[849] | 1 | SUBROUTINE lpm_init |
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[1] | 2 | |
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[1036] | 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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[1310] | 17 | ! Copyright 1997-2014 Leibniz Universitaet Hannover |
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[1036] | 18 | !--------------------------------------------------------------------------------! |
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| 19 | ! |
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[254] | 20 | ! Current revisions: |
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[1] | 21 | ! ----------------- |
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[1314] | 22 | ! Vertical logarithmic interpolation of horizontal particle speed for particles |
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| 23 | ! between roughness height and first vertical grid level. |
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[850] | 24 | ! |
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| 25 | ! Former revisions: |
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| 26 | ! ----------------- |
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| 27 | ! $Id: lpm_init.f90 1314 2014-03-14 18:25:17Z suehring $ |
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| 28 | ! |
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[1093] | 29 | ! 1092 2013-02-02 11:24:22Z raasch |
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| 30 | ! unused variables removed |
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| 31 | ! |
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[1037] | 32 | ! 1036 2012-10-22 13:43:42Z raasch |
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| 33 | ! code put under GPL (PALM 3.9) |
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| 34 | ! |
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[850] | 35 | ! 849 2012-03-15 10:35:09Z raasch |
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[849] | 36 | ! routine renamed: init_particles -> lpm_init |
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| 37 | ! de_dx, de_dy, de_dz are allocated here (instead of automatic arrays in |
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| 38 | ! advec_particles), |
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| 39 | ! sort_particles renamed lpm_sort_arrays, user_init_particles renamed lpm_init |
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[392] | 40 | ! |
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[829] | 41 | ! 828 2012-02-21 12:00:36Z raasch |
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| 42 | ! call of init_kernels, particle feature color renamed class |
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| 43 | ! |
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[826] | 44 | ! 824 2012-02-17 09:09:57Z raasch |
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| 45 | ! particle attributes speed_x|y|z_sgs renamed rvar1|2|3, |
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| 46 | ! array particles implemented as pointer |
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| 47 | ! |
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[668] | 48 | ! 667 2010-12-23 12:06:00Z suehring/gryschka |
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| 49 | ! nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng for allocation |
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| 50 | ! of arrays. |
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| 51 | ! |
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[623] | 52 | ! 622 2010-12-10 08:08:13Z raasch |
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| 53 | ! optional barriers included in order to speed up collective operations |
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| 54 | ! |
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[392] | 55 | ! 336 2009-06-10 11:19:35Z raasch |
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[276] | 56 | ! Maximum number of tails is calculated from maximum number of particles and |
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| 57 | ! skip_particles_for_tail, |
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| 58 | ! output of messages replaced by message handling routine |
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[229] | 59 | ! Bugfix: arrays for tails are allocated with a minimum size of 10 tails if |
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| 60 | ! there is no tail initially |
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[1] | 61 | ! |
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[198] | 62 | ! 150 2008-02-29 08:19:58Z raasch |
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| 63 | ! Setting offset_ocean_* needed for calculating vertical indices within ocean |
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| 64 | ! runs |
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| 65 | ! |
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[139] | 66 | ! 117 2007-10-11 03:27:59Z raasch |
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| 67 | ! Sorting of particles only in case of cloud droplets |
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| 68 | ! |
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[110] | 69 | ! 106 2007-08-16 14:30:26Z raasch |
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| 70 | ! variable iran replaced by iran_part |
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| 71 | ! |
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[83] | 72 | ! 82 2007-04-16 15:40:52Z raasch |
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| 73 | ! Preprocessor directives for old systems removed |
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| 74 | ! |
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[77] | 75 | ! 70 2007-03-18 23:46:30Z raasch |
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| 76 | ! displacements for mpi_particle_type changed, age_m initialized, |
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| 77 | ! particles-package is now part of the default code |
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| 78 | ! |
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[39] | 79 | ! 16 2007-02-15 13:16:47Z raasch |
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| 80 | ! Bugfix: MPI_REAL in MPI_ALLREDUCE replaced by MPI_INTEGER |
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| 81 | ! |
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| 82 | ! r4 | raasch | 2007-02-13 12:33:16 +0100 (Tue, 13 Feb 2007) |
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[3] | 83 | ! RCS Log replace by Id keyword, revision history cleaned up |
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| 84 | ! |
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[1] | 85 | ! Revision 1.24 2007/02/11 13:00:17 raasch |
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| 86 | ! Bugfix: allocation of tail_mask and new_tail_id in case of restart-runs |
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| 87 | ! Bugfix: __ was missing in a cpp-directive |
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| 88 | ! |
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| 89 | ! Revision 1.1 1999/11/25 16:22:38 raasch |
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| 90 | ! Initial revision |
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| 91 | ! |
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| 92 | ! |
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| 93 | ! Description: |
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| 94 | ! ------------ |
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| 95 | ! This routine initializes a set of particles and their attributes (position, |
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[849] | 96 | ! radius, ..) which are used by the Lagrangian particle model (see lpm). |
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[1] | 97 | !------------------------------------------------------------------------------! |
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| 98 | |
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| 99 | USE arrays_3d |
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[824] | 100 | USE cloud_parameters |
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[1] | 101 | USE control_parameters |
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[336] | 102 | USE dvrp_variables |
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[1] | 103 | USE grid_variables |
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| 104 | USE indices |
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[828] | 105 | USE lpm_collision_kernels_mod |
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[1] | 106 | USE particle_attributes |
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| 107 | USE pegrid |
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| 108 | USE random_function_mod |
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| 109 | |
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| 110 | |
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| 111 | IMPLICIT NONE |
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| 112 | |
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[1314] | 113 | INTEGER :: i, j, k, n, nn |
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[1] | 114 | #if defined( __parallel ) |
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| 115 | INTEGER, DIMENSION(3) :: blocklengths, displacements, types |
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| 116 | #endif |
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| 117 | LOGICAL :: uniform_particles_l |
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[1314] | 118 | REAL :: height_int, height_p, pos_x, pos_y, pos_z, z_p, & |
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| 119 | z0_av_local = 0.0 |
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[1] | 120 | |
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| 121 | |
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| 122 | #if defined( __parallel ) |
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| 123 | ! |
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| 124 | !-- Define MPI derived datatype for FORTRAN datatype particle_type (see module |
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[82] | 125 | !-- particle_attributes). Integer length is 4 byte, Real is 8 byte |
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| 126 | blocklengths(1) = 19; blocklengths(2) = 4; blocklengths(3) = 1 |
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| 127 | displacements(1) = 0; displacements(2) = 152; displacements(3) = 168 |
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| 128 | |
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[1] | 129 | types(1) = MPI_REAL |
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| 130 | types(2) = MPI_INTEGER |
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| 131 | types(3) = MPI_UB |
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| 132 | CALL MPI_TYPE_STRUCT( 3, blocklengths, displacements, types, & |
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| 133 | mpi_particle_type, ierr ) |
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| 134 | CALL MPI_TYPE_COMMIT( mpi_particle_type, ierr ) |
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| 135 | #endif |
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| 136 | |
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| 137 | ! |
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[150] | 138 | !-- In case of oceans runs, the vertical index calculations need an offset, |
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| 139 | !-- because otherwise the k indices will become negative |
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| 140 | IF ( ocean ) THEN |
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| 141 | offset_ocean_nzt = nzt |
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| 142 | offset_ocean_nzt_m1 = nzt - 1 |
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| 143 | ENDIF |
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| 144 | |
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| 145 | |
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| 146 | ! |
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[1] | 147 | !-- Check the number of particle groups. |
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| 148 | IF ( number_of_particle_groups > max_number_of_particle_groups ) THEN |
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[274] | 149 | WRITE( message_string, * ) 'max_number_of_particle_groups =', & |
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| 150 | max_number_of_particle_groups , & |
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[254] | 151 | '&number_of_particle_groups reset to ', & |
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| 152 | max_number_of_particle_groups |
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[849] | 153 | CALL message( 'lpm_init', 'PA0213', 0, 1, 0, 6, 0 ) |
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[1] | 154 | number_of_particle_groups = max_number_of_particle_groups |
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| 155 | ENDIF |
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| 156 | |
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| 157 | ! |
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| 158 | !-- Set default start positions, if necessary |
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| 159 | IF ( psl(1) == 9999999.9 ) psl(1) = -0.5 * dx |
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| 160 | IF ( psr(1) == 9999999.9 ) psr(1) = ( nx + 0.5 ) * dx |
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| 161 | IF ( pss(1) == 9999999.9 ) pss(1) = -0.5 * dy |
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| 162 | IF ( psn(1) == 9999999.9 ) psn(1) = ( ny + 0.5 ) * dy |
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| 163 | IF ( psb(1) == 9999999.9 ) psb(1) = zu(nz/2) |
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| 164 | IF ( pst(1) == 9999999.9 ) pst(1) = psb(1) |
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| 165 | |
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| 166 | IF ( pdx(1) == 9999999.9 .OR. pdx(1) == 0.0 ) pdx(1) = dx |
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| 167 | IF ( pdy(1) == 9999999.9 .OR. pdy(1) == 0.0 ) pdy(1) = dy |
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| 168 | IF ( pdz(1) == 9999999.9 .OR. pdz(1) == 0.0 ) pdz(1) = zu(2) - zu(1) |
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| 169 | |
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| 170 | DO j = 2, number_of_particle_groups |
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| 171 | IF ( psl(j) == 9999999.9 ) psl(j) = psl(j-1) |
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| 172 | IF ( psr(j) == 9999999.9 ) psr(j) = psr(j-1) |
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| 173 | IF ( pss(j) == 9999999.9 ) pss(j) = pss(j-1) |
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| 174 | IF ( psn(j) == 9999999.9 ) psn(j) = psn(j-1) |
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| 175 | IF ( psb(j) == 9999999.9 ) psb(j) = psb(j-1) |
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| 176 | IF ( pst(j) == 9999999.9 ) pst(j) = pst(j-1) |
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| 177 | IF ( pdx(j) == 9999999.9 .OR. pdx(j) == 0.0 ) pdx(j) = pdx(j-1) |
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| 178 | IF ( pdy(j) == 9999999.9 .OR. pdy(j) == 0.0 ) pdy(j) = pdy(j-1) |
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| 179 | IF ( pdz(j) == 9999999.9 .OR. pdz(j) == 0.0 ) pdz(j) = pdz(j-1) |
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| 180 | ENDDO |
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| 181 | |
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| 182 | ! |
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[849] | 183 | !-- Allocate arrays required for calculating particle SGS velocities |
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| 184 | IF ( use_sgs_for_particles ) THEN |
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| 185 | ALLOCATE( de_dx(nzb:nzt+1,nysg:nyng,nxlg:nxrg), & |
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| 186 | de_dy(nzb:nzt+1,nysg:nyng,nxlg:nxrg), & |
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| 187 | de_dz(nzb:nzt+1,nysg:nyng,nxlg:nxrg) ) |
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| 188 | ENDIF |
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| 189 | |
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| 190 | ! |
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[1314] | 191 | !-- Allocate array required for logarithmic vertical interpolation of |
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| 192 | !-- horizontal particle velocities between the surface and the first vertical |
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| 193 | !-- grid level. In order to avoid repeated CPU cost-intensive CALLS of |
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| 194 | !-- intrinsic FORTRAN procedure LOG(z/z0), LOG(z/z0) is precalculated for |
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| 195 | !-- several heights. Splitting into 20 sublayers turned out to be sufficient. |
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| 196 | !-- To obtain exact height levels of particles, linear interpolation is applied |
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| 197 | !-- (see lpm_advec.f90). |
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| 198 | IF ( prandtl_layer ) THEN |
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| 199 | |
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| 200 | ALLOCATE ( log_z_z0(0:number_of_sublayers) ) |
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| 201 | z_p = zu(nzb+1) - zw(nzb) |
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| 202 | |
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| 203 | ! |
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| 204 | !-- Calculate horizontal mean value of z0 used for logartihmic |
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| 205 | !-- interpolation. Note: this is not exact for heterogeneous z0. |
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| 206 | !-- However, sensitivity studies showed that the effect is |
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| 207 | !-- negligible. |
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| 208 | z0_av_local = SUM( z0(nys:nyn,nxl:nxr) ) |
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| 209 | z0_av_global = 0.0 |
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| 210 | |
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| 211 | CALL MPI_ALLREDUCE(z0_av_local, z0_av_global, 1, MPI_REAL, MPI_SUM, & |
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| 212 | comm2d, ierr ) |
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| 213 | |
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| 214 | z0_av_global = z0_av_global / ( ( ny + 1 ) * ( nx + 1 ) ) |
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| 215 | ! |
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| 216 | !-- Horizontal wind speed is zero below and at z0 |
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| 217 | log_z_z0(0) = 0.0 |
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| 218 | ! |
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| 219 | !-- Calculate vertical depth of the sublayers |
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| 220 | height_int = ( z_p - z0_av_global ) / REAL( number_of_sublayers ) |
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| 221 | ! |
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| 222 | !-- Precalculate LOG(z/z0) |
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| 223 | height_p = 0.0 |
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| 224 | DO k = 1, number_of_sublayers |
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| 225 | |
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| 226 | height_p = height_p + height_int |
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| 227 | log_z_z0(k) = LOG( height_p / z0_av_global ) |
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| 228 | |
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| 229 | ENDDO |
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| 230 | |
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| 231 | |
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| 232 | ENDIF |
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| 233 | |
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| 234 | ! |
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[828] | 235 | !-- Initialize collision kernels |
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| 236 | IF ( collision_kernel /= 'none' ) CALL init_kernels |
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| 237 | |
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| 238 | ! |
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[1] | 239 | !-- For the first model run of a possible job chain initialize the |
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[849] | 240 | !-- particles, otherwise read the particle data from restart file. |
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[1] | 241 | IF ( TRIM( initializing_actions ) == 'read_restart_data' & |
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| 242 | .AND. read_particles_from_restartfile ) THEN |
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| 243 | |
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[849] | 244 | CALL lpm_read_restart_file |
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[1] | 245 | |
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| 246 | ELSE |
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| 247 | |
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| 248 | ! |
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| 249 | !-- Allocate particle arrays and set attributes of the initial set of |
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| 250 | !-- particles, which can be also periodically released at later times. |
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| 251 | !-- Also allocate array for particle tail coordinates, if needed. |
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[667] | 252 | ALLOCATE( prt_count(nzb:nzt+1,nysg:nyng,nxlg:nxrg), & |
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| 253 | prt_start_index(nzb:nzt+1,nysg:nyng,nxlg:nxrg), & |
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[792] | 254 | particle_mask(maximum_number_of_particles), & |
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| 255 | part_1(maximum_number_of_particles), & |
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| 256 | part_2(maximum_number_of_particles) ) |
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[1] | 257 | |
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[792] | 258 | particles => part_1 |
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| 259 | |
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| 260 | sort_count = 0 |
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| 261 | |
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[1] | 262 | ! |
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| 263 | !-- Initialize all particles with dummy values (otherwise errors may |
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| 264 | !-- occur within restart runs). The reason for this is still not clear |
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| 265 | !-- and may be presumably caused by errors in the respective user-interface. |
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| 266 | particles = particle_type( 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, & |
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| 267 | 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, & |
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[57] | 268 | 0.0, 0, 0, 0, 0 ) |
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[1] | 269 | particle_groups = particle_groups_type( 0.0, 0.0, 0.0, 0.0 ) |
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| 270 | |
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| 271 | ! |
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| 272 | !-- Set the default particle size used for dvrp plots |
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| 273 | IF ( dvrp_psize == 9999999.9 ) dvrp_psize = 0.2 * dx |
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| 274 | |
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| 275 | ! |
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| 276 | !-- Set values for the density ratio and radius for all particle |
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| 277 | !-- groups, if necessary |
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| 278 | IF ( density_ratio(1) == 9999999.9 ) density_ratio(1) = 0.0 |
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| 279 | IF ( radius(1) == 9999999.9 ) radius(1) = 0.0 |
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| 280 | DO i = 2, number_of_particle_groups |
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| 281 | IF ( density_ratio(i) == 9999999.9 ) THEN |
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| 282 | density_ratio(i) = density_ratio(i-1) |
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| 283 | ENDIF |
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| 284 | IF ( radius(i) == 9999999.9 ) radius(i) = radius(i-1) |
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| 285 | ENDDO |
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| 286 | |
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| 287 | DO i = 1, number_of_particle_groups |
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| 288 | IF ( density_ratio(i) /= 0.0 .AND. radius(i) == 0 ) THEN |
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[254] | 289 | WRITE( message_string, * ) 'particle group #', i, 'has a', & |
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| 290 | 'density ratio /= 0 but radius = 0' |
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[849] | 291 | CALL message( 'lpm_init', 'PA0215', 1, 2, 0, 6, 0 ) |
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[1] | 292 | ENDIF |
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| 293 | particle_groups(i)%density_ratio = density_ratio(i) |
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| 294 | particle_groups(i)%radius = radius(i) |
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| 295 | ENDDO |
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| 296 | |
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| 297 | ! |
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| 298 | !-- Calculate particle positions and store particle attributes, if |
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| 299 | !-- particle is situated on this PE |
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| 300 | n = 0 |
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| 301 | |
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| 302 | DO i = 1, number_of_particle_groups |
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| 303 | |
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| 304 | pos_z = psb(i) |
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| 305 | |
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| 306 | DO WHILE ( pos_z <= pst(i) ) |
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| 307 | |
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| 308 | pos_y = pss(i) |
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| 309 | |
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| 310 | DO WHILE ( pos_y <= psn(i) ) |
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| 311 | |
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| 312 | IF ( pos_y >= ( nys - 0.5 ) * dy .AND. & |
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| 313 | pos_y < ( nyn + 0.5 ) * dy ) THEN |
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| 314 | |
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| 315 | pos_x = psl(i) |
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| 316 | |
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| 317 | DO WHILE ( pos_x <= psr(i) ) |
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| 318 | |
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| 319 | IF ( pos_x >= ( nxl - 0.5 ) * dx .AND. & |
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| 320 | pos_x < ( nxr + 0.5 ) * dx ) THEN |
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| 321 | |
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| 322 | DO j = 1, particles_per_point |
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| 323 | |
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| 324 | n = n + 1 |
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| 325 | IF ( n > maximum_number_of_particles ) THEN |
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[254] | 326 | WRITE( message_string, * ) 'number of initial', & |
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[274] | 327 | 'particles (', n, ') exceeds', & |
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| 328 | '&maximum_number_of_particles (', & |
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| 329 | maximum_number_of_particles, ') on PE ', & |
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[254] | 330 | myid |
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[849] | 331 | CALL message( 'lpm_init', 'PA0216', 2, 2, -1, 6,& |
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| 332 | 1 ) |
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[1] | 333 | ENDIF |
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| 334 | particles(n)%x = pos_x |
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| 335 | particles(n)%y = pos_y |
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| 336 | particles(n)%z = pos_z |
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| 337 | particles(n)%age = 0.0 |
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[57] | 338 | particles(n)%age_m = 0.0 |
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[1] | 339 | particles(n)%dt_sum = 0.0 |
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| 340 | particles(n)%dvrp_psize = dvrp_psize |
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| 341 | particles(n)%e_m = 0.0 |
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[824] | 342 | IF ( curvature_solution_effects ) THEN |
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| 343 | ! |
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| 344 | !-- Initial values (internal timesteps, derivative) |
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| 345 | !-- for Rosenbrock method |
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| 346 | particles(n)%rvar1 = 1.0E-12 |
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| 347 | particles(n)%rvar2 = 1.0E-3 |
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| 348 | particles(n)%rvar3 = -9999999.9 |
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| 349 | ELSE |
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| 350 | ! |
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| 351 | !-- Initial values for SGS velocities |
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| 352 | particles(n)%rvar1 = 0.0 |
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| 353 | particles(n)%rvar2 = 0.0 |
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| 354 | particles(n)%rvar3 = 0.0 |
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| 355 | ENDIF |
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[1] | 356 | particles(n)%speed_x = 0.0 |
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| 357 | particles(n)%speed_y = 0.0 |
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| 358 | particles(n)%speed_z = 0.0 |
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| 359 | particles(n)%origin_x = pos_x |
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| 360 | particles(n)%origin_y = pos_y |
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| 361 | particles(n)%origin_z = pos_z |
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| 362 | particles(n)%radius = particle_groups(i)%radius |
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| 363 | particles(n)%weight_factor =initial_weighting_factor |
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[828] | 364 | particles(n)%class = 1 |
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[1] | 365 | particles(n)%group = i |
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| 366 | particles(n)%tailpoints = 0 |
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| 367 | IF ( use_particle_tails .AND. & |
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| 368 | MOD( n, skip_particles_for_tail ) == 0 ) THEN |
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| 369 | number_of_tails = number_of_tails + 1 |
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| 370 | ! |
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| 371 | !-- This is a temporary provisional setting (see |
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| 372 | !-- further below!) |
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| 373 | particles(n)%tail_id = number_of_tails |
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| 374 | ELSE |
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| 375 | particles(n)%tail_id = 0 |
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| 376 | ENDIF |
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| 377 | |
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| 378 | ENDDO |
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| 379 | |
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| 380 | ENDIF |
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| 381 | |
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| 382 | pos_x = pos_x + pdx(i) |
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| 383 | |
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| 384 | ENDDO |
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| 385 | |
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| 386 | ENDIF |
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| 387 | |
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| 388 | pos_y = pos_y + pdy(i) |
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| 389 | |
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| 390 | ENDDO |
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| 391 | |
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| 392 | pos_z = pos_z + pdz(i) |
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| 393 | |
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| 394 | ENDDO |
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| 395 | |
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| 396 | ENDDO |
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| 397 | |
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| 398 | number_of_initial_particles = n |
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| 399 | number_of_particles = n |
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| 400 | |
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| 401 | ! |
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| 402 | !-- Calculate the number of particles and tails of the total domain |
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| 403 | #if defined( __parallel ) |
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[622] | 404 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
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[1] | 405 | CALL MPI_ALLREDUCE( number_of_particles, total_number_of_particles, 1, & |
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[16] | 406 | MPI_INTEGER, MPI_SUM, comm2d, ierr ) |
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[622] | 407 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
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[1] | 408 | CALL MPI_ALLREDUCE( number_of_tails, total_number_of_tails, 1, & |
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[16] | 409 | MPI_INTEGER, MPI_SUM, comm2d, ierr ) |
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[1] | 410 | #else |
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| 411 | total_number_of_particles = number_of_particles |
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| 412 | total_number_of_tails = number_of_tails |
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| 413 | #endif |
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| 414 | |
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| 415 | ! |
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| 416 | !-- Set a seed value for the random number generator to be exclusively |
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| 417 | !-- used for the particle code. The generated random numbers should be |
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| 418 | !-- different on the different PEs. |
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| 419 | iran_part = iran_part + myid |
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| 420 | |
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| 421 | ! |
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| 422 | !-- User modification of initial particles |
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[849] | 423 | CALL user_lpm_init |
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[1] | 424 | |
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| 425 | ! |
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| 426 | !-- Store the initial set of particles for release at later times |
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| 427 | IF ( number_of_initial_particles /= 0 ) THEN |
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| 428 | ALLOCATE( initial_particles(1:number_of_initial_particles) ) |
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| 429 | initial_particles(1:number_of_initial_particles) = & |
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| 430 | particles(1:number_of_initial_particles) |
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| 431 | ENDIF |
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| 432 | |
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| 433 | ! |
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| 434 | !-- Add random fluctuation to particle positions |
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| 435 | IF ( random_start_position ) THEN |
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| 436 | |
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| 437 | DO n = 1, number_of_initial_particles |
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| 438 | IF ( psl(particles(n)%group) /= psr(particles(n)%group) ) THEN |
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| 439 | particles(n)%x = particles(n)%x + & |
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[106] | 440 | ( random_function( iran_part ) - 0.5 ) * & |
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[1] | 441 | pdx(particles(n)%group) |
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| 442 | IF ( particles(n)%x <= ( nxl - 0.5 ) * dx ) THEN |
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| 443 | particles(n)%x = ( nxl - 0.4999999999 ) * dx |
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| 444 | ELSEIF ( particles(n)%x >= ( nxr + 0.5 ) * dx ) THEN |
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| 445 | particles(n)%x = ( nxr + 0.4999999999 ) * dx |
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| 446 | ENDIF |
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| 447 | ENDIF |
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| 448 | IF ( pss(particles(n)%group) /= psn(particles(n)%group) ) THEN |
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| 449 | particles(n)%y = particles(n)%y + & |
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[106] | 450 | ( random_function( iran_part ) - 0.5 ) * & |
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[1] | 451 | pdy(particles(n)%group) |
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| 452 | IF ( particles(n)%y <= ( nys - 0.5 ) * dy ) THEN |
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| 453 | particles(n)%y = ( nys - 0.4999999999 ) * dy |
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| 454 | ELSEIF ( particles(n)%y >= ( nyn + 0.5 ) * dy ) THEN |
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| 455 | particles(n)%y = ( nyn + 0.4999999999 ) * dy |
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| 456 | ENDIF |
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| 457 | ENDIF |
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| 458 | IF ( psb(particles(n)%group) /= pst(particles(n)%group) ) THEN |
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| 459 | particles(n)%z = particles(n)%z + & |
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[106] | 460 | ( random_function( iran_part ) - 0.5 ) * & |
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[1] | 461 | pdz(particles(n)%group) |
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| 462 | ENDIF |
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| 463 | ENDDO |
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| 464 | ENDIF |
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| 465 | |
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| 466 | ! |
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[117] | 467 | !-- Sort particles in the sequence the gridboxes are stored in the memory. |
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| 468 | !-- Only required if cloud droplets are used. |
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[849] | 469 | IF ( cloud_droplets ) CALL lpm_sort_arrays |
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[1] | 470 | |
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| 471 | ! |
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| 472 | !-- Open file for statistical informations about particle conditions |
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| 473 | IF ( write_particle_statistics ) THEN |
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| 474 | CALL check_open( 80 ) |
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| 475 | WRITE ( 80, 8000 ) current_timestep_number, simulated_time, & |
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| 476 | number_of_initial_particles, & |
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| 477 | maximum_number_of_particles |
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| 478 | CALL close_file( 80 ) |
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| 479 | ENDIF |
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| 480 | |
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| 481 | ! |
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| 482 | !-- Check if particles are really uniform in color and radius (dvrp_size) |
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| 483 | !-- (uniform_particles is preset TRUE) |
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| 484 | IF ( uniform_particles ) THEN |
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| 485 | IF ( number_of_initial_particles == 0 ) THEN |
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| 486 | uniform_particles_l = .TRUE. |
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| 487 | ELSE |
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| 488 | n = number_of_initial_particles |
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| 489 | IF ( MINVAL( particles(1:n)%dvrp_psize ) == & |
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| 490 | MAXVAL( particles(1:n)%dvrp_psize ) .AND. & |
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[828] | 491 | MINVAL( particles(1:n)%class ) == & |
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| 492 | MAXVAL( particles(1:n)%class ) ) THEN |
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[1] | 493 | uniform_particles_l = .TRUE. |
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| 494 | ELSE |
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| 495 | uniform_particles_l = .FALSE. |
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| 496 | ENDIF |
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| 497 | ENDIF |
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| 498 | |
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| 499 | #if defined( __parallel ) |
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[622] | 500 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
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[1] | 501 | CALL MPI_ALLREDUCE( uniform_particles_l, uniform_particles, 1, & |
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| 502 | MPI_LOGICAL, MPI_LAND, comm2d, ierr ) |
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| 503 | #else |
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| 504 | uniform_particles = uniform_particles_l |
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| 505 | #endif |
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| 506 | |
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| 507 | ENDIF |
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| 508 | |
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| 509 | ! |
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[336] | 510 | !-- Particles will probably become none-uniform, if their size and color |
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| 511 | !-- will be determined by flow variables |
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| 512 | IF ( particle_color /= 'none' .OR. particle_dvrpsize /= 'none' ) THEN |
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| 513 | uniform_particles = .FALSE. |
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| 514 | ENDIF |
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| 515 | |
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| 516 | ! |
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[1] | 517 | !-- Set the beginning of the particle tails and their age |
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| 518 | IF ( use_particle_tails ) THEN |
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| 519 | ! |
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[276] | 520 | !-- Choose the maximum number of tails with respect to the maximum number |
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| 521 | !-- of particles and skip_particles_for_tail |
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| 522 | maximum_number_of_tails = maximum_number_of_particles / & |
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| 523 | skip_particles_for_tail |
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| 524 | |
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[229] | 525 | ! |
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| 526 | !-- Create a minimum number of tails in case that there is no tail |
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| 527 | !-- initially (otherwise, index errors will occur when adressing the |
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| 528 | !-- arrays below) |
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| 529 | IF ( maximum_number_of_tails == 0 ) maximum_number_of_tails = 10 |
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[1] | 530 | |
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| 531 | ALLOCATE( particle_tail_coordinates(maximum_number_of_tailpoints,5, & |
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| 532 | maximum_number_of_tails), & |
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| 533 | new_tail_id(maximum_number_of_tails), & |
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| 534 | tail_mask(maximum_number_of_tails) ) |
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| 535 | |
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| 536 | particle_tail_coordinates = 0.0 |
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| 537 | minimum_tailpoint_distance = minimum_tailpoint_distance**2 |
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| 538 | number_of_initial_tails = number_of_tails |
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| 539 | |
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| 540 | nn = 0 |
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| 541 | DO n = 1, number_of_particles |
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| 542 | ! |
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| 543 | !-- Only for those particles marked above with a provisional tail_id |
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| 544 | !-- tails will be created. Particles now get their final tail_id. |
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| 545 | IF ( particles(n)%tail_id /= 0 ) THEN |
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| 546 | |
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| 547 | nn = nn + 1 |
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| 548 | particles(n)%tail_id = nn |
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| 549 | |
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| 550 | particle_tail_coordinates(1,1,nn) = particles(n)%x |
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| 551 | particle_tail_coordinates(1,2,nn) = particles(n)%y |
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| 552 | particle_tail_coordinates(1,3,nn) = particles(n)%z |
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[828] | 553 | particle_tail_coordinates(1,4,nn) = particles(n)%class |
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[1] | 554 | particles(n)%tailpoints = 1 |
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| 555 | IF ( minimum_tailpoint_distance /= 0.0 ) THEN |
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| 556 | particle_tail_coordinates(2,1,nn) = particles(n)%x |
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| 557 | particle_tail_coordinates(2,2,nn) = particles(n)%y |
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| 558 | particle_tail_coordinates(2,3,nn) = particles(n)%z |
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[828] | 559 | particle_tail_coordinates(2,4,nn) = particles(n)%class |
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[1] | 560 | particle_tail_coordinates(1:2,5,nn) = 0.0 |
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| 561 | particles(n)%tailpoints = 2 |
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| 562 | ENDIF |
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| 563 | |
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| 564 | ENDIF |
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| 565 | ENDDO |
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| 566 | ENDIF |
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| 567 | |
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| 568 | ! |
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| 569 | !-- Plot initial positions of particles (only if particle advection is |
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| 570 | !-- switched on from the beginning of the simulation (t=0)) |
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| 571 | IF ( particle_advection_start == 0.0 ) CALL data_output_dvrp |
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| 572 | |
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| 573 | ENDIF |
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| 574 | |
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| 575 | ! |
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| 576 | !-- Check boundary condition and set internal variables |
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| 577 | SELECT CASE ( bc_par_b ) |
---|
| 578 | |
---|
| 579 | CASE ( 'absorb' ) |
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| 580 | ibc_par_b = 1 |
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| 581 | |
---|
| 582 | CASE ( 'reflect' ) |
---|
| 583 | ibc_par_b = 2 |
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| 584 | |
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| 585 | CASE DEFAULT |
---|
[254] | 586 | WRITE( message_string, * ) 'unknown boundary condition ', & |
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| 587 | 'bc_par_b = "', TRIM( bc_par_b ), '"' |
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[849] | 588 | CALL message( 'lpm_init', 'PA0217', 1, 2, 0, 6, 0 ) |
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[1] | 589 | |
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| 590 | END SELECT |
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| 591 | SELECT CASE ( bc_par_t ) |
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| 592 | |
---|
| 593 | CASE ( 'absorb' ) |
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| 594 | ibc_par_t = 1 |
---|
| 595 | |
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| 596 | CASE ( 'reflect' ) |
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| 597 | ibc_par_t = 2 |
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| 598 | |
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| 599 | CASE DEFAULT |
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[254] | 600 | WRITE( message_string, * ) 'unknown boundary condition ', & |
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| 601 | 'bc_par_t = "', TRIM( bc_par_t ), '"' |
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[849] | 602 | CALL message( 'lpm_init', 'PA0218', 1, 2, 0, 6, 0 ) |
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[1] | 603 | |
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| 604 | END SELECT |
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| 605 | SELECT CASE ( bc_par_lr ) |
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| 606 | |
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| 607 | CASE ( 'cyclic' ) |
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| 608 | ibc_par_lr = 0 |
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| 609 | |
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| 610 | CASE ( 'absorb' ) |
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| 611 | ibc_par_lr = 1 |
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| 612 | |
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| 613 | CASE ( 'reflect' ) |
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| 614 | ibc_par_lr = 2 |
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| 615 | |
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| 616 | CASE DEFAULT |
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[254] | 617 | WRITE( message_string, * ) 'unknown boundary condition ', & |
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| 618 | 'bc_par_lr = "', TRIM( bc_par_lr ), '"' |
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[849] | 619 | CALL message( 'lpm_init', 'PA0219', 1, 2, 0, 6, 0 ) |
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[1] | 620 | |
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| 621 | END SELECT |
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| 622 | SELECT CASE ( bc_par_ns ) |
---|
| 623 | |
---|
| 624 | CASE ( 'cyclic' ) |
---|
| 625 | ibc_par_ns = 0 |
---|
| 626 | |
---|
| 627 | CASE ( 'absorb' ) |
---|
| 628 | ibc_par_ns = 1 |
---|
| 629 | |
---|
| 630 | CASE ( 'reflect' ) |
---|
| 631 | ibc_par_ns = 2 |
---|
| 632 | |
---|
| 633 | CASE DEFAULT |
---|
[254] | 634 | WRITE( message_string, * ) 'unknown boundary condition ', & |
---|
| 635 | 'bc_par_ns = "', TRIM( bc_par_ns ), '"' |
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[849] | 636 | CALL message( 'lpm_init', 'PA0220', 1, 2, 0, 6, 0 ) |
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[1] | 637 | |
---|
| 638 | END SELECT |
---|
| 639 | ! |
---|
| 640 | !-- Formats |
---|
| 641 | 8000 FORMAT (I6,1X,F7.2,4X,I6,71X,I6) |
---|
| 642 | |
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[849] | 643 | END SUBROUTINE lpm_init |
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