| 1 | MODULE lpm_init_mod |
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| 2 | |
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| 3 | !--------------------------------------------------------------------------------! |
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| 4 | ! This file is part of PALM. |
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| 5 | ! |
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| 6 | ! PALM is free software: you can redistribute it and/or modify it under the terms |
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| 7 | ! of the GNU General Public License as published by the Free Software Foundation, |
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| 8 | ! either version 3 of the License, or (at your option) any later 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 1997-2014 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: lpm_init.f90 1576 2015-03-27 10:23:30Z raasch $ |
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| 27 | ! |
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| 28 | ! 1575 2015-03-27 09:56:27Z raasch |
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| 29 | ! initial vertical particle position is allowed to follow the topography |
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| 30 | ! |
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| 31 | ! 1359 2014-04-11 17:15:14Z hoffmann |
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| 32 | ! New particle structure integrated. |
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| 33 | ! Kind definition added to all floating point numbers. |
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| 34 | ! lpm_init changed form a subroutine to a module. |
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| 35 | ! |
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| 36 | ! 1327 2014-03-21 11:00:16Z raasch |
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| 37 | ! -netcdf_output |
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| 38 | ! |
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| 39 | ! 1322 2014-03-20 16:38:49Z raasch |
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| 40 | ! REAL functions provided with KIND-attribute |
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| 41 | ! |
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| 42 | ! 1320 2014-03-20 08:40:49Z raasch |
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| 43 | ! ONLY-attribute added to USE-statements, |
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| 44 | ! kind-parameters added to all INTEGER and REAL declaration statements, |
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| 45 | ! kinds are defined in new module kinds, |
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| 46 | ! revision history before 2012 removed, |
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| 47 | ! comment fields (!:) to be used for variable explanations added to |
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| 48 | ! all variable declaration statements |
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| 49 | ! bugfix: #if defined( __parallel ) added |
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| 50 | ! |
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| 51 | ! 1314 2014-03-14 18:25:17Z suehring |
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| 52 | ! Vertical logarithmic interpolation of horizontal particle speed for particles |
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| 53 | ! between roughness height and first vertical grid level. |
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| 54 | ! |
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| 55 | ! 1092 2013-02-02 11:24:22Z raasch |
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| 56 | ! unused variables removed |
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| 57 | ! |
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| 58 | ! 1036 2012-10-22 13:43:42Z raasch |
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| 59 | ! code put under GPL (PALM 3.9) |
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| 60 | ! |
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| 61 | ! 849 2012-03-15 10:35:09Z raasch |
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| 62 | ! routine renamed: init_particles -> lpm_init |
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| 63 | ! de_dx, de_dy, de_dz are allocated here (instead of automatic arrays in |
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| 64 | ! advec_particles), |
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| 65 | ! sort_particles renamed lpm_sort_arrays, user_init_particles renamed lpm_init |
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| 66 | ! |
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| 67 | ! 828 2012-02-21 12:00:36Z raasch |
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| 68 | ! call of init_kernels, particle feature color renamed class |
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| 69 | ! |
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| 70 | ! 824 2012-02-17 09:09:57Z raasch |
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| 71 | ! particle attributes speed_x|y|z_sgs renamed rvar1|2|3, |
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| 72 | ! array particles implemented as pointer |
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| 73 | ! |
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| 74 | ! 667 2010-12-23 12:06:00Z suehring/gryschka |
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| 75 | ! nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng for allocation |
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| 76 | ! of arrays. |
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| 77 | ! |
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| 78 | ! Revision 1.1 1999/11/25 16:22:38 raasch |
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| 79 | ! Initial revision |
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| 80 | ! |
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| 81 | ! |
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| 82 | ! Description: |
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| 83 | ! ------------ |
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| 84 | ! This routine initializes a set of particles and their attributes (position, |
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| 85 | ! radius, ..) which are used by the Lagrangian particle model (see lpm). |
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| 86 | !------------------------------------------------------------------------------! |
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| 87 | |
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| 88 | USE arrays_3d, & |
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| 89 | ONLY: de_dx, de_dy, de_dz, zu, zw, z0 |
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| 90 | |
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| 91 | USE cloud_parameters, & |
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| 92 | ONLY: curvature_solution_effects |
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| 93 | |
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| 94 | USE control_parameters, & |
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| 95 | ONLY: cloud_droplets, current_timestep_number, dz, & |
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| 96 | initializing_actions, message_string, netcdf_data_format, & |
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| 97 | ocean, prandtl_layer, simulated_time |
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| 98 | |
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| 99 | USE dvrp_variables, & |
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| 100 | ONLY: particle_color, particle_dvrpsize |
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| 101 | |
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| 102 | USE grid_variables, & |
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| 103 | ONLY: ddx, dx, ddy, dy |
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| 104 | |
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| 105 | USE indices, & |
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| 106 | ONLY: nx, nxl, nxlg, nxrg, nxr, ny, nyn, nys, nyng, nysg, nz, nzb, & |
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| 107 | nzb_w_inner, nzt |
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| 108 | |
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| 109 | USE kinds |
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| 110 | |
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| 111 | USE lpm_collision_kernels_mod, & |
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| 112 | ONLY: init_kernels |
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| 113 | |
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| 114 | USE particle_attributes, & |
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| 115 | ONLY: alloc_factor, bc_par_b, bc_par_lr, bc_par_ns, bc_par_t, & |
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| 116 | block_offset, block_offset_def, collision_kernel, & |
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| 117 | density_ratio, dvrp_psize, grid_particles, & |
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| 118 | initial_weighting_factor, ibc_par_b, ibc_par_lr, ibc_par_ns, & |
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| 119 | ibc_par_t, iran_part, log_z_z0, & |
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| 120 | max_number_of_particle_groups, maximum_number_of_particles, & |
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| 121 | maximum_number_of_tailpoints, maximum_number_of_tails, & |
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| 122 | minimum_tailpoint_distance, min_nr_particle, & |
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| 123 | mpi_particle_type, new_tail_id, & |
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| 124 | number_of_initial_tails, number_of_particles, & |
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| 125 | number_of_particle_groups, number_of_sublayers, & |
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| 126 | number_of_tails, offset_ocean_nzt, offset_ocean_nzt_m1, & |
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| 127 | particles, particle_advection_start, particle_groups, & |
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| 128 | particle_groups_type, particles_per_point, & |
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| 129 | particle_tail_coordinates, particle_type, pdx, pdy, pdz, & |
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| 130 | prt_count, psb, psl, psn, psr, pss, pst, & |
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| 131 | radius, random_start_position, read_particles_from_restartfile,& |
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| 132 | seed_follows_topography, skip_particles_for_tail, sort_count, & |
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| 133 | tail_mask, total_number_of_particles, total_number_of_tails, & |
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| 134 | use_particle_tails, use_sgs_for_particles, & |
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| 135 | write_particle_statistics, uniform_particles, zero_particle, & |
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| 136 | z0_av_global |
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| 137 | |
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| 138 | USE pegrid |
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| 139 | |
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| 140 | USE random_function_mod, & |
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| 141 | ONLY: random_function |
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| 142 | |
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| 143 | IMPLICIT NONE |
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| 144 | |
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| 145 | PRIVATE |
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| 146 | |
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| 147 | INTEGER(iwp), PARAMETER :: PHASE_INIT = 1 !: |
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| 148 | INTEGER(iwp), PARAMETER, PUBLIC :: PHASE_RELEASE = 2 !: |
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| 149 | |
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| 150 | INTERFACE lpm_init |
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| 151 | MODULE PROCEDURE lpm_init |
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| 152 | END INTERFACE lpm_init |
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| 153 | |
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| 154 | INTERFACE lpm_create_particle |
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| 155 | MODULE PROCEDURE lpm_create_particle |
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| 156 | END INTERFACE lpm_create_particle |
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| 157 | |
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| 158 | PUBLIC lpm_init, lpm_create_particle |
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| 159 | |
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| 160 | CONTAINS |
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| 161 | |
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| 162 | SUBROUTINE lpm_init |
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| 163 | |
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| 164 | USE lpm_collision_kernels_mod, & |
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| 165 | ONLY: init_kernels |
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| 166 | |
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| 167 | IMPLICIT NONE |
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| 168 | |
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| 169 | INTEGER(iwp) :: i !: |
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| 170 | INTEGER(iwp) :: ip !: |
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| 171 | INTEGER(iwp) :: j !: |
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| 172 | INTEGER(iwp) :: jp !: |
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| 173 | INTEGER(iwp) :: k !: |
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| 174 | INTEGER(iwp) :: kp !: |
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| 175 | INTEGER(iwp) :: n !: |
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| 176 | INTEGER(iwp) :: nn !: |
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| 177 | |
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| 178 | #if defined( __parallel ) |
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| 179 | INTEGER(iwp), DIMENSION(3) :: blocklengths !: |
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| 180 | INTEGER(iwp), DIMENSION(3) :: displacements !: |
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| 181 | INTEGER(iwp), DIMENSION(3) :: types !: |
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| 182 | #endif |
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| 183 | LOGICAL :: uniform_particles_l !: |
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| 184 | |
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| 185 | REAL(wp) :: height_int !: |
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| 186 | REAL(wp) :: height_p !: |
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| 187 | REAL(wp) :: z_p !: |
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| 188 | REAL(wp) :: z0_av_local !: |
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| 189 | |
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| 190 | #if defined( __parallel ) |
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| 191 | ! |
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| 192 | !-- Define MPI derived datatype for FORTRAN datatype particle_type (see module |
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| 193 | !-- particle_attributes). Integer length is 4 byte, Real is 8 byte |
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| 194 | #if defined( __twocachelines ) |
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| 195 | blocklengths(1) = 7; blocklengths(2) = 18; blocklengths(3) = 1 |
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| 196 | displacements(1) = 0; displacements(2) = 64; displacements(3) = 128 |
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| 197 | |
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| 198 | types(1) = MPI_REAL ! 64 bit words |
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| 199 | types(2) = MPI_INTEGER ! 32 Bit words |
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| 200 | types(3) = MPI_UB |
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| 201 | #else |
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| 202 | blocklengths(1) = 19; blocklengths(2) = 6; blocklengths(3) = 1 |
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| 203 | displacements(1) = 0; displacements(2) = 152; displacements(3) = 176 |
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| 204 | |
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| 205 | types(1) = MPI_REAL |
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| 206 | types(2) = MPI_INTEGER |
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| 207 | types(3) = MPI_UB |
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| 208 | #endif |
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| 209 | CALL MPI_TYPE_STRUCT( 3, blocklengths, displacements, types, & |
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| 210 | mpi_particle_type, ierr ) |
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| 211 | CALL MPI_TYPE_COMMIT( mpi_particle_type, ierr ) |
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| 212 | #endif |
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| 213 | |
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| 214 | ! |
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| 215 | !-- In case of oceans runs, the vertical index calculations need an offset, |
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| 216 | !-- because otherwise the k indices will become negative |
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| 217 | IF ( ocean ) THEN |
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| 218 | offset_ocean_nzt = nzt |
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| 219 | offset_ocean_nzt_m1 = nzt - 1 |
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| 220 | ENDIF |
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| 221 | |
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| 222 | ! |
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| 223 | !-- Define block offsets for dividing a gridcell in 8 sub cells |
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| 224 | |
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| 225 | block_offset(0) = block_offset_def (-1,-1,-1) |
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| 226 | block_offset(1) = block_offset_def (-1,-1, 0) |
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| 227 | block_offset(2) = block_offset_def (-1, 0,-1) |
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| 228 | block_offset(3) = block_offset_def (-1, 0, 0) |
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| 229 | block_offset(4) = block_offset_def ( 0,-1,-1) |
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| 230 | block_offset(5) = block_offset_def ( 0,-1, 0) |
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| 231 | block_offset(6) = block_offset_def ( 0, 0,-1) |
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| 232 | block_offset(7) = block_offset_def ( 0, 0, 0) |
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| 233 | ! |
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| 234 | !-- Check the number of particle groups. |
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| 235 | IF ( number_of_particle_groups > max_number_of_particle_groups ) THEN |
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| 236 | WRITE( message_string, * ) 'max_number_of_particle_groups =', & |
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| 237 | max_number_of_particle_groups , & |
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| 238 | '&number_of_particle_groups reset to ', & |
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| 239 | max_number_of_particle_groups |
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| 240 | CALL message( 'lpm_init', 'PA0213', 0, 1, 0, 6, 0 ) |
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| 241 | number_of_particle_groups = max_number_of_particle_groups |
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| 242 | ENDIF |
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| 243 | |
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| 244 | ! |
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| 245 | !-- Set default start positions, if necessary |
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| 246 | IF ( psl(1) == 9999999.9_wp ) psl(1) = -0.5_wp * dx |
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| 247 | IF ( psr(1) == 9999999.9_wp ) psr(1) = ( nx + 0.5_wp ) * dx |
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| 248 | IF ( pss(1) == 9999999.9_wp ) pss(1) = -0.5_wp * dy |
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| 249 | IF ( psn(1) == 9999999.9_wp ) psn(1) = ( ny + 0.5_wp ) * dy |
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| 250 | IF ( psb(1) == 9999999.9_wp ) psb(1) = zu(nz/2) |
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| 251 | IF ( pst(1) == 9999999.9_wp ) pst(1) = psb(1) |
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| 252 | |
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| 253 | IF ( pdx(1) == 9999999.9_wp .OR. pdx(1) == 0.0_wp ) pdx(1) = dx |
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| 254 | IF ( pdy(1) == 9999999.9_wp .OR. pdy(1) == 0.0_wp ) pdy(1) = dy |
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| 255 | IF ( pdz(1) == 9999999.9_wp .OR. pdz(1) == 0.0_wp ) pdz(1) = zu(2) - zu(1) |
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| 256 | |
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| 257 | DO j = 2, number_of_particle_groups |
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| 258 | IF ( psl(j) == 9999999.9_wp ) psl(j) = psl(j-1) |
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| 259 | IF ( psr(j) == 9999999.9_wp ) psr(j) = psr(j-1) |
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| 260 | IF ( pss(j) == 9999999.9_wp ) pss(j) = pss(j-1) |
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| 261 | IF ( psn(j) == 9999999.9_wp ) psn(j) = psn(j-1) |
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| 262 | IF ( psb(j) == 9999999.9_wp ) psb(j) = psb(j-1) |
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| 263 | IF ( pst(j) == 9999999.9_wp ) pst(j) = pst(j-1) |
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| 264 | IF ( pdx(j) == 9999999.9_wp .OR. pdx(j) == 0.0_wp ) pdx(j) = pdx(j-1) |
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| 265 | IF ( pdy(j) == 9999999.9_wp .OR. pdy(j) == 0.0_wp ) pdy(j) = pdy(j-1) |
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| 266 | IF ( pdz(j) == 9999999.9_wp .OR. pdz(j) == 0.0_wp ) pdz(j) = pdz(j-1) |
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| 267 | ENDDO |
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| 268 | |
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| 269 | ! |
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| 270 | !-- Allocate arrays required for calculating particle SGS velocities |
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| 271 | IF ( use_sgs_for_particles ) THEN |
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| 272 | ALLOCATE( de_dx(nzb:nzt+1,nysg:nyng,nxlg:nxrg), & |
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| 273 | de_dy(nzb:nzt+1,nysg:nyng,nxlg:nxrg), & |
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| 274 | de_dz(nzb:nzt+1,nysg:nyng,nxlg:nxrg) ) |
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| 275 | ENDIF |
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| 276 | |
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| 277 | ! |
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| 278 | !-- Allocate array required for logarithmic vertical interpolation of |
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| 279 | !-- horizontal particle velocities between the surface and the first vertical |
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| 280 | !-- grid level. In order to avoid repeated CPU cost-intensive CALLS of |
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| 281 | !-- intrinsic FORTRAN procedure LOG(z/z0), LOG(z/z0) is precalculated for |
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| 282 | !-- several heights. Splitting into 20 sublayers turned out to be sufficient. |
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| 283 | !-- To obtain exact height levels of particles, linear interpolation is applied |
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| 284 | !-- (see lpm_advec.f90). |
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| 285 | IF ( prandtl_layer ) THEN |
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| 286 | |
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| 287 | ALLOCATE ( log_z_z0(0:number_of_sublayers) ) |
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| 288 | z_p = zu(nzb+1) - zw(nzb) |
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| 289 | |
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| 290 | ! |
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| 291 | !-- Calculate horizontal mean value of z0 used for logartihmic |
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| 292 | !-- interpolation. Note: this is not exact for heterogeneous z0. |
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| 293 | !-- However, sensitivity studies showed that the effect is |
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| 294 | !-- negligible. |
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| 295 | z0_av_local = SUM( z0(nys:nyn,nxl:nxr) ) |
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| 296 | z0_av_global = 0.0_wp |
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| 297 | |
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| 298 | #if defined( __parallel ) |
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| 299 | CALL MPI_ALLREDUCE(z0_av_local, z0_av_global, 1, MPI_REAL, MPI_SUM, & |
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| 300 | comm2d, ierr ) |
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| 301 | #else |
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| 302 | z0_av_global = z0_av_local |
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| 303 | #endif |
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| 304 | |
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| 305 | z0_av_global = z0_av_global / ( ( ny + 1 ) * ( nx + 1 ) ) |
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| 306 | ! |
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| 307 | !-- Horizontal wind speed is zero below and at z0 |
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| 308 | log_z_z0(0) = 0.0_wp |
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| 309 | ! |
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| 310 | !-- Calculate vertical depth of the sublayers |
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| 311 | height_int = ( z_p - z0_av_global ) / REAL( number_of_sublayers, KIND=wp ) |
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| 312 | ! |
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| 313 | !-- Precalculate LOG(z/z0) |
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| 314 | height_p = 0.0_wp |
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| 315 | DO k = 1, number_of_sublayers |
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| 316 | |
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| 317 | height_p = height_p + height_int |
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| 318 | log_z_z0(k) = LOG( height_p / z0_av_global ) |
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| 319 | |
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| 320 | ENDDO |
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| 321 | |
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| 322 | |
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| 323 | ENDIF |
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| 324 | |
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| 325 | ! |
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| 326 | !-- Check boundary condition and set internal variables |
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| 327 | SELECT CASE ( bc_par_b ) |
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| 328 | |
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| 329 | CASE ( 'absorb' ) |
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| 330 | ibc_par_b = 1 |
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| 331 | |
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| 332 | CASE ( 'reflect' ) |
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| 333 | ibc_par_b = 2 |
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| 334 | |
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| 335 | CASE DEFAULT |
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| 336 | WRITE( message_string, * ) 'unknown boundary condition ', & |
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| 337 | 'bc_par_b = "', TRIM( bc_par_b ), '"' |
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| 338 | CALL message( 'lpm_init', 'PA0217', 1, 2, 0, 6, 0 ) |
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| 339 | |
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| 340 | END SELECT |
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| 341 | SELECT CASE ( bc_par_t ) |
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| 342 | |
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| 343 | CASE ( 'absorb' ) |
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| 344 | ibc_par_t = 1 |
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| 345 | |
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| 346 | CASE ( 'reflect' ) |
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| 347 | ibc_par_t = 2 |
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| 348 | |
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| 349 | CASE DEFAULT |
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| 350 | WRITE( message_string, * ) 'unknown boundary condition ', & |
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| 351 | 'bc_par_t = "', TRIM( bc_par_t ), '"' |
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| 352 | CALL message( 'lpm_init', 'PA0218', 1, 2, 0, 6, 0 ) |
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| 353 | |
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| 354 | END SELECT |
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| 355 | SELECT CASE ( bc_par_lr ) |
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| 356 | |
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| 357 | CASE ( 'cyclic' ) |
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| 358 | ibc_par_lr = 0 |
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| 359 | |
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| 360 | CASE ( 'absorb' ) |
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| 361 | ibc_par_lr = 1 |
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| 362 | |
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| 363 | CASE ( 'reflect' ) |
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| 364 | ibc_par_lr = 2 |
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| 365 | |
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| 366 | CASE DEFAULT |
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| 367 | WRITE( message_string, * ) 'unknown boundary condition ', & |
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| 368 | 'bc_par_lr = "', TRIM( bc_par_lr ), '"' |
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| 369 | CALL message( 'lpm_init', 'PA0219', 1, 2, 0, 6, 0 ) |
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| 370 | |
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| 371 | END SELECT |
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| 372 | SELECT CASE ( bc_par_ns ) |
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| 373 | |
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| 374 | CASE ( 'cyclic' ) |
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| 375 | ibc_par_ns = 0 |
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| 376 | |
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| 377 | CASE ( 'absorb' ) |
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| 378 | ibc_par_ns = 1 |
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| 379 | |
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| 380 | CASE ( 'reflect' ) |
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| 381 | ibc_par_ns = 2 |
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| 382 | |
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| 383 | CASE DEFAULT |
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| 384 | WRITE( message_string, * ) 'unknown boundary condition ', & |
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| 385 | 'bc_par_ns = "', TRIM( bc_par_ns ), '"' |
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| 386 | CALL message( 'lpm_init', 'PA0220', 1, 2, 0, 6, 0 ) |
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| 387 | |
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| 388 | END SELECT |
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| 389 | |
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| 390 | ! |
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| 391 | !-- Initialize collision kernels |
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| 392 | IF ( collision_kernel /= 'none' ) CALL init_kernels |
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| 393 | |
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| 394 | ! |
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| 395 | !-- For the first model run of a possible job chain initialize the |
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| 396 | !-- particles, otherwise read the particle data from restart file. |
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| 397 | IF ( TRIM( initializing_actions ) == 'read_restart_data' & |
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| 398 | .AND. read_particles_from_restartfile ) THEN |
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| 399 | |
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| 400 | CALL lpm_read_restart_file |
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| 401 | |
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| 402 | ELSE |
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| 403 | |
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| 404 | ! |
|---|
| 405 | !-- Allocate particle arrays and set attributes of the initial set of |
|---|
| 406 | !-- particles, which can be also periodically released at later times. |
|---|
| 407 | !-- Also allocate array for particle tail coordinates, if needed. |
|---|
| 408 | ALLOCATE( prt_count(nzb:nzt+1,nysg:nyng,nxlg:nxrg), & |
|---|
| 409 | grid_particles(nzb+1:nzt,nys:nyn,nxl:nxr) ) |
|---|
| 410 | |
|---|
| 411 | maximum_number_of_particles = 0 |
|---|
| 412 | number_of_particles = 0 |
|---|
| 413 | |
|---|
| 414 | sort_count = 0 |
|---|
| 415 | prt_count = 0 |
|---|
| 416 | |
|---|
| 417 | ! |
|---|
| 418 | !-- Initialize all particles with dummy values (otherwise errors may |
|---|
| 419 | !-- occur within restart runs). The reason for this is still not clear |
|---|
| 420 | !-- and may be presumably caused by errors in the respective user-interface. |
|---|
| 421 | #if defined( __twocachelines ) |
|---|
| 422 | zero_particle = particle_type( 0.0_wp, 0.0_sp, 0.0_sp, 0.0_sp, 0.0_sp, & |
|---|
| 423 | 0.0_sp, 0.0_sp, 0.0_wp, 0.0_wp, 0.0_wp, & |
|---|
| 424 | 0, .FALSE., 0.0_wp, 0.0_wp, 0.0_wp, & |
|---|
| 425 | 0.0_sp, 0.0_sp, 0.0_sp, 0.0_sp, 0.0_sp, & |
|---|
| 426 | 0.0_sp, 0, 0, 0, -1) |
|---|
| 427 | #else |
|---|
| 428 | zero_particle = particle_type( 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, & |
|---|
| 429 | 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, & |
|---|
| 430 | 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, & |
|---|
| 431 | 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0, 0, 0, & |
|---|
| 432 | 0, .FALSE., -1) |
|---|
| 433 | #endif |
|---|
| 434 | particle_groups = particle_groups_type( 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp ) |
|---|
| 435 | |
|---|
| 436 | ! |
|---|
| 437 | !-- Set the default particle size used for dvrp plots |
|---|
| 438 | IF ( dvrp_psize == 9999999.9_wp ) dvrp_psize = 0.2_wp * dx |
|---|
| 439 | |
|---|
| 440 | ! |
|---|
| 441 | !-- Set values for the density ratio and radius for all particle |
|---|
| 442 | !-- groups, if necessary |
|---|
| 443 | IF ( density_ratio(1) == 9999999.9_wp ) density_ratio(1) = 0.0_wp |
|---|
| 444 | IF ( radius(1) == 9999999.9_wp ) radius(1) = 0.0_wp |
|---|
| 445 | DO i = 2, number_of_particle_groups |
|---|
| 446 | IF ( density_ratio(i) == 9999999.9_wp ) THEN |
|---|
| 447 | density_ratio(i) = density_ratio(i-1) |
|---|
| 448 | ENDIF |
|---|
| 449 | IF ( radius(i) == 9999999.9_wp ) radius(i) = radius(i-1) |
|---|
| 450 | ENDDO |
|---|
| 451 | |
|---|
| 452 | DO i = 1, number_of_particle_groups |
|---|
| 453 | IF ( density_ratio(i) /= 0.0_wp .AND. radius(i) == 0 ) THEN |
|---|
| 454 | WRITE( message_string, * ) 'particle group #', i, 'has a', & |
|---|
| 455 | 'density ratio /= 0 but radius = 0' |
|---|
| 456 | CALL message( 'lpm_init', 'PA0215', 1, 2, 0, 6, 0 ) |
|---|
| 457 | ENDIF |
|---|
| 458 | particle_groups(i)%density_ratio = density_ratio(i) |
|---|
| 459 | particle_groups(i)%radius = radius(i) |
|---|
| 460 | ENDDO |
|---|
| 461 | |
|---|
| 462 | CALL lpm_create_particle (PHASE_INIT) |
|---|
| 463 | ! |
|---|
| 464 | !-- Set a seed value for the random number generator to be exclusively |
|---|
| 465 | !-- used for the particle code. The generated random numbers should be |
|---|
| 466 | !-- different on the different PEs. |
|---|
| 467 | iran_part = iran_part + myid |
|---|
| 468 | |
|---|
| 469 | ! |
|---|
| 470 | !-- User modification of initial particles |
|---|
| 471 | CALL user_lpm_init |
|---|
| 472 | |
|---|
| 473 | ! |
|---|
| 474 | !-- Open file for statistical informations about particle conditions |
|---|
| 475 | IF ( write_particle_statistics ) THEN |
|---|
| 476 | CALL check_open( 80 ) |
|---|
| 477 | WRITE ( 80, 8000 ) current_timestep_number, simulated_time, & |
|---|
| 478 | number_of_particles, & |
|---|
| 479 | maximum_number_of_particles |
|---|
| 480 | CALL close_file( 80 ) |
|---|
| 481 | ENDIF |
|---|
| 482 | |
|---|
| 483 | ! |
|---|
| 484 | !-- Check if particles are really uniform in color and radius (dvrp_size) |
|---|
| 485 | !-- (uniform_particles is preset TRUE) |
|---|
| 486 | IF ( uniform_particles ) THEN |
|---|
| 487 | DO ip = nxl, nxr |
|---|
| 488 | DO jp = nys, nyn |
|---|
| 489 | DO kp = nzb+1, nzt |
|---|
| 490 | |
|---|
| 491 | n = prt_count(kp,jp,ip) |
|---|
| 492 | IF ( MINVAL( grid_particles(kp,jp,ip)%particles(1:n)%dvrp_psize ) == & |
|---|
| 493 | MAXVAL( grid_particles(kp,jp,ip)%particles(1:n)%dvrp_psize ) .AND. & |
|---|
| 494 | MINVAL( grid_particles(kp,jp,ip)%particles(1:n)%class ) == & |
|---|
| 495 | MAXVAL( grid_particles(kp,jp,ip)%particles(1:n)%class ) ) THEN |
|---|
| 496 | uniform_particles_l = .TRUE. |
|---|
| 497 | ELSE |
|---|
| 498 | uniform_particles_l = .FALSE. |
|---|
| 499 | ENDIF |
|---|
| 500 | |
|---|
| 501 | ENDDO |
|---|
| 502 | ENDDO |
|---|
| 503 | ENDDO |
|---|
| 504 | |
|---|
| 505 | #if defined( __parallel ) |
|---|
| 506 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
|---|
| 507 | CALL MPI_ALLREDUCE( uniform_particles_l, uniform_particles, 1, & |
|---|
| 508 | MPI_LOGICAL, MPI_LAND, comm2d, ierr ) |
|---|
| 509 | #else |
|---|
| 510 | uniform_particles = uniform_particles_l |
|---|
| 511 | #endif |
|---|
| 512 | |
|---|
| 513 | ENDIF |
|---|
| 514 | |
|---|
| 515 | ! |
|---|
| 516 | !-- Particles will probably become none-uniform, if their size and color |
|---|
| 517 | !-- will be determined by flow variables |
|---|
| 518 | IF ( particle_color /= 'none' .OR. particle_dvrpsize /= 'none' ) THEN |
|---|
| 519 | uniform_particles = .FALSE. |
|---|
| 520 | ENDIF |
|---|
| 521 | |
|---|
| 522 | ! !kk Not implemented aft individual particle array fort every gridcell |
|---|
| 523 | ! ! |
|---|
| 524 | ! !-- Set the beginning of the particle tails and their age |
|---|
| 525 | ! IF ( use_particle_tails ) THEN |
|---|
| 526 | ! ! |
|---|
| 527 | ! !-- Choose the maximum number of tails with respect to the maximum number |
|---|
| 528 | ! !-- of particles and skip_particles_for_tail |
|---|
| 529 | ! maximum_number_of_tails = maximum_number_of_particles / & |
|---|
| 530 | ! skip_particles_for_tail |
|---|
| 531 | ! |
|---|
| 532 | ! ! |
|---|
| 533 | ! !-- Create a minimum number of tails in case that there is no tail |
|---|
| 534 | ! !-- initially (otherwise, index errors will occur when adressing the |
|---|
| 535 | ! !-- arrays below) |
|---|
| 536 | ! IF ( maximum_number_of_tails == 0 ) maximum_number_of_tails = 10 |
|---|
| 537 | ! |
|---|
| 538 | ! ALLOCATE( particle_tail_coordinates(maximum_number_of_tailpoints,5, & |
|---|
| 539 | ! maximum_number_of_tails), & |
|---|
| 540 | ! new_tail_id(maximum_number_of_tails), & |
|---|
| 541 | ! tail_mask(maximum_number_of_tails) ) |
|---|
| 542 | ! |
|---|
| 543 | ! particle_tail_coordinates = 0.0_wp |
|---|
| 544 | ! minimum_tailpoint_distance = minimum_tailpoint_distance**2 |
|---|
| 545 | ! number_of_initial_tails = number_of_tails |
|---|
| 546 | ! |
|---|
| 547 | ! nn = 0 |
|---|
| 548 | ! DO n = 1, number_of_particles |
|---|
| 549 | ! ! |
|---|
| 550 | ! !-- Only for those particles marked above with a provisional tail_id |
|---|
| 551 | ! !-- tails will be created. Particles now get their final tail_id. |
|---|
| 552 | ! IF ( particles(n)%tail_id /= 0 ) THEN |
|---|
| 553 | ! |
|---|
| 554 | ! nn = nn + 1 |
|---|
| 555 | ! particles(n)%tail_id = nn |
|---|
| 556 | ! |
|---|
| 557 | ! particle_tail_coordinates(1,1,nn) = particles(n)%x |
|---|
| 558 | ! particle_tail_coordinates(1,2,nn) = particles(n)%y |
|---|
| 559 | ! particle_tail_coordinates(1,3,nn) = particles(n)%z |
|---|
| 560 | ! particle_tail_coordinates(1,4,nn) = particles(n)%class |
|---|
| 561 | ! particles(n)%tailpoints = 1 |
|---|
| 562 | ! IF ( minimum_tailpoint_distance /= 0.0_wp ) THEN |
|---|
| 563 | ! particle_tail_coordinates(2,1,nn) = particles(n)%x |
|---|
| 564 | ! particle_tail_coordinates(2,2,nn) = particles(n)%y |
|---|
| 565 | ! particle_tail_coordinates(2,3,nn) = particles(n)%z |
|---|
| 566 | ! particle_tail_coordinates(2,4,nn) = particles(n)%class |
|---|
| 567 | ! particle_tail_coordinates(1:2,5,nn) = 0.0_wp |
|---|
| 568 | ! particles(n)%tailpoints = 2 |
|---|
| 569 | ! ENDIF |
|---|
| 570 | ! |
|---|
| 571 | ! ENDIF |
|---|
| 572 | ! ENDDO |
|---|
| 573 | ! ENDIF |
|---|
| 574 | ! |
|---|
| 575 | ! ! |
|---|
| 576 | ! !-- Plot initial positions of particles (only if particle advection is |
|---|
| 577 | ! !-- switched on from the beginning of the simulation (t=0)) |
|---|
| 578 | ! IF ( particle_advection_start == 0.0_wp ) CALL data_output_dvrp |
|---|
| 579 | |
|---|
| 580 | ENDIF |
|---|
| 581 | |
|---|
| 582 | ! |
|---|
| 583 | !-- To avoid programm abort, assign particles array to the local version of |
|---|
| 584 | !-- first grid cell |
|---|
| 585 | number_of_particles = prt_count(nzb+1,nys,nxl) |
|---|
| 586 | particles => grid_particles(nzb+1,nys,nxl)%particles(1:number_of_particles) |
|---|
| 587 | |
|---|
| 588 | ! |
|---|
| 589 | !-- Formats |
|---|
| 590 | 8000 FORMAT (I6,1X,F7.2,4X,I10,71X,I10) |
|---|
| 591 | |
|---|
| 592 | END SUBROUTINE lpm_init |
|---|
| 593 | |
|---|
| 594 | SUBROUTINE lpm_create_particle (phase) |
|---|
| 595 | |
|---|
| 596 | USE lpm_exchange_horiz_mod, & |
|---|
| 597 | ONLY: lpm_exchange_horiz, lpm_move_particle, realloc_particles_array |
|---|
| 598 | |
|---|
| 599 | USE lpm_pack_arrays_mod, & |
|---|
| 600 | ONLY: lpm_pack_all_arrays |
|---|
| 601 | |
|---|
| 602 | IMPLICIT NONE |
|---|
| 603 | |
|---|
| 604 | INTEGER(iwp) :: alloc_size !: |
|---|
| 605 | INTEGER(iwp) :: i !: |
|---|
| 606 | INTEGER(iwp) :: ip !: |
|---|
| 607 | INTEGER(iwp) :: j !: |
|---|
| 608 | INTEGER(iwp) :: jp !: |
|---|
| 609 | INTEGER(iwp) :: kp !: |
|---|
| 610 | INTEGER(iwp) :: loop_stride !: |
|---|
| 611 | INTEGER(iwp) :: n !: |
|---|
| 612 | INTEGER(iwp) :: new_size !: |
|---|
| 613 | INTEGER(iwp) :: nn !: |
|---|
| 614 | |
|---|
| 615 | INTEGER(iwp), INTENT(IN) :: phase !: |
|---|
| 616 | |
|---|
| 617 | INTEGER(iwp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: local_count !: |
|---|
| 618 | INTEGER(iwp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: local_start !: |
|---|
| 619 | |
|---|
| 620 | LOGICAL :: first_stride !: |
|---|
| 621 | |
|---|
| 622 | REAL(wp) :: pos_x !: |
|---|
| 623 | REAL(wp) :: pos_y !: |
|---|
| 624 | REAL(wp) :: pos_z !: |
|---|
| 625 | |
|---|
| 626 | TYPE(particle_type),TARGET :: tmp_particle !: |
|---|
| 627 | |
|---|
| 628 | ! |
|---|
| 629 | !-- Calculate particle positions and store particle attributes, if |
|---|
| 630 | !-- particle is situated on this PE |
|---|
| 631 | DO loop_stride = 1, 2 |
|---|
| 632 | first_stride = (loop_stride == 1) |
|---|
| 633 | IF ( first_stride ) THEN |
|---|
| 634 | local_count = 0 ! count number of particles |
|---|
| 635 | ELSE |
|---|
| 636 | local_count = prt_count ! Start address of new particles |
|---|
| 637 | ENDIF |
|---|
| 638 | |
|---|
| 639 | n = 0 |
|---|
| 640 | DO i = 1, number_of_particle_groups |
|---|
| 641 | |
|---|
| 642 | pos_z = psb(i) |
|---|
| 643 | |
|---|
| 644 | DO WHILE ( pos_z <= pst(i) ) |
|---|
| 645 | |
|---|
| 646 | pos_y = pss(i) |
|---|
| 647 | |
|---|
| 648 | DO WHILE ( pos_y <= psn(i) ) |
|---|
| 649 | |
|---|
| 650 | IF ( pos_y >= ( nys - 0.5_wp ) * dy .AND. & |
|---|
| 651 | pos_y < ( nyn + 0.5_wp ) * dy ) THEN |
|---|
| 652 | |
|---|
| 653 | pos_x = psl(i) |
|---|
| 654 | |
|---|
| 655 | xloop: DO WHILE ( pos_x <= psr(i) ) |
|---|
| 656 | |
|---|
| 657 | IF ( pos_x >= ( nxl - 0.5_wp ) * dx .AND. & |
|---|
| 658 | pos_x < ( nxr + 0.5_wp ) * dx ) THEN |
|---|
| 659 | |
|---|
| 660 | DO j = 1, particles_per_point |
|---|
| 661 | |
|---|
| 662 | n = n + 1 |
|---|
| 663 | #if defined( __twocachelines ) |
|---|
| 664 | tmp_particle%x = pos_x |
|---|
| 665 | tmp_particle%y = pos_y |
|---|
| 666 | tmp_particle%z = pos_z |
|---|
| 667 | tmp_particle%age = 0.0_sp |
|---|
| 668 | tmp_particle%age_m = 0.0_sp |
|---|
| 669 | tmp_particle%dt_sum = 0.0_wp |
|---|
| 670 | tmp_particle%dvrp_psize = dvrp_psize |
|---|
| 671 | tmp_particle%e_m = 0.0_sp |
|---|
| 672 | IF ( curvature_solution_effects ) THEN |
|---|
| 673 | ! |
|---|
| 674 | !-- Initial values (internal timesteps, derivative) |
|---|
| 675 | !-- for Rosenbrock method |
|---|
| 676 | tmp_particle%rvar1 = 1.0E-12_wp |
|---|
| 677 | tmp_particle%rvar2 = 1.0E-3_wp |
|---|
| 678 | tmp_particle%rvar3 = -9999999.9_wp |
|---|
| 679 | ELSE |
|---|
| 680 | ! |
|---|
| 681 | !-- Initial values for SGS velocities |
|---|
| 682 | tmp_particle%rvar1 = 0.0_wp |
|---|
| 683 | tmp_particle%rvar2 = 0.0_wp |
|---|
| 684 | tmp_particle%rvar3 = 0.0_wp |
|---|
| 685 | ENDIF |
|---|
| 686 | tmp_particle%speed_x = 0.0_sp |
|---|
| 687 | tmp_particle%speed_y = 0.0_sp |
|---|
| 688 | tmp_particle%speed_z = 0.0_sp |
|---|
| 689 | tmp_particle%origin_x = pos_x |
|---|
| 690 | tmp_particle%origin_y = pos_y |
|---|
| 691 | tmp_particle%origin_z = pos_z |
|---|
| 692 | tmp_particle%radius = particle_groups(i)%radius |
|---|
| 693 | tmp_particle%weight_factor = initial_weighting_factor |
|---|
| 694 | tmp_particle%class = 1 |
|---|
| 695 | tmp_particle%group = i |
|---|
| 696 | tmp_particle%tailpoints = 0 |
|---|
| 697 | tmp_particle%particle_mask = .TRUE. |
|---|
| 698 | #else |
|---|
| 699 | tmp_particle%x = pos_x |
|---|
| 700 | tmp_particle%y = pos_y |
|---|
| 701 | tmp_particle%z = pos_z |
|---|
| 702 | tmp_particle%age = 0.0_wp |
|---|
| 703 | tmp_particle%age_m = 0.0_wp |
|---|
| 704 | tmp_particle%dt_sum = 0.0_wp |
|---|
| 705 | tmp_particle%dvrp_psize = dvrp_psize |
|---|
| 706 | tmp_particle%e_m = 0.0_wp |
|---|
| 707 | IF ( curvature_solution_effects ) THEN |
|---|
| 708 | ! |
|---|
| 709 | !-- Initial values (internal timesteps, derivative) |
|---|
| 710 | !-- for Rosenbrock method |
|---|
| 711 | tmp_particle%rvar1 = 1.0E-12_wp |
|---|
| 712 | tmp_particle%rvar2 = 1.0E-3_wp |
|---|
| 713 | tmp_particle%rvar3 = -9999999.9_wp |
|---|
| 714 | ELSE |
|---|
| 715 | ! |
|---|
| 716 | !-- Initial values for SGS velocities |
|---|
| 717 | tmp_particle%rvar1 = 0.0_wp |
|---|
| 718 | tmp_particle%rvar2 = 0.0_wp |
|---|
| 719 | tmp_particle%rvar3 = 0.0_wp |
|---|
| 720 | ENDIF |
|---|
| 721 | tmp_particle%speed_x = 0.0_wp |
|---|
| 722 | tmp_particle%speed_y = 0.0_wp |
|---|
| 723 | tmp_particle%speed_z = 0.0_wp |
|---|
| 724 | tmp_particle%origin_x = pos_x |
|---|
| 725 | tmp_particle%origin_y = pos_y |
|---|
| 726 | tmp_particle%origin_z = pos_z |
|---|
| 727 | tmp_particle%radius = particle_groups(i)%radius |
|---|
| 728 | tmp_particle%weight_factor = initial_weighting_factor |
|---|
| 729 | tmp_particle%class = 1 |
|---|
| 730 | tmp_particle%group = i |
|---|
| 731 | tmp_particle%tailpoints = 0 |
|---|
| 732 | tmp_particle%particle_mask = .TRUE. |
|---|
| 733 | #endif |
|---|
| 734 | IF ( use_particle_tails .AND. & |
|---|
| 735 | MOD( n, skip_particles_for_tail ) == 0 ) THEN |
|---|
| 736 | number_of_tails = number_of_tails + 1 |
|---|
| 737 | ! |
|---|
| 738 | !-- This is a temporary provisional setting (see |
|---|
| 739 | !-- further below!) |
|---|
| 740 | tmp_particle%tail_id = number_of_tails |
|---|
| 741 | ELSE |
|---|
| 742 | tmp_particle%tail_id = 0 |
|---|
| 743 | ENDIF |
|---|
| 744 | ! |
|---|
| 745 | !-- Determine the grid indices of the particle position |
|---|
| 746 | ip = ( tmp_particle%x + 0.5_wp * dx ) * ddx |
|---|
| 747 | jp = ( tmp_particle%y + 0.5_wp * dy ) * ddy |
|---|
| 748 | kp = tmp_particle%z / dz + 1 + offset_ocean_nzt_m1 |
|---|
| 749 | |
|---|
| 750 | IF ( seed_follows_topography ) THEN |
|---|
| 751 | ! |
|---|
| 752 | !-- Particle height is given relative to topography |
|---|
| 753 | kp = kp + nzb_w_inner(jp,ip) |
|---|
| 754 | tmp_particle%z = tmp_particle%z + zw(kp) |
|---|
| 755 | IF ( kp > nzt ) THEN |
|---|
| 756 | pos_x = pos_x + pdx(i) |
|---|
| 757 | CYCLE xloop |
|---|
| 758 | ENDIF |
|---|
| 759 | ENDIF |
|---|
| 760 | |
|---|
| 761 | local_count(kp,jp,ip) = local_count(kp,jp,ip) + 1 |
|---|
| 762 | IF ( .NOT. first_stride ) THEN |
|---|
| 763 | IF ( ip < nxl .OR. jp < nys .OR. kp < nzb+1 ) THEN |
|---|
| 764 | write(6,*) 'xl ',ip,jp,kp,nxl,nys,nzb+1 |
|---|
| 765 | ENDIF |
|---|
| 766 | IF ( ip > nxr .OR. jp > nyn .OR. kp > nzt ) THEN |
|---|
| 767 | write(6,*) 'xu ',ip,jp,kp,nxr,nyn,nzt |
|---|
| 768 | ENDIF |
|---|
| 769 | grid_particles(kp,jp,ip)%particles(local_count(kp,jp,ip)) = tmp_particle |
|---|
| 770 | ENDIF |
|---|
| 771 | ENDDO |
|---|
| 772 | |
|---|
| 773 | ENDIF |
|---|
| 774 | |
|---|
| 775 | pos_x = pos_x + pdx(i) |
|---|
| 776 | |
|---|
| 777 | ENDDO xloop |
|---|
| 778 | |
|---|
| 779 | ENDIF |
|---|
| 780 | |
|---|
| 781 | pos_y = pos_y + pdy(i) |
|---|
| 782 | |
|---|
| 783 | ENDDO |
|---|
| 784 | |
|---|
| 785 | pos_z = pos_z + pdz(i) |
|---|
| 786 | |
|---|
| 787 | ENDDO |
|---|
| 788 | |
|---|
| 789 | ENDDO |
|---|
| 790 | |
|---|
| 791 | IF ( first_stride ) THEN |
|---|
| 792 | DO ip = nxl, nxr |
|---|
| 793 | DO jp = nys, nyn |
|---|
| 794 | DO kp = nzb+1, nzt |
|---|
| 795 | IF ( phase == PHASE_INIT ) THEN |
|---|
| 796 | IF ( local_count(kp,jp,ip) > 0 ) THEN |
|---|
| 797 | alloc_size = MAX( INT( local_count(kp,jp,ip) * & |
|---|
| 798 | ( 1.0_wp + alloc_factor / 100.0_wp ) ), & |
|---|
| 799 | min_nr_particle ) |
|---|
| 800 | ELSE |
|---|
| 801 | alloc_size = min_nr_particle |
|---|
| 802 | ENDIF |
|---|
| 803 | ALLOCATE(grid_particles(kp,jp,ip)%particles(1:alloc_size)) |
|---|
| 804 | DO n = 1, alloc_size |
|---|
| 805 | grid_particles(kp,jp,ip)%particles(n) = zero_particle |
|---|
| 806 | ENDDO |
|---|
| 807 | ELSEIF ( phase == PHASE_RELEASE ) THEN |
|---|
| 808 | IF ( local_count(kp,jp,ip) > 0 ) THEN |
|---|
| 809 | new_size = local_count(kp,jp,ip) + prt_count(kp,jp,ip) |
|---|
| 810 | alloc_size = MAX( INT( new_size * ( 1.0_wp + & |
|---|
| 811 | alloc_factor / 100.0_wp ) ), min_nr_particle ) |
|---|
| 812 | IF( alloc_size > SIZE( grid_particles(kp,jp,ip)%particles) ) THEN |
|---|
| 813 | CALL realloc_particles_array(ip,jp,kp,alloc_size) |
|---|
| 814 | ENDIF |
|---|
| 815 | ENDIF |
|---|
| 816 | ENDIF |
|---|
| 817 | ENDDO |
|---|
| 818 | ENDDO |
|---|
| 819 | ENDDO |
|---|
| 820 | ENDIF |
|---|
| 821 | ENDDO |
|---|
| 822 | |
|---|
| 823 | local_start = prt_count+1 |
|---|
| 824 | prt_count = local_count |
|---|
| 825 | ! |
|---|
| 826 | !-- Add random fluctuation to particle positions |
|---|
| 827 | IF ( random_start_position ) THEN |
|---|
| 828 | DO ip = nxl, nxr |
|---|
| 829 | DO jp = nys, nyn |
|---|
| 830 | DO kp = nzb+1, nzt |
|---|
| 831 | number_of_particles = prt_count(kp,jp,ip) |
|---|
| 832 | IF ( number_of_particles <= 0 ) CYCLE |
|---|
| 833 | particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles) |
|---|
| 834 | |
|---|
| 835 | DO n = local_start(kp,jp,ip), number_of_particles !Move only new particles |
|---|
| 836 | IF ( psl(particles(n)%group) /= psr(particles(n)%group) ) THEN |
|---|
| 837 | particles(n)%x = particles(n)%x + & |
|---|
| 838 | ( random_function( iran_part ) - 0.5_wp ) * & |
|---|
| 839 | pdx(particles(n)%group) |
|---|
| 840 | ENDIF |
|---|
| 841 | IF ( pss(particles(n)%group) /= psn(particles(n)%group) ) THEN |
|---|
| 842 | particles(n)%y = particles(n)%y + & |
|---|
| 843 | ( random_function( iran_part ) - 0.5_wp ) * & |
|---|
| 844 | pdy(particles(n)%group) |
|---|
| 845 | ENDIF |
|---|
| 846 | IF ( psb(particles(n)%group) /= pst(particles(n)%group) ) THEN |
|---|
| 847 | particles(n)%z = particles(n)%z + & |
|---|
| 848 | ( random_function( iran_part ) - 0.5_wp ) * & |
|---|
| 849 | pdz(particles(n)%group) |
|---|
| 850 | ENDIF |
|---|
| 851 | ENDDO |
|---|
| 852 | ! |
|---|
| 853 | !-- Identify particles located outside the model domain |
|---|
| 854 | CALL lpm_boundary_conds( 'bottom/top' ) |
|---|
| 855 | ENDDO |
|---|
| 856 | ENDDO |
|---|
| 857 | ENDDO |
|---|
| 858 | ! |
|---|
| 859 | !-- Exchange particles between grid cells and processors |
|---|
| 860 | CALL lpm_move_particle |
|---|
| 861 | CALL lpm_exchange_horiz |
|---|
| 862 | |
|---|
| 863 | ENDIF |
|---|
| 864 | ! |
|---|
| 865 | !-- In case of random_start_position, delete particles identified by |
|---|
| 866 | !-- lpm_exchange_horiz and lpm_boundary_conds. Then sort particles into blocks, |
|---|
| 867 | !-- which is needed for a fast interpolation of the LES fields on the particle |
|---|
| 868 | !-- position. |
|---|
| 869 | CALL lpm_pack_all_arrays |
|---|
| 870 | |
|---|
| 871 | ! |
|---|
| 872 | !-- Determine maximum number of particles (i.e., all possible particles that |
|---|
| 873 | !-- have been allocated) and the current number of particles |
|---|
| 874 | DO ip = nxl, nxr |
|---|
| 875 | DO jp = nys, nyn |
|---|
| 876 | DO kp = nzb+1, nzt |
|---|
| 877 | maximum_number_of_particles = maximum_number_of_particles & |
|---|
| 878 | + SIZE(grid_particles(kp,jp,ip)%particles) |
|---|
| 879 | number_of_particles = number_of_particles & |
|---|
| 880 | + prt_count(kp,jp,ip) |
|---|
| 881 | ENDDO |
|---|
| 882 | ENDDO |
|---|
| 883 | ENDDO |
|---|
| 884 | ! |
|---|
| 885 | !-- Calculate the number of particles and tails of the total domain |
|---|
| 886 | #if defined( __parallel ) |
|---|
| 887 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
|---|
| 888 | CALL MPI_ALLREDUCE( number_of_particles, total_number_of_particles, 1, & |
|---|
| 889 | MPI_INTEGER, MPI_SUM, comm2d, ierr ) |
|---|
| 890 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
|---|
| 891 | CALL MPI_ALLREDUCE( number_of_tails, total_number_of_tails, 1, & |
|---|
| 892 | MPI_INTEGER, MPI_SUM, comm2d, ierr ) |
|---|
| 893 | #else |
|---|
| 894 | total_number_of_particles = number_of_particles |
|---|
| 895 | total_number_of_tails = number_of_tails |
|---|
| 896 | #endif |
|---|
| 897 | |
|---|
| 898 | RETURN |
|---|
| 899 | |
|---|
| 900 | END SUBROUTINE lpm_create_particle |
|---|
| 901 | |
|---|
| 902 | END MODULE lpm_init_mod |
|---|
