save Mean inflow profiles |
---|
451 | IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN |
---|
452 | mean_inflow_profiles(k,1) = d1 |
---|
453 | mean_inflow_profiles(k,2) = d2 |
---|
454 | ! mean_inflow_profiles(k,4) = d4 |
---|
455 | mean_inflow_profiles(k,5) = d5 |
---|
456 | ENDIF |
---|
457 | ENDDO |
---|
458 | |
---|
459 | CLOSE( 90 ) |
---|
460 | |
---|
461 | ! |
---|
462 | !-- Assign initial profiles |
---|
463 | u_init = mean_inflow_profiles(:,1) |
---|
464 | v_init = mean_inflow_profiles(:,2) |
---|
465 | ! pt_init = mean_inflow_profiles(:,4) |
---|
466 | e_init = MAXVAL( mean_inflow_profiles(:,5) ) |
---|
467 | |
---|
468 | ! |
---|
469 | !-- Calculate coefficient matrix from Reynolds stress tensor (Lund rotation) |
---|
470 | DO k = nzb, nzt+1 |
---|
471 | IF ( r11(k) > 0.0_wp ) THEN |
---|
472 | a11(k) = SQRT( r11(k) ) |
---|
473 | a21(k) = r21(k) / a11(k) |
---|
474 | ELSE |
---|
475 | a11(k) = 0.0_wp |
---|
476 | a21(k) = 0.0_wp |
---|
477 | ENDIF |
---|
478 | |
---|
479 | a22(k) = r22(k) - a21(k)**2 |
---|
480 | IF ( a22(k) > 0.0_wp ) THEN |
---|
481 | a22(k) = SQRT( a22(k) ) |
---|
482 | a32(k) = ( r32(k) - a21(k) * a31(k) ) / a22(k) |
---|
483 | ELSE |
---|
484 | a22(k) = 0.0_wp |
---|
485 | a32(k) = 0.0_wp |
---|
486 | ENDIF |
---|
487 | |
---|
488 | ! |
---|
489 | !-- a31, a32, a33 must be calculated with interpolated a11, a21, a22 (d11, |
---|
490 | !-- d21, d22) because of different vertical grid |
---|
491 | IF ( k .le. nzt ) THEN |
---|
492 | d11 = 0.5_wp * ( r11(k) + r11(k+1) ) |
---|
493 | IF ( d11 > 0.0_wp ) THEN |
---|
494 | d11 = SQRT( d11 ) |
---|
495 | d21 = ( 0.5_wp * ( r21(k) + r21(k+1) ) ) / d11 |
---|
496 | a31(k) = r31(k) / d11 |
---|
497 | ELSE |
---|
498 | d21 = 0.0_wp |
---|
499 | a31(k) = 0.0_wp |
---|
500 | ENDIF |
---|
501 | |
---|
502 | d22 = 0.5_wp * ( r22(k) + r22(k+1) ) - d21 ** 2 |
---|
503 | IF ( d22 > 0.0_wp ) THEN |
---|
504 | a32(k) = ( r32(k) - d21 * a31(k) ) / SQRT( d22 ) |
---|
505 | ELSE |
---|
506 | a32(k) = 0.0_wp |
---|
507 | ENDIF |
---|
508 | |
---|
509 | a33(k) = r33(k) - a31(k) ** 2 - a32(k) ** 2 |
---|
510 | IF ( a33(k) > 0.0_wp ) THEN |
---|
511 | a33(k) = SQRT( a33(k) ) |
---|
512 | ELSE |
---|
513 | a33(k) = 0.0_wp |
---|
514 | ENDIF |
---|
515 | ELSE |
---|
516 | a31(k) = a31(k-1) |
---|
517 | a32(k) = a32(k-1) |
---|
518 | a33(k) = a33(k-1) |
---|
519 | ENDIF |
---|
520 | |
---|
521 | ENDDO |
---|
522 | |
---|
523 | ! |
---|
524 | !-- Define the size of the filter functions and allocate them. |
---|
525 | merg = 0 |
---|
526 | |
---|
527 | ! arrays must be large enough to cover the largest length scale |
---|
528 | DO k = nzb, nzt+1 |
---|
529 | j = MAX( ABS(nuy(k)), ABS(nuz(k)), & |
---|
530 | ABS(nvy(k)), ABS(nvz(k)), & |
---|
531 | ABS(nwy(k)), ABS(nwz(k)) ) |
---|
532 | IF ( j > merg ) merg = j |
---|
533 | ENDDO |
---|
534 | |
---|
535 | merg = 2 * merg |
---|
536 | mergp = merg + nbgp |
---|
537 | |
---|
538 | ALLOCATE ( buy(-merg:merg,nzb:nzt+1), buz(-merg:merg,nzb:nzt+1), & |
---|
539 | bvy(-merg:merg,nzb:nzt+1), bvz(-merg:merg,nzb:nzt+1), & |
---|
540 | bwy(-merg:merg,nzb:nzt+1), bwz(-merg:merg,nzb:nzt+1) ) |
---|
541 | |
---|
542 | ! |
---|
543 | !-- Allocate velocity seeds |
---|
544 | ALLOCATE ( fu( nzb:nzt+1,nysg:nyng), fuo(nzb:nzt+1,nysg:nyng), & |
---|
545 | fv( nzb:nzt+1,nysg:nyng), fvo(nzb:nzt+1,nysg:nyng), & |
---|
546 | fw( nzb:nzt+1,nysg:nyng), fwo(nzb:nzt+1,nysg:nyng) ) |
---|
547 | |
---|
548 | fu = 0._wp |
---|
549 | fuo = 0._wp |
---|
550 | fv = 0._wp |
---|
551 | fvo = 0._wp |
---|
552 | fw = 0._wp |
---|
553 | fwo = 0._wp |
---|
554 | |
---|
555 | ! |
---|
556 | !-- Create filter functions |
---|
557 | CALL stg_filter_func( nuy, buy ) !filter uy |
---|
558 | CALL stg_filter_func( nuz, buz ) !filter uz |
---|
559 | CALL stg_filter_func( nvy, bvy ) !filter vy |
---|
560 | CALL stg_filter_func( nvz, bvz ) !filter vz |
---|
561 | CALL stg_filter_func( nwy, bwy ) !filter wy |
---|
562 | CALL stg_filter_func( nwz, bwz ) !filter wz |
---|
563 | |
---|
564 | #if defined( __parallel ) |
---|
565 | CALL MPI_BARRIER( comm2d, ierr ) |
---|
566 | #endif |
---|
567 | |
---|
568 | ! |
---|
569 | !-- In case of restart, calculate velocity seeds fu, fv, fw from former |
---|
570 | ! time step. |
---|
571 | ! Bug: fu, fv, fw are different in those heights where a11, a22, a33 |
---|
572 | ! are 0 compared to the prerun. This is mostly for k=nzt+1. |
---|
573 | IF ( TRIM( initializing_actions ) == 'read_restart_data' ) THEN |
---|
574 | IF ( myidx == id_inflow ) THEN |
---|
575 | DO j = nysg, nyng |
---|
576 | DO k = nzb, nzt+1 |
---|
577 | |
---|
578 | IF ( a11(k) .NE. 0._wp ) THEN |
---|
579 | fu(k,j) = ( u(k,j,-1) / mc_factor - & |
---|
580 | mean_inflow_profiles(k,1) ) / a11(k) |
---|
581 | ELSE |
---|
582 | fu(k,j) = 0._wp |
---|
583 | ENDIF |
---|
584 | |
---|
585 | IF ( a22(k) .NE. 0._wp ) THEN |
---|
586 | fv(k,j) = ( v(k,j,-1) / mc_factor - a21(k) * fu(k,j) - & |
---|
587 | mean_inflow_profiles(k,2) ) / a22(k) |
---|
588 | ELSE |
---|
589 | fv(k,j) = 0._wp |
---|
590 | ENDIF |
---|
591 | |
---|
592 | IF ( a33(k) .NE. 0._wp ) THEN |
---|
593 | fw(k,j) = ( w(k,j,-1) / mc_factor - a31(k) * fu(k,j) - & |
---|
594 | a32(k) * fv(k,j) ) / a33(k) |
---|
595 | ELSE |
---|
596 | fw = 0._wp |
---|
597 | ENDIF |
---|
598 | |
---|
599 | ENDDO |
---|
600 | ENDDO |
---|
601 | ENDIF |
---|
602 | ENDIF |
---|
603 | |
---|
604 | CALL cpu_log( log_point(57), 'synthetic_turbulence_gen', 'stop' ) |
---|
605 | |
---|
606 | END SUBROUTINE stg_init |
---|
607 | |
---|
608 | |
---|
609 | !------------------------------------------------------------------------------! |
---|
610 | ! Description: |
---|
611 | ! ------------ |
---|
612 | !> Calculate filter function bxx from length scale nxx following Eg.9 and 10 |
---|
613 | !> (Xie and Castro, 2008) |
---|
614 | !------------------------------------------------------------------------------! |
---|
615 | SUBROUTINE stg_filter_func( nxx, bxx ) |
---|
616 | |
---|
617 | |
---|
618 | IMPLICIT NONE |
---|
619 | |
---|
620 | INTEGER(iwp) :: k !< loop index |
---|
621 | INTEGER(iwp) :: n_k !< length scale nXX in height k |
---|
622 | INTEGER(iwp) :: n_k2 !< n_k * 2 |
---|
623 | INTEGER(iwp) :: nf !< index for length scales |
---|
624 | |
---|
625 | REAL(wp) :: bdenom !< denominator for filter functions bXX |
---|
626 | REAL(wp) :: qsi = 1.0_wp !< minimization factor |
---|
627 | |
---|
628 | INTEGER(iwp), DIMENSION(:) :: nxx(nzb:nzt+1) !< length scale (in gp) |
---|
629 | |
---|
630 | REAL(wp), DIMENSION(:,:) :: bxx(-merg:merg,nzb:nzt+1) !< filter function |
---|
631 | |
---|
632 | |
---|
633 | bxx = 0.0_wp |
---|
634 | |
---|
635 | DO k = nzb, nzt+1 |
---|
636 | bdenom = 0.0_wp |
---|
637 | n_k = nxx(k) |
---|
638 | IF ( n_k /= 0 ) THEN |
---|
639 | n_k2 = n_k * 2 |
---|
640 | |
---|
641 | ! |
---|
642 | !-- ( Eq.10 )^2 |
---|
643 | DO nf = -n_k2, n_k2 |
---|
644 | bdenom = bdenom + EXP( -qsi * pi * ABS(nf) / n_k )**2 |
---|
645 | ENDDO |
---|
646 | |
---|
647 | ! |
---|
648 | !-- ( Eq.9 ) |
---|
649 | bdenom = SQRT( bdenom ) |
---|
650 | DO nf = -n_k2, n_k2 |
---|
651 | bxx(nf,k) = EXP( -qsi * pi * ABS(nf) / n_k ) / bdenom |
---|
652 | ENDDO |
---|
653 | ENDIF |
---|
654 | ENDDO |
---|
655 | |
---|
656 | END SUBROUTINE stg_filter_func |
---|
657 | |
---|
658 | |
---|
659 | !------------------------------------------------------------------------------! |
---|
660 | ! Description: |
---|
661 | ! ------------ |
---|
662 | !> Parin for &stg_par for synthetic turbulence generator |
---|
663 | !------------------------------------------------------------------------------! |
---|
664 | SUBROUTINE stg_parin |
---|
665 | |
---|
666 | |
---|
667 | IMPLICIT NONE |
---|
668 | |
---|
669 | CHARACTER (LEN=80) :: line !< dummy string that contains the current line of the parameter file |
---|
670 | |
---|
671 | |
---|
672 | NAMELIST /stg_par/ use_syn_turb_gen |
---|
673 | |
---|
674 | line = ' ' |
---|
675 | |
---|
676 | ! |
---|
677 | !-- Try to find stg package |
---|
678 | REWIND ( 11 ) |
---|
679 | line = ' ' |
---|
680 | DO WHILE ( INDEX( line, '&stg_par' ) == 0 ) |
---|
681 | READ ( 11, '(A)', END=10 ) line |
---|
682 | ENDDO |
---|
683 | BACKSPACE ( 11 ) |
---|
684 | |
---|
685 | ! |
---|
686 | !-- Read namelist |
---|
687 | READ ( 11, stg_par ) |
---|
688 | |
---|
689 | ! |
---|
690 | !-- Set flag that indicates that the synthetic turbulence generator is switched |
---|
691 | !-- on |
---|
692 | syn_turb_gen = .TRUE. |
---|
693 | |
---|
694 | IF ( TRIM( initializing_actions ) == 'read_restart_data' ) THEN |
---|
695 | CALL stg_read_restart_data |
---|
696 | ENDIF |
---|
697 | |
---|
698 | 10 CONTINUE |
---|
699 | |
---|
700 | END SUBROUTINE stg_parin |
---|
701 | |
---|
702 | |
---|
703 | !------------------------------------------------------------------------------! |
---|
704 | ! Description: |
---|
705 | ! ------------ |
---|
706 | !> Skipping the stg variables from restart-file (binary format). |
---|
707 | !------------------------------------------------------------------------------! |
---|
708 | SUBROUTINE stg_skip_var_list |
---|
709 | |
---|
710 | IMPLICIT NONE |
---|
711 | |
---|
712 | CHARACTER (LEN=1) :: cdum |
---|
713 | CHARACTER (LEN=30) :: variable_chr |
---|
714 | |
---|
715 | READ ( 13 ) variable_chr |
---|
716 | |
---|
717 | DO WHILE ( TRIM( variable_chr ) /= '*** end stg module ***' ) |
---|
718 | |
---|
719 | READ ( 13 ) cdum |
---|
720 | READ ( 13 ) variable_chr |
---|
721 | |
---|
722 | ENDDO |
---|
723 | |
---|
724 | END SUBROUTINE stg_skip_var_list |
---|
725 | |
---|
726 | |
---|
727 | !------------------------------------------------------------------------------! |
---|
728 | ! Description: |
---|
729 | ! ------------ |
---|
730 | !> This routine reads the respective restart data. |
---|
731 | !------------------------------------------------------------------------------! |
---|
732 | SUBROUTINE stg_read_restart_data |
---|
733 | |
---|
734 | |
---|
735 | IMPLICIT NONE |
---|
736 | |
---|
737 | CHARACTER (LEN=30) :: variable_chr !< dummy variable to read string |
---|
738 | |
---|
739 | |
---|
740 | READ ( 13 ) variable_chr |
---|
741 | DO WHILE ( TRIM( variable_chr ) /= '*** end stg module ***' ) |
---|
742 | |
---|
743 | SELECT CASE ( TRIM( variable_chr ) ) |
---|
744 | |
---|
745 | CASE ( 'use_syn_turb_gen' ) |
---|
746 | READ ( 13 ) use_syn_turb_gen |
---|
747 | CASE ( 'mc_factor' ) |
---|
748 | READ ( 13 ) mc_factor |
---|
749 | CASE ( 'syn_turb_gen_prerun' ) |
---|
750 | READ ( 13 ) syn_turb_gen_prerun |
---|
751 | |
---|
752 | END SELECT |
---|
753 | |
---|
754 | READ ( 13 ) variable_chr |
---|
755 | |
---|
756 | ENDDO |
---|
757 | |
---|
758 | END SUBROUTINE stg_read_restart_data |
---|
759 | |
---|
760 | |
---|
761 | !------------------------------------------------------------------------------! |
---|
762 | ! Description: |
---|
763 | ! ------------ |
---|
764 | !> This routine writes the respective restart data. |
---|
765 | !------------------------------------------------------------------------------! |
---|
766 | SUBROUTINE stg_write_restart_data |
---|
767 | |
---|
768 | |
---|
769 | IMPLICIT NONE |
---|
770 | |
---|
771 | syn_turb_gen_prerun = .TRUE. |
---|
772 | |
---|
773 | WRITE ( 14 ) 'use_syn_turb_gen ' |
---|
774 | WRITE ( 14 ) use_syn_turb_gen |
---|
775 | WRITE ( 14 ) 'mc_factor ' |
---|
776 | WRITE ( 14 ) mc_factor |
---|
777 | WRITE ( 14 ) 'syn_turb_gen_prerun ' |
---|
778 | WRITE ( 14 ) syn_turb_gen_prerun |
---|
779 | |
---|
780 | WRITE ( 14 ) '*** end stg module *** ' |
---|
781 | |
---|
782 | END SUBROUTINE stg_write_restart_data |
---|
783 | |
---|
784 | |
---|
785 | !------------------------------------------------------------------------------! |
---|
786 | ! Description: |
---|
787 | ! ------------ |
---|
788 | !> Create turbulent inflow fields for u, v, w with prescribed length scales and |
---|
789 | !> Reynolds stress tensor after a method of Xie and Castro (2008), modified |
---|
790 | !> following suggestions of Kim et al. (2013), and using a Lund rotation |
---|
791 | !> (Lund, 1998). |
---|
792 | !------------------------------------------------------------------------------! |
---|
793 | SUBROUTINE stg_main |
---|
794 | |
---|
795 | |
---|
796 | USE arrays_3d, & |
---|
797 | ONLY: dzw |
---|
798 | |
---|
799 | USE control_parameters, & |
---|
800 | ONLY: dt_3d, intermediate_timestep_count, simulated_time, & |
---|
801 | volume_flow_initial |
---|
802 | |
---|
803 | USE indices, & |
---|
804 | ONLY: nyn, nys |
---|
805 | |
---|
806 | USE statistics, & |
---|
807 | ONLY: weight_substep |
---|
808 | |
---|
809 | |
---|
810 | IMPLICIT NONE |
---|
811 | |
---|
812 | INTEGER(iwp) :: j !< loop index in y-direction |
---|
813 | INTEGER(iwp) :: k !< loop index in z-direction |
---|
814 | |
---|
815 | REAL(wp) :: dt_stg !< wheighted subtimestep |
---|
816 | REAL(wp) :: mc_factor_l !< local mass flux correction factor |
---|
817 | |
---|
818 | REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng,5,nbgp) :: inflow_dist !< disturbance for inflow profiles |
---|
819 | |
---|
820 | |
---|
821 | CALL cpu_log( log_point(57), 'synthetic_turbulence_gen', 'start' ) |
---|
822 | |
---|
823 | ! |
---|
824 | !-- Calculate time step which is needed for filter functions |
---|
825 | dt_stg = dt_3d * weight_substep(intermediate_timestep_count) |
---|
826 | |
---|
827 | ! |
---|
828 | !-- Initial value of fu, fv, fw |
---|
829 | IF ( simulated_time == 0.0_wp .AND. .NOT. velocity_seed_initialized ) THEN |
---|
830 | CALL stg_generate_seed_yz( nuy, nuz, buy, buz, fu ) |
---|
831 | CALL stg_generate_seed_yz( nvy, nvz, bvy, bvz, fv ) |
---|
832 | CALL stg_generate_seed_yz( nwy, nwz, bwy, bwz, fw ) |
---|
833 | velocity_seed_initialized = .TRUE. |
---|
834 | ENDIF |
---|
835 | ! |
---|
836 | !-- New set of fu, fv, fw |
---|
837 | CALL stg_generate_seed_yz( nuy, nuz, buy, buz, fuo ) |
---|
838 | CALL stg_generate_seed_yz( nvy, nvz, bvy, bvz, fvo ) |
---|
839 | CALL stg_generate_seed_yz( nwy, nwz, bwy, bwz, fwo ) |
---|
840 | |
---|
841 | IF ( myidx == id_inflow ) THEN |
---|
842 | |
---|
843 | DO j = nysg, nyng |
---|
844 | DO k = nzb, nzt + 1 |
---|
845 | ! |
---|
846 | !-- Update fu, fv, fw following Eq. 14 of Xie and Castro (2008) |
---|
847 | IF ( tu(k) == 0.0_wp ) THEN |
---|
848 | fu(k,j) = fuo(k,j) |
---|
849 | ELSE |
---|
850 | fu(k,j) = fu(k,j) * EXP( -pi * dt_stg * 0.5_wp / tu(k) ) + & |
---|
851 | fuo(k,j) * SQRT( 1.0_wp - EXP( -pi * dt_stg / tu(k) ) ) |
---|
852 | ENDIF |
---|
853 | |
---|
854 | IF ( tv(k) == 0.0_wp ) THEN |
---|
855 | fv(k,j) = fvo(k,j) |
---|
856 | ELSE |
---|
857 | fv(k,j) = fv(k,j) * EXP( -pi * dt_stg * 0.5_wp / tv(k) ) + & |
---|
858 | fvo(k,j) * SQRT( 1.0_wp - EXP( -pi * dt_stg / tv(k) ) ) |
---|
859 | ENDIF |
---|
860 | |
---|
861 | IF ( tw(k) == 0.0_wp ) THEN |
---|
862 | fw(k,j) = fwo(k,j) |
---|
863 | ELSE |
---|
864 | fw(k,j) = fw(k,j) * EXP( -pi * dt_stg * 0.5_wp / tw(k) ) + & |
---|
865 | fwo(k,j) * SQRT( 1.0_wp - EXP( -pi * dt_stg / tw(k) ) ) |
---|
866 | ENDIF |
---|
867 | ! |
---|
868 | !-- Lund rotation following Eq. 17 in Xie and Castro (2008). |
---|
869 | !-- Additional factors are added to improve the variance of v and w |
---|
870 | IF( k == 0 ) THEN |
---|
871 | inflow_dist(k,j,1,1) = 0.0_wp |
---|
872 | inflow_dist(k,j,2,1) = 0.0_wp |
---|
873 | inflow_dist(k,j,3,1) = 0.0_wp |
---|
874 | inflow_dist(k,j,4,1) = 0.0_wp |
---|
875 | inflow_dist(k,j,5,1) = 0.0_wp |
---|
876 | ELSE |
---|
877 | inflow_dist(k,j,1,1) = a11(k) * fu(k,j) |
---|
878 | !experimental test of 1.2 |
---|
879 | inflow_dist(k,j,2,1) = ( SQRT( a22(k) / MAXVAL(a22) ) & |
---|
880 | * 1.2_wp ) & |
---|
881 | * ( a21(k) * fu(k,j) & |
---|
882 | + a22(k) * fv(k,j) ) |
---|
883 | inflow_dist(k,j,3,1) = ( SQRT(a33(k) / MAXVAL(a33) ) & |
---|
884 | * 1.3_wp ) & |
---|
885 | * ( a31(k) * fu(k,j) & |
---|
886 | + a32(k) * fv(k,j) & |
---|
887 | + a33(k) * fw(k,j) ) |
---|
888 | ! Calculation for pt and e not yet implemented |
---|
889 | inflow_dist(k,j,4,1) = 0.0_wp |
---|
890 | inflow_dist(k,j,5,1) = 0.0_wp |
---|
891 | ENDIF |
---|
892 | |
---|
893 | ENDDO |
---|
894 | ENDDO |
---|
895 | |
---|
896 | ! |
---|
897 | !-- Mass flux correction following Kim et al. (2013) |
---|
898 | !-- This correction factor insures that the mass flux is preserved at the |
---|
899 | !-- inflow boundary |
---|
900 | mc_factor_l = 0.0_wp |
---|
901 | mc_factor = 0.0_wp |
---|
902 | DO j = nys, nyn |
---|
903 | DO k = nzb+1, nzt |
---|
904 | mc_factor_l = mc_factor_l + dzw(k) * & |
---|
905 | ( mean_inflow_profiles(k,1) + inflow_dist(k,j,1,1) ) |
---|
906 | ENDDO |
---|
907 | ENDDO |
---|
908 | |
---|
909 | #if defined( __parallel ) |
---|
910 | CALL MPI_ALLREDUCE( mc_factor_l, mc_factor, & |
---|
911 | 1, MPI_REAL, MPI_SUM, comm1dy, ierr ) |
---|
912 | #else |
---|
913 | mc_factor = mc_factor_l |
---|
914 | #endif |
---|
915 | |
---|
916 | mc_factor = volume_flow_initial(1) / mc_factor |
---|
917 | |
---|
918 | ! |
---|
919 | !-- Add disturbance at the inflow |
---|
920 | DO j = nysg, nyng |
---|
921 | DO k = nzb, nzt+1 |
---|
922 | u(k,j,-nbgp+1:0) = ( mean_inflow_profiles(k,1) + & |
---|
923 | inflow_dist(k,j,1,1) ) * mc_factor |
---|
924 | v(k,j,-nbgp:-1) = ( mean_inflow_profiles(k,2) + & |
---|
925 | inflow_dist(k,j,2,1) ) * mc_factor |
---|
926 | w(k,j,-nbgp:-1) = inflow_dist(k,j,3,1) * mc_factor |
---|
927 | ENDDO |
---|
928 | ENDDO |
---|
929 | |
---|
930 | ENDIF |
---|
931 | |
---|
932 | CALL cpu_log( log_point(57), 'synthetic_turbulence_gen', 'stop' ) |
---|
933 | |
---|
934 | END SUBROUTINE stg_main |
---|
935 | |
---|
936 | |
---|
937 | !------------------------------------------------------------------------------! |
---|
938 | ! Description: |
---|
939 | ! ------------ |
---|
940 | !> Generate a set of random number rand_it wich is equal on each PE |
---|
941 | !> and calculate the velocity seed f_n. |
---|
942 | !> f_n is splitted in vertical direction by the number of PEs in x-direction and |
---|
943 | !> and each PE calculates a vertical subsection of f_n. At the the end, all |
---|
944 | !> parts are collected to form the full array. |
---|
945 | !------------------------------------------------------------------------------! |
---|
946 | SUBROUTINE stg_generate_seed_yz( n_y, n_z, b_y, b_z, f_n ) |
---|
947 | |
---|
948 | |
---|
949 | USE indices, & |
---|
950 | ONLY: ny |
---|
951 | |
---|
952 | |
---|
953 | IMPLICIT NONE |
---|
954 | |
---|
955 | INTEGER(iwp) :: j !< loop index in y-direction |
---|
956 | INTEGER(iwp) :: jj !< loop index in y-direction |
---|
957 | INTEGER(iwp) :: k !< loop index in z-direction |
---|
958 | INTEGER(iwp) :: kk !< loop index in z-direction |
---|
959 | INTEGER(iwp) :: send_count !< send count for MPI_GATHERV |
---|
960 | |
---|
961 | INTEGER(iwp), DIMENSION(nzb:nzt+1) :: n_y !< length scale in y-direction |
---|
962 | INTEGER(iwp), DIMENSION(nzb:nzt+1) :: n_z !< length scale in z-direction |
---|
963 | INTEGER(iwp), DIMENSION(nzb:nzt+1) :: n_y2 !< n_y*2 |
---|
964 | INTEGER(iwp), DIMENSION(nzb:nzt+1) :: n_z2 !< n_z*2 |
---|
965 | |
---|
966 | REAL(wp) :: nyz_inv !< inverse of number of grid points in yz-slice |
---|
967 | REAL(wp) :: rand_av !< average of random number |
---|
968 | REAL(wp) :: rand_sigma_inv !< inverse of stdev of random number |
---|
969 | |
---|
970 | REAL(wp), DIMENSION(-merg:merg,nzb:nzt+1) :: b_y !< filter func in y-dir |
---|
971 | REAL(wp), DIMENSION(-merg:merg,nzb:nzt+1) :: b_z !< filter func in z-dir |
---|
972 | REAL(wp), DIMENSION(nzb_x:nzt_x+1,nysg:nyng) :: f_n_l !< local velocity seed |
---|
973 | REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng) :: f_n !< velocity seed |
---|
974 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: rand_it !< random number |
---|
975 | |
---|
976 | |
---|
977 | ! |
---|
978 | !-- Generate random numbers using a seed generated in stg_init. |
---|
979 | !-- The set of random numbers are modified to have an average of 0 and |
---|
980 | !-- unit variance. |
---|
981 | ALLOCATE( rand_it(nzb-mergp:nzt+1+mergp,-mergp:ny+mergp) ) |
---|
982 | |
---|
983 | rand_av = 0.0_wp |
---|
984 | rand_sigma_inv = 0.0_wp |
---|
985 | nyz_inv = 1.0_wp / REAL( ( nzt+1 - nzb+1 ) * ( ny+1 ), KIND=wp ) |
---|
986 | |
---|
987 | DO j = 0, ny |
---|
988 | DO k = nzb, nzt+1 |
---|
989 | CALL RANDOM_NUMBER( rand_it(k,j) ) |
---|
990 | rand_av = rand_av + rand_it(k,j) |
---|
991 | ENDDO |
---|
992 | ENDDO |
---|
993 | |
---|
994 | rand_av = rand_av * nyz_inv |
---|
995 | |
---|
996 | DO j = 0, ny |
---|
997 | DO k = nzb, nzt+1 |
---|
998 | rand_it(k,j) = rand_it(k,j) - rand_av |
---|
999 | rand_sigma_inv = rand_sigma_inv + rand_it(k,j) ** 2 |
---|
1000 | ENDDO |
---|
1001 | ENDDO |
---|
1002 | |
---|
1003 | rand_sigma_inv = 1.0_wp / SQRT(rand_sigma_inv * nyz_inv) |
---|
1004 | |
---|
1005 | DO j = 0, ny |
---|
1006 | DO k = nzb, nzt+1 |
---|
1007 | rand_it(k,j) = rand_it(k,j) * rand_sigma_inv |
---|
1008 | ENDDO |
---|
1009 | ENDDO |
---|
1010 | |
---|
1011 | ! |
---|
1012 | !-- Periodic fill of random number in space |
---|
1013 | DO j = 0, ny |
---|
1014 | DO k = 1, mergp |
---|
1015 | rand_it(nzb -k,j) = rand_it(nzt+2-k,j) ! bottom margin |
---|
1016 | rand_it(nzt+1+k,j) = rand_it(nzb+k-1,j) ! top margin |
---|
1017 | ENDDO |
---|
1018 | ENDDO |
---|
1019 | DO j = 1, mergp |
---|
1020 | DO k = nzb-mergp, nzt+1+mergp |
---|
1021 | rand_it(k, -j) = rand_it(k,ny-j+1) ! south margin |
---|
1022 | rand_it(k,ny+j) = rand_it(k, j-1) ! north margin |
---|
1023 | ENDDO |
---|
1024 | ENDDO |
---|
1025 | |
---|
1026 | ! |
---|
1027 | !-- Generate velocity seed following Eq.6 of Xie and Castro (2008) |
---|
1028 | n_y2 = n_y * 2 |
---|
1029 | n_z2 = n_z * 2 |
---|
1030 | f_n_l = 0.0_wp |
---|
1031 | |
---|
1032 | DO j = nysg, nyng |
---|
1033 | DO k = nzb_x, nzt_x+1 |
---|
1034 | DO jj = -n_y2(k), n_y2(k) |
---|
1035 | DO kk = -n_z2(k), n_z2(k) |
---|
1036 | f_n_l(k,j) = f_n_l(k,j) & |
---|
1037 | + b_y(jj,k) * b_z(kk,k) * rand_it(k+kk,j+jj) |
---|
1038 | ENDDO |
---|
1039 | ENDDO |
---|
1040 | ENDDO |
---|
1041 | ENDDO |
---|
1042 | |
---|
1043 | DEALLOCATE( rand_it ) |
---|
1044 | |
---|
1045 | ! |
---|
1046 | !-- Gather velocity seeds of full subdomain |
---|
1047 | send_count = nzt_x - nzb_x + 1 |
---|
1048 | IF ( nzt_x == nzt ) send_count = send_count + 1 |
---|
1049 | |
---|
1050 | #if defined( __parallel ) |
---|
1051 | CALL MPI_GATHERV( f_n_l(nzb_x,nysg), send_count, stg_type_yz_small, & |
---|
1052 | f_n(nzb+1,nysg), recv_count, displs, stg_type_yz, & |
---|
1053 | id_inflow, comm1dx, ierr ) |
---|
1054 | #else |
---|
1055 | f_n(nzb+1:nzt+1,nysg:nyng) = f_n_l(nzb_x:nzt_x+1,nysg:nyng) |
---|
1056 | #endif |
---|
1057 | |
---|
1058 | |
---|
1059 | END SUBROUTINE stg_generate_seed_yz |
---|
1060 | |
---|
1061 | END MODULE synthetic_turbulence_generator_mod |
---|