| 1 | SUBROUTINE init_particles |
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| 2 | |
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| 3 | !------------------------------------------------------------------------------! |
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| 4 | ! Current revisions: |
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| 5 | ! ----------------- |
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| 6 | ! |
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| 7 | ! Former revisions: |
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| 8 | ! ----------------- |
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| 9 | ! $Id: init_particles.f90 668 2010-12-23 13:22:58Z helmke $ |
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| 10 | ! |
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| 11 | ! 667 2010-12-23 12:06:00Z suehring/gryschka |
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| 12 | ! nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng for allocation |
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| 13 | ! of arrays. |
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| 14 | ! |
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| 15 | ! 622 2010-12-10 08:08:13Z raasch |
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| 16 | ! optional barriers included in order to speed up collective operations |
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| 17 | ! |
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| 18 | ! 336 2009-06-10 11:19:35Z raasch |
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| 19 | ! Maximum number of tails is calculated from maximum number of particles and |
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| 20 | ! skip_particles_for_tail, |
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| 21 | ! output of messages replaced by message handling routine |
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| 22 | ! Bugfix: arrays for tails are allocated with a minimum size of 10 tails if |
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| 23 | ! there is no tail initially |
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| 24 | ! |
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| 25 | ! 150 2008-02-29 08:19:58Z raasch |
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| 26 | ! Setting offset_ocean_* needed for calculating vertical indices within ocean |
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| 27 | ! runs |
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| 28 | ! |
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| 29 | ! 117 2007-10-11 03:27:59Z raasch |
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| 30 | ! Sorting of particles only in case of cloud droplets |
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| 31 | ! |
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| 32 | ! 106 2007-08-16 14:30:26Z raasch |
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| 33 | ! variable iran replaced by iran_part |
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| 34 | ! |
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| 35 | ! 82 2007-04-16 15:40:52Z raasch |
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| 36 | ! Preprocessor directives for old systems removed |
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| 37 | ! |
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| 38 | ! 70 2007-03-18 23:46:30Z raasch |
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| 39 | ! displacements for mpi_particle_type changed, age_m initialized, |
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| 40 | ! particles-package is now part of the default code |
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| 41 | ! |
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| 42 | ! 16 2007-02-15 13:16:47Z raasch |
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| 43 | ! Bugfix: MPI_REAL in MPI_ALLREDUCE replaced by MPI_INTEGER |
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| 44 | ! |
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| 45 | ! r4 | raasch | 2007-02-13 12:33:16 +0100 (Tue, 13 Feb 2007) |
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| 46 | ! RCS Log replace by Id keyword, revision history cleaned up |
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| 47 | ! |
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| 48 | ! Revision 1.24 2007/02/11 13:00:17 raasch |
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| 49 | ! Bugfix: allocation of tail_mask and new_tail_id in case of restart-runs |
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| 50 | ! Bugfix: __ was missing in a cpp-directive |
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| 51 | ! |
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| 52 | ! Revision 1.1 1999/11/25 16:22:38 raasch |
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| 53 | ! Initial revision |
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| 54 | ! |
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| 55 | ! |
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| 56 | ! Description: |
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| 57 | ! ------------ |
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| 58 | ! This routine initializes a set of particles and their attributes (position, |
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| 59 | ! radius, ..). Advection of these particles is carried out by advec_particles, |
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| 60 | ! plotting is done in data_output_dvrp. |
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| 61 | !------------------------------------------------------------------------------! |
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| 62 | |
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| 63 | USE arrays_3d |
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| 64 | USE control_parameters |
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| 65 | USE dvrp_variables |
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| 66 | USE grid_variables |
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| 67 | USE indices |
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| 68 | USE particle_attributes |
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| 69 | USE pegrid |
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| 70 | USE random_function_mod |
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| 71 | |
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| 72 | |
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| 73 | IMPLICIT NONE |
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| 74 | |
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| 75 | CHARACTER (LEN=10) :: particle_binary_version, version_on_file |
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| 76 | |
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| 77 | INTEGER :: i, j, n, nn |
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| 78 | #if defined( __parallel ) |
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| 79 | INTEGER, DIMENSION(3) :: blocklengths, displacements, types |
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| 80 | #endif |
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| 81 | LOGICAL :: uniform_particles_l |
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| 82 | REAL :: factor, pos_x, pos_y, pos_z, value |
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| 83 | |
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| 84 | |
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| 85 | #if defined( __parallel ) |
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| 86 | ! |
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| 87 | !-- Define MPI derived datatype for FORTRAN datatype particle_type (see module |
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| 88 | !-- particle_attributes). Integer length is 4 byte, Real is 8 byte |
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| 89 | blocklengths(1) = 19; blocklengths(2) = 4; blocklengths(3) = 1 |
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| 90 | displacements(1) = 0; displacements(2) = 152; displacements(3) = 168 |
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| 91 | |
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| 92 | types(1) = MPI_REAL |
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| 93 | types(2) = MPI_INTEGER |
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| 94 | types(3) = MPI_UB |
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| 95 | CALL MPI_TYPE_STRUCT( 3, blocklengths, displacements, types, & |
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| 96 | mpi_particle_type, ierr ) |
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| 97 | CALL MPI_TYPE_COMMIT( mpi_particle_type, ierr ) |
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| 98 | #endif |
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| 99 | |
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| 100 | ! |
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| 101 | !-- In case of oceans runs, the vertical index calculations need an offset, |
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| 102 | !-- because otherwise the k indices will become negative |
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| 103 | IF ( ocean ) THEN |
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| 104 | offset_ocean_nzt = nzt |
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| 105 | offset_ocean_nzt_m1 = nzt - 1 |
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| 106 | ENDIF |
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| 107 | |
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| 108 | |
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| 109 | ! |
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| 110 | !-- Check the number of particle groups. |
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| 111 | IF ( number_of_particle_groups > max_number_of_particle_groups ) THEN |
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| 112 | WRITE( message_string, * ) 'max_number_of_particle_groups =', & |
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| 113 | max_number_of_particle_groups , & |
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| 114 | '&number_of_particle_groups reset to ', & |
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| 115 | max_number_of_particle_groups |
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| 116 | CALL message( 'init_particles', 'PA0213', 0, 1, 0, 6, 0 ) |
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| 117 | number_of_particle_groups = max_number_of_particle_groups |
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| 118 | ENDIF |
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| 119 | |
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| 120 | ! |
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| 121 | !-- Set default start positions, if necessary |
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| 122 | IF ( psl(1) == 9999999.9 ) psl(1) = -0.5 * dx |
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| 123 | IF ( psr(1) == 9999999.9 ) psr(1) = ( nx + 0.5 ) * dx |
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| 124 | IF ( pss(1) == 9999999.9 ) pss(1) = -0.5 * dy |
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| 125 | IF ( psn(1) == 9999999.9 ) psn(1) = ( ny + 0.5 ) * dy |
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| 126 | IF ( psb(1) == 9999999.9 ) psb(1) = zu(nz/2) |
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| 127 | IF ( pst(1) == 9999999.9 ) pst(1) = psb(1) |
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| 128 | |
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| 129 | IF ( pdx(1) == 9999999.9 .OR. pdx(1) == 0.0 ) pdx(1) = dx |
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| 130 | IF ( pdy(1) == 9999999.9 .OR. pdy(1) == 0.0 ) pdy(1) = dy |
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| 131 | IF ( pdz(1) == 9999999.9 .OR. pdz(1) == 0.0 ) pdz(1) = zu(2) - zu(1) |
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| 132 | |
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| 133 | DO j = 2, number_of_particle_groups |
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| 134 | IF ( psl(j) == 9999999.9 ) psl(j) = psl(j-1) |
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| 135 | IF ( psr(j) == 9999999.9 ) psr(j) = psr(j-1) |
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| 136 | IF ( pss(j) == 9999999.9 ) pss(j) = pss(j-1) |
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| 137 | IF ( psn(j) == 9999999.9 ) psn(j) = psn(j-1) |
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| 138 | IF ( psb(j) == 9999999.9 ) psb(j) = psb(j-1) |
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| 139 | IF ( pst(j) == 9999999.9 ) pst(j) = pst(j-1) |
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| 140 | IF ( pdx(j) == 9999999.9 .OR. pdx(j) == 0.0 ) pdx(j) = pdx(j-1) |
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| 141 | IF ( pdy(j) == 9999999.9 .OR. pdy(j) == 0.0 ) pdy(j) = pdy(j-1) |
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| 142 | IF ( pdz(j) == 9999999.9 .OR. pdz(j) == 0.0 ) pdz(j) = pdz(j-1) |
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| 143 | ENDDO |
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| 144 | |
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| 145 | ! |
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| 146 | !-- For the first model run of a possible job chain initialize the |
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| 147 | !-- particles, otherwise read the particle data from file. |
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| 148 | IF ( TRIM( initializing_actions ) == 'read_restart_data' & |
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| 149 | .AND. read_particles_from_restartfile ) THEN |
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| 150 | |
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| 151 | ! |
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| 152 | !-- Read particle data from previous model run. |
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| 153 | !-- First open the input unit. |
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| 154 | IF ( myid_char == '' ) THEN |
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| 155 | OPEN ( 90, FILE='PARTICLE_RESTART_DATA_IN'//myid_char, & |
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| 156 | FORM='UNFORMATTED' ) |
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| 157 | ELSE |
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| 158 | OPEN ( 90, FILE='PARTICLE_RESTART_DATA_IN/'//myid_char, & |
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| 159 | FORM='UNFORMATTED' ) |
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| 160 | ENDIF |
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| 161 | |
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| 162 | ! |
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| 163 | !-- First compare the version numbers |
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| 164 | READ ( 90 ) version_on_file |
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| 165 | particle_binary_version = '3.0' |
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| 166 | IF ( TRIM( version_on_file ) /= TRIM( particle_binary_version ) ) THEN |
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| 167 | message_string = 'version mismatch concerning data from prior ' // & |
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| 168 | 'run &version on file = "' // & |
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| 169 | TRIM( version_on_file ) // & |
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| 170 | '&version in program = "' // & |
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| 171 | TRIM( particle_binary_version ) // '"' |
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| 172 | CALL message( 'init_particles', 'PA0214', 1, 2, 0, 6, 0 ) |
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| 173 | ENDIF |
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| 174 | |
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| 175 | ! |
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| 176 | !-- Read some particle parameters and the size of the particle arrays, |
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| 177 | !-- allocate them and read their contents. |
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| 178 | READ ( 90 ) bc_par_b, bc_par_lr, bc_par_ns, bc_par_t, & |
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| 179 | maximum_number_of_particles, maximum_number_of_tailpoints, & |
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| 180 | maximum_number_of_tails, number_of_initial_particles, & |
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| 181 | number_of_particles, number_of_particle_groups, & |
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| 182 | number_of_tails, particle_groups, time_prel, & |
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| 183 | time_write_particle_data, uniform_particles |
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| 184 | |
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| 185 | IF ( number_of_initial_particles /= 0 ) THEN |
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| 186 | ALLOCATE( initial_particles(1:number_of_initial_particles) ) |
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| 187 | READ ( 90 ) initial_particles |
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| 188 | ENDIF |
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| 189 | |
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| 190 | ALLOCATE( prt_count(nzb:nzt+1,nysg:nyng,nxlg:nxrg), & |
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| 191 | prt_start_index(nzb:nzt+1,nysg:nyng,nxlg:nxrg), & |
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| 192 | particle_mask(maximum_number_of_particles), & |
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| 193 | particles(maximum_number_of_particles) ) |
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| 194 | |
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| 195 | READ ( 90 ) prt_count, prt_start_index |
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| 196 | READ ( 90 ) particles |
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| 197 | |
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| 198 | IF ( use_particle_tails ) THEN |
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| 199 | ALLOCATE( particle_tail_coordinates(maximum_number_of_tailpoints,5, & |
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| 200 | maximum_number_of_tails), & |
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| 201 | new_tail_id(maximum_number_of_tails), & |
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| 202 | tail_mask(maximum_number_of_tails) ) |
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| 203 | READ ( 90 ) particle_tail_coordinates |
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| 204 | ENDIF |
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| 205 | |
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| 206 | CLOSE ( 90 ) |
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| 207 | |
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| 208 | ELSE |
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| 209 | |
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| 210 | ! |
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| 211 | !-- Allocate particle arrays and set attributes of the initial set of |
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| 212 | !-- particles, which can be also periodically released at later times. |
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| 213 | !-- Also allocate array for particle tail coordinates, if needed. |
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| 214 | ALLOCATE( prt_count(nzb:nzt+1,nysg:nyng,nxlg:nxrg), & |
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| 215 | prt_start_index(nzb:nzt+1,nysg:nyng,nxlg:nxrg), & |
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| 216 | particle_mask(maximum_number_of_particles), & |
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| 217 | particles(maximum_number_of_particles) ) |
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| 218 | |
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| 219 | ! |
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| 220 | !-- Initialize all particles with dummy values (otherwise errors may |
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| 221 | !-- occur within restart runs). The reason for this is still not clear |
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| 222 | !-- and may be presumably caused by errors in the respective user-interface. |
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| 223 | 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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| 224 | 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, & |
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| 225 | 0.0, 0, 0, 0, 0 ) |
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| 226 | particle_groups = particle_groups_type( 0.0, 0.0, 0.0, 0.0 ) |
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| 227 | |
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| 228 | ! |
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| 229 | !-- Set the default particle size used for dvrp plots |
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| 230 | IF ( dvrp_psize == 9999999.9 ) dvrp_psize = 0.2 * dx |
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| 231 | |
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| 232 | ! |
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| 233 | !-- Set values for the density ratio and radius for all particle |
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| 234 | !-- groups, if necessary |
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| 235 | IF ( density_ratio(1) == 9999999.9 ) density_ratio(1) = 0.0 |
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| 236 | IF ( radius(1) == 9999999.9 ) radius(1) = 0.0 |
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| 237 | DO i = 2, number_of_particle_groups |
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| 238 | IF ( density_ratio(i) == 9999999.9 ) THEN |
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| 239 | density_ratio(i) = density_ratio(i-1) |
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| 240 | ENDIF |
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| 241 | IF ( radius(i) == 9999999.9 ) radius(i) = radius(i-1) |
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| 242 | ENDDO |
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| 243 | |
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| 244 | DO i = 1, number_of_particle_groups |
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| 245 | IF ( density_ratio(i) /= 0.0 .AND. radius(i) == 0 ) THEN |
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| 246 | WRITE( message_string, * ) 'particle group #', i, 'has a', & |
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| 247 | 'density ratio /= 0 but radius = 0' |
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| 248 | CALL message( 'init_particles', 'PA0215', 1, 2, 0, 6, 0 ) |
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| 249 | ENDIF |
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| 250 | particle_groups(i)%density_ratio = density_ratio(i) |
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| 251 | particle_groups(i)%radius = radius(i) |
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| 252 | ENDDO |
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| 253 | |
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| 254 | ! |
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| 255 | !-- Calculate particle positions and store particle attributes, if |
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| 256 | !-- particle is situated on this PE |
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| 257 | n = 0 |
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| 258 | |
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| 259 | DO i = 1, number_of_particle_groups |
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| 260 | |
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| 261 | pos_z = psb(i) |
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| 262 | |
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| 263 | DO WHILE ( pos_z <= pst(i) ) |
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| 264 | |
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| 265 | pos_y = pss(i) |
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| 266 | |
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| 267 | DO WHILE ( pos_y <= psn(i) ) |
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| 268 | |
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| 269 | IF ( pos_y >= ( nys - 0.5 ) * dy .AND. & |
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| 270 | pos_y < ( nyn + 0.5 ) * dy ) THEN |
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| 271 | |
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| 272 | pos_x = psl(i) |
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| 273 | |
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| 274 | DO WHILE ( pos_x <= psr(i) ) |
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| 275 | |
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| 276 | IF ( pos_x >= ( nxl - 0.5 ) * dx .AND. & |
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| 277 | pos_x < ( nxr + 0.5 ) * dx ) THEN |
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| 278 | |
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| 279 | DO j = 1, particles_per_point |
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| 280 | |
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| 281 | n = n + 1 |
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| 282 | IF ( n > maximum_number_of_particles ) THEN |
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| 283 | WRITE( message_string, * ) 'number of initial', & |
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| 284 | 'particles (', n, ') exceeds', & |
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| 285 | '&maximum_number_of_particles (', & |
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| 286 | maximum_number_of_particles, ') on PE ', & |
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| 287 | myid |
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| 288 | CALL message( 'init_particles', 'PA0216', & |
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| 289 | 2, 2, -1, 6, 1 ) |
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| 290 | ENDIF |
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| 291 | particles(n)%x = pos_x |
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| 292 | particles(n)%y = pos_y |
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| 293 | particles(n)%z = pos_z |
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| 294 | particles(n)%age = 0.0 |
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| 295 | particles(n)%age_m = 0.0 |
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| 296 | particles(n)%dt_sum = 0.0 |
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| 297 | particles(n)%dvrp_psize = dvrp_psize |
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| 298 | particles(n)%e_m = 0.0 |
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| 299 | particles(n)%speed_x = 0.0 |
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| 300 | particles(n)%speed_x_sgs = 0.0 |
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| 301 | particles(n)%speed_y = 0.0 |
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| 302 | particles(n)%speed_y_sgs = 0.0 |
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| 303 | particles(n)%speed_z = 0.0 |
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| 304 | particles(n)%speed_z_sgs = 0.0 |
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| 305 | particles(n)%origin_x = pos_x |
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| 306 | particles(n)%origin_y = pos_y |
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| 307 | particles(n)%origin_z = pos_z |
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| 308 | particles(n)%radius = particle_groups(i)%radius |
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| 309 | particles(n)%weight_factor =initial_weighting_factor |
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| 310 | particles(n)%color = 1 |
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| 311 | particles(n)%group = i |
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| 312 | particles(n)%tailpoints = 0 |
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| 313 | IF ( use_particle_tails .AND. & |
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| 314 | MOD( n, skip_particles_for_tail ) == 0 ) THEN |
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| 315 | number_of_tails = number_of_tails + 1 |
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| 316 | ! |
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| 317 | !-- This is a temporary provisional setting (see |
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| 318 | !-- further below!) |
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| 319 | particles(n)%tail_id = number_of_tails |
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| 320 | ELSE |
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| 321 | particles(n)%tail_id = 0 |
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| 322 | ENDIF |
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| 323 | |
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| 324 | ENDDO |
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| 325 | |
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| 326 | ENDIF |
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| 327 | |
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| 328 | pos_x = pos_x + pdx(i) |
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| 329 | |
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| 330 | ENDDO |
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| 331 | |
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| 332 | ENDIF |
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| 333 | |
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| 334 | pos_y = pos_y + pdy(i) |
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| 335 | |
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| 336 | ENDDO |
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| 337 | |
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| 338 | pos_z = pos_z + pdz(i) |
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| 339 | |
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| 340 | ENDDO |
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| 341 | |
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| 342 | ENDDO |
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| 343 | |
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| 344 | number_of_initial_particles = n |
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| 345 | number_of_particles = n |
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| 346 | |
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| 347 | ! |
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| 348 | !-- Calculate the number of particles and tails of the total domain |
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| 349 | #if defined( __parallel ) |
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| 350 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
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| 351 | CALL MPI_ALLREDUCE( number_of_particles, total_number_of_particles, 1, & |
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| 352 | MPI_INTEGER, MPI_SUM, comm2d, ierr ) |
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| 353 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
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| 354 | CALL MPI_ALLREDUCE( number_of_tails, total_number_of_tails, 1, & |
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| 355 | MPI_INTEGER, MPI_SUM, comm2d, ierr ) |
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| 356 | #else |
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| 357 | total_number_of_particles = number_of_particles |
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| 358 | total_number_of_tails = number_of_tails |
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| 359 | #endif |
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| 360 | |
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| 361 | ! |
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| 362 | !-- Set a seed value for the random number generator to be exclusively |
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| 363 | !-- used for the particle code. The generated random numbers should be |
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| 364 | !-- different on the different PEs. |
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| 365 | iran_part = iran_part + myid |
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| 366 | |
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| 367 | ! |
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| 368 | !-- User modification of initial particles |
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| 369 | CALL user_init_particles |
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| 370 | |
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| 371 | ! |
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| 372 | !-- Store the initial set of particles for release at later times |
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| 373 | IF ( number_of_initial_particles /= 0 ) THEN |
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| 374 | ALLOCATE( initial_particles(1:number_of_initial_particles) ) |
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| 375 | initial_particles(1:number_of_initial_particles) = & |
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| 376 | particles(1:number_of_initial_particles) |
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| 377 | ENDIF |
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| 378 | |
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| 379 | ! |
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| 380 | !-- Add random fluctuation to particle positions |
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| 381 | IF ( random_start_position ) THEN |
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| 382 | |
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| 383 | DO n = 1, number_of_initial_particles |
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| 384 | IF ( psl(particles(n)%group) /= psr(particles(n)%group) ) THEN |
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| 385 | particles(n)%x = particles(n)%x + & |
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| 386 | ( random_function( iran_part ) - 0.5 ) * & |
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| 387 | pdx(particles(n)%group) |
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| 388 | IF ( particles(n)%x <= ( nxl - 0.5 ) * dx ) THEN |
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| 389 | particles(n)%x = ( nxl - 0.4999999999 ) * dx |
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| 390 | ELSEIF ( particles(n)%x >= ( nxr + 0.5 ) * dx ) THEN |
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| 391 | particles(n)%x = ( nxr + 0.4999999999 ) * dx |
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| 392 | ENDIF |
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| 393 | ENDIF |
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| 394 | IF ( pss(particles(n)%group) /= psn(particles(n)%group) ) THEN |
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| 395 | particles(n)%y = particles(n)%y + & |
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| 396 | ( random_function( iran_part ) - 0.5 ) * & |
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| 397 | pdy(particles(n)%group) |
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| 398 | IF ( particles(n)%y <= ( nys - 0.5 ) * dy ) THEN |
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| 399 | particles(n)%y = ( nys - 0.4999999999 ) * dy |
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| 400 | ELSEIF ( particles(n)%y >= ( nyn + 0.5 ) * dy ) THEN |
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| 401 | particles(n)%y = ( nyn + 0.4999999999 ) * dy |
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| 402 | ENDIF |
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| 403 | ENDIF |
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| 404 | IF ( psb(particles(n)%group) /= pst(particles(n)%group) ) THEN |
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| 405 | particles(n)%z = particles(n)%z + & |
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| 406 | ( random_function( iran_part ) - 0.5 ) * & |
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| 407 | pdz(particles(n)%group) |
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| 408 | ENDIF |
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| 409 | ENDDO |
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| 410 | ENDIF |
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| 411 | |
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| 412 | ! |
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| 413 | !-- Sort particles in the sequence the gridboxes are stored in the memory. |
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| 414 | !-- Only required if cloud droplets are used. |
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| 415 | IF ( cloud_droplets ) CALL sort_particles |
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| 416 | |
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| 417 | ! |
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| 418 | !-- Open file for statistical informations about particle conditions |
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| 419 | IF ( write_particle_statistics ) THEN |
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| 420 | CALL check_open( 80 ) |
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| 421 | WRITE ( 80, 8000 ) current_timestep_number, simulated_time, & |
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| 422 | number_of_initial_particles, & |
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| 423 | maximum_number_of_particles |
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| 424 | CALL close_file( 80 ) |
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| 425 | ENDIF |
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| 426 | |
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| 427 | ! |
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| 428 | !-- Check if particles are really uniform in color and radius (dvrp_size) |
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| 429 | !-- (uniform_particles is preset TRUE) |
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| 430 | IF ( uniform_particles ) THEN |
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| 431 | IF ( number_of_initial_particles == 0 ) THEN |
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| 432 | uniform_particles_l = .TRUE. |
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| 433 | ELSE |
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| 434 | n = number_of_initial_particles |
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| 435 | IF ( MINVAL( particles(1:n)%dvrp_psize ) == & |
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| 436 | MAXVAL( particles(1:n)%dvrp_psize ) .AND. & |
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| 437 | MINVAL( particles(1:n)%color ) == & |
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| 438 | MAXVAL( particles(1:n)%color ) ) THEN |
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| 439 | uniform_particles_l = .TRUE. |
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| 440 | ELSE |
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| 441 | uniform_particles_l = .FALSE. |
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| 442 | ENDIF |
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| 443 | ENDIF |
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| 444 | |
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| 445 | #if defined( __parallel ) |
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| 446 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
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| 447 | CALL MPI_ALLREDUCE( uniform_particles_l, uniform_particles, 1, & |
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| 448 | MPI_LOGICAL, MPI_LAND, comm2d, ierr ) |
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| 449 | #else |
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| 450 | uniform_particles = uniform_particles_l |
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| 451 | #endif |
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| 452 | |
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| 453 | ENDIF |
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| 454 | |
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| 455 | ! |
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| 456 | !-- Particles will probably become none-uniform, if their size and color |
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| 457 | !-- will be determined by flow variables |
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| 458 | IF ( particle_color /= 'none' .OR. particle_dvrpsize /= 'none' ) THEN |
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| 459 | uniform_particles = .FALSE. |
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| 460 | ENDIF |
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| 461 | |
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| 462 | ! |
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| 463 | !-- Set the beginning of the particle tails and their age |
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| 464 | IF ( use_particle_tails ) THEN |
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| 465 | ! |
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| 466 | !-- Choose the maximum number of tails with respect to the maximum number |
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| 467 | !-- of particles and skip_particles_for_tail |
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| 468 | maximum_number_of_tails = maximum_number_of_particles / & |
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| 469 | skip_particles_for_tail |
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| 470 | |
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| 471 | ! |
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| 472 | !-- Create a minimum number of tails in case that there is no tail |
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| 473 | !-- initially (otherwise, index errors will occur when adressing the |
|---|
| 474 | !-- arrays below) |
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| 475 | IF ( maximum_number_of_tails == 0 ) maximum_number_of_tails = 10 |
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| 476 | |
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| 477 | ALLOCATE( particle_tail_coordinates(maximum_number_of_tailpoints,5, & |
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| 478 | maximum_number_of_tails), & |
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| 479 | new_tail_id(maximum_number_of_tails), & |
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| 480 | tail_mask(maximum_number_of_tails) ) |
|---|
| 481 | |
|---|
| 482 | particle_tail_coordinates = 0.0 |
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| 483 | minimum_tailpoint_distance = minimum_tailpoint_distance**2 |
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| 484 | number_of_initial_tails = number_of_tails |
|---|
| 485 | |
|---|
| 486 | nn = 0 |
|---|
| 487 | DO n = 1, number_of_particles |
|---|
| 488 | ! |
|---|
| 489 | !-- Only for those particles marked above with a provisional tail_id |
|---|
| 490 | !-- tails will be created. Particles now get their final tail_id. |
|---|
| 491 | IF ( particles(n)%tail_id /= 0 ) THEN |
|---|
| 492 | |
|---|
| 493 | nn = nn + 1 |
|---|
| 494 | particles(n)%tail_id = nn |
|---|
| 495 | |
|---|
| 496 | particle_tail_coordinates(1,1,nn) = particles(n)%x |
|---|
| 497 | particle_tail_coordinates(1,2,nn) = particles(n)%y |
|---|
| 498 | particle_tail_coordinates(1,3,nn) = particles(n)%z |
|---|
| 499 | particle_tail_coordinates(1,4,nn) = particles(n)%color |
|---|
| 500 | particles(n)%tailpoints = 1 |
|---|
| 501 | IF ( minimum_tailpoint_distance /= 0.0 ) THEN |
|---|
| 502 | particle_tail_coordinates(2,1,nn) = particles(n)%x |
|---|
| 503 | particle_tail_coordinates(2,2,nn) = particles(n)%y |
|---|
| 504 | particle_tail_coordinates(2,3,nn) = particles(n)%z |
|---|
| 505 | particle_tail_coordinates(2,4,nn) = particles(n)%color |
|---|
| 506 | particle_tail_coordinates(1:2,5,nn) = 0.0 |
|---|
| 507 | particles(n)%tailpoints = 2 |
|---|
| 508 | ENDIF |
|---|
| 509 | |
|---|
| 510 | ENDIF |
|---|
| 511 | ENDDO |
|---|
| 512 | ENDIF |
|---|
| 513 | |
|---|
| 514 | ! |
|---|
| 515 | !-- Plot initial positions of particles (only if particle advection is |
|---|
| 516 | !-- switched on from the beginning of the simulation (t=0)) |
|---|
| 517 | IF ( particle_advection_start == 0.0 ) CALL data_output_dvrp |
|---|
| 518 | |
|---|
| 519 | ENDIF |
|---|
| 520 | |
|---|
| 521 | ! |
|---|
| 522 | !-- Check boundary condition and set internal variables |
|---|
| 523 | SELECT CASE ( bc_par_b ) |
|---|
| 524 | |
|---|
| 525 | CASE ( 'absorb' ) |
|---|
| 526 | ibc_par_b = 1 |
|---|
| 527 | |
|---|
| 528 | CASE ( 'reflect' ) |
|---|
| 529 | ibc_par_b = 2 |
|---|
| 530 | |
|---|
| 531 | CASE DEFAULT |
|---|
| 532 | WRITE( message_string, * ) 'unknown boundary condition ', & |
|---|
| 533 | 'bc_par_b = "', TRIM( bc_par_b ), '"' |
|---|
| 534 | CALL message( 'init_particles', 'PA0217', 1, 2, 0, 6, 0 ) |
|---|
| 535 | |
|---|
| 536 | END SELECT |
|---|
| 537 | SELECT CASE ( bc_par_t ) |
|---|
| 538 | |
|---|
| 539 | CASE ( 'absorb' ) |
|---|
| 540 | ibc_par_t = 1 |
|---|
| 541 | |
|---|
| 542 | CASE ( 'reflect' ) |
|---|
| 543 | ibc_par_t = 2 |
|---|
| 544 | |
|---|
| 545 | CASE DEFAULT |
|---|
| 546 | WRITE( message_string, * ) 'unknown boundary condition ', & |
|---|
| 547 | 'bc_par_t = "', TRIM( bc_par_t ), '"' |
|---|
| 548 | CALL message( 'init_particles', 'PA0218', 1, 2, 0, 6, 0 ) |
|---|
| 549 | |
|---|
| 550 | END SELECT |
|---|
| 551 | SELECT CASE ( bc_par_lr ) |
|---|
| 552 | |
|---|
| 553 | CASE ( 'cyclic' ) |
|---|
| 554 | ibc_par_lr = 0 |
|---|
| 555 | |
|---|
| 556 | CASE ( 'absorb' ) |
|---|
| 557 | ibc_par_lr = 1 |
|---|
| 558 | |
|---|
| 559 | CASE ( 'reflect' ) |
|---|
| 560 | ibc_par_lr = 2 |
|---|
| 561 | |
|---|
| 562 | CASE DEFAULT |
|---|
| 563 | WRITE( message_string, * ) 'unknown boundary condition ', & |
|---|
| 564 | 'bc_par_lr = "', TRIM( bc_par_lr ), '"' |
|---|
| 565 | CALL message( 'init_particles', 'PA0219', 1, 2, 0, 6, 0 ) |
|---|
| 566 | |
|---|
| 567 | END SELECT |
|---|
| 568 | SELECT CASE ( bc_par_ns ) |
|---|
| 569 | |
|---|
| 570 | CASE ( 'cyclic' ) |
|---|
| 571 | ibc_par_ns = 0 |
|---|
| 572 | |
|---|
| 573 | CASE ( 'absorb' ) |
|---|
| 574 | ibc_par_ns = 1 |
|---|
| 575 | |
|---|
| 576 | CASE ( 'reflect' ) |
|---|
| 577 | ibc_par_ns = 2 |
|---|
| 578 | |
|---|
| 579 | CASE DEFAULT |
|---|
| 580 | WRITE( message_string, * ) 'unknown boundary condition ', & |
|---|
| 581 | 'bc_par_ns = "', TRIM( bc_par_ns ), '"' |
|---|
| 582 | CALL message( 'init_particles', 'PA0220', 1, 2, 0, 6, 0 ) |
|---|
| 583 | |
|---|
| 584 | END SELECT |
|---|
| 585 | ! |
|---|
| 586 | !-- Formats |
|---|
| 587 | 8000 FORMAT (I6,1X,F7.2,4X,I6,71X,I6) |
|---|
| 588 | |
|---|
| 589 | END SUBROUTINE init_particles |
|---|
