| 1 | SUBROUTINE init_particles |
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| 2 | |
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| 3 | !------------------------------------------------------------------------------! |
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| 4 | ! Actual revisions: |
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| 5 | ! ----------------- |
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| 6 | ! |
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| 7 | ! |
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| 8 | ! Former revisions: |
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| 9 | ! ----------------- |
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| 10 | ! $Log: init_particles.f90,v $ |
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| 11 | ! Revision 1.24 2007/02/11 13:00:17 raasch |
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| 12 | ! Bugfix: allocation of tail_mask and new_tail_id in case of restart-runs |
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| 13 | ! Bugfix: __ was missing in a cpp-directive |
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| 14 | ! |
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| 15 | ! Revision 1.23 2006/08/22 14:11:08 raasch |
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| 16 | ! Default settings of particle start positions changed |
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| 17 | ! |
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| 18 | ! Revision 1.22 2006/08/04 14:44:58 raasch |
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| 19 | ! New particles attributes initialized (e_m, dt_sum, speed_x/y/z_sgs), |
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| 20 | ! total length of mpi_particle_type adjusted, more than one particle can be |
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| 21 | ! released per point, izuf renamed iran, set a special seed value iran_part |
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| 22 | ! to be used for the particle advection code, determination of particle group |
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| 23 | ! number removed from header to here |
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| 24 | ! |
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| 25 | ! Revision 1.21 2006/03/14 12:55:24 raasch |
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| 26 | ! Determination of the number of particle groups removed |
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| 27 | ! |
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| 28 | ! Revision 1.20 2006/02/23 12:34:00 raasch |
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| 29 | ! Allocation of prt_start_index and prt_count + calling subroutine |
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| 30 | ! sort_particles, |
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| 31 | ! particle source parameters psl, psr, pss, psn, psb, pst, pdx, pdy, pdz are now |
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| 32 | ! 1D arrays (1:max_number_of_particle_groups) and allow up to specify |
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| 33 | ! max_number_of_particle_groups different sources by setting |
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| 34 | ! number_of_particle_groups >= 1 even if density_ratio is not specified, |
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| 35 | ! only a fraction of the particles may have tails, therefore input from unit 90 |
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| 36 | ! has changed, |
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| 37 | ! 0.5 replaced by 0.4999999999 in setting the random fluctuations, |
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| 38 | ! Defaults of psl, psr, pss, psn adjusted. |
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| 39 | ! If the number of particle groups is set by the user, density_ratio is reset to |
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| 40 | ! default. |
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| 41 | ! In case of user-specified pdx, pdy, pdz = 0.0 reset them to defaults, |
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| 42 | ! improve particle release at PE boundaries, nt_anz renamed |
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| 43 | ! current_timestep_number |
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| 44 | ! |
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| 45 | ! Revision 1.19 2005/06/26 19:56:47 raasch |
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| 46 | ! particle_groups%radius is used instead of diameter, particle%radius is |
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| 47 | ! initialized, new initial informations about radius and weighting factor |
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| 48 | ! stored on array particles, total length of mpi_particle_type adjusted |
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| 49 | ! |
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| 50 | ! Revision 1.18 2004/04/30 12:03:28 raasch |
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| 51 | ! MPI data type for particles modified due to modification of FORTRAN particle |
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| 52 | ! type |
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| 53 | ! |
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| 54 | ! Revision 1.17 2003/10/29 08:55:35 raasch |
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| 55 | ! Module random_function_mod is used, version check of the binary file, |
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| 56 | ! modifications for new particle group feature |
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| 57 | ! |
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| 58 | ! Revision 1.16 2003/03/16 09:39:51 raasch |
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| 59 | ! Two underscores (_) are placed in front of all define-strings |
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| 60 | ! |
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| 61 | ! Revision 1.15 2003/03/04 11:30:48 raasch |
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| 62 | ! Displacement for integers in mpi_particle_type reduced from 16 to 8 on |
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| 63 | ! ibm, since integers seem to be only 4 byte long. Accordingly, total length |
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| 64 | ! reduced from 104 to 96. |
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| 65 | ! |
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| 66 | ! Revision 1.14 2002/12/19 15:39:48 raasch |
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| 67 | ! STOP statement replaced by call of subroutine local_stop |
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| 68 | ! |
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| 69 | ! Revision 1.13 2002/09/12 13:04:13 raasch |
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| 70 | ! Read density_ratio from restart file |
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| 71 | ! |
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| 72 | ! Revision 1.12 2002/04/16 08:08:34 raasch |
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| 73 | ! New initial informations about speed components and start positions stored on |
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| 74 | ! array particles. Check boundary conditions and read them from restart file. |
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| 75 | ! |
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| 76 | ! Revision 1.11 2001/11/12 16:06:06 raasch |
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| 77 | ! Array particle_tail_coordinates extended to contain colour informations, |
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| 78 | ! reading particle data from restart file can be prohibited |
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| 79 | ! |
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| 80 | ! Revision 1.9 2001/08/21 09:49:05 raasch |
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| 81 | ! Particle tail is initialized |
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| 82 | ! |
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| 83 | ! Revision 1.8 2001/07/12 12:10:58 raasch |
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| 84 | ! Particle sources (starting positions) are now controlled by parameters |
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| 85 | ! |
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| 86 | ! Revision 1.7 2001/03/30 07:31:37 raasch |
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| 87 | ! Translation of remaining German identifiers (variables, subroutines, etc.) |
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| 88 | ! |
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| 89 | ! Revision 1.6 2001/01/25 07:05:36 raasch |
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| 90 | ! Writing of particle informations is optional now |
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| 91 | ! |
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| 92 | ! Revision 1.5 2001/01/22 07:16:17 raasch |
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| 93 | ! Module test_particles removed |
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| 94 | ! |
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| 95 | ! Revision 1.4 2001/01/02 17:30:16 raasch |
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| 96 | ! Opening of unit 80 moved to check_open. Unit 90 instead of 81 is used |
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| 97 | ! for binary input. |
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| 98 | ! |
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| 99 | ! Revision 1.3 2000/12/28 13:15:58 raasch |
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| 100 | ! Complete revision due to new features of dvrp-software, |
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| 101 | ! all comments translated into English, |
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| 102 | ! code is used only optionally (cpp-directives are added) |
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| 103 | ! |
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| 104 | ! Revision 1.2 2000/04/27 06:38:48 raasch |
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| 105 | ! compute position of camera with new indepent routine vtk_camera and |
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| 106 | ! store result on a separate file |
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| 107 | ! |
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| 108 | ! Revision 1.1 1999/11/25 16:22:38 raasch |
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| 109 | ! Initial revision |
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| 110 | ! |
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| 111 | ! |
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| 112 | ! Description: |
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| 113 | ! ------------ |
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| 114 | ! This routine initializes a set of particles and their attributes (position, |
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| 115 | ! radius, ..). Advection of these particles is carried out by advec_particles, |
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| 116 | ! plotting is done in data_output_dvrp. |
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| 117 | !------------------------------------------------------------------------------! |
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| 118 | #if defined( __particles ) |
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| 119 | |
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| 120 | USE arrays_3d |
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| 121 | USE control_parameters |
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| 122 | USE grid_variables |
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| 123 | USE indices |
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| 124 | USE particle_attributes |
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| 125 | USE pegrid |
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| 126 | USE random_function_mod |
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| 127 | |
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| 128 | |
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| 129 | IMPLICIT NONE |
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| 130 | |
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| 131 | CHARACTER (LEN=10) :: particle_binary_version, version_on_file |
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| 132 | |
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| 133 | INTEGER :: i, j, n, nn |
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| 134 | #if defined( __parallel ) |
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| 135 | INTEGER, DIMENSION(3) :: blocklengths, displacements, types |
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| 136 | #endif |
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| 137 | LOGICAL :: uniform_particles_l |
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| 138 | REAL :: factor, pos_x, pos_y, pos_z, value |
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| 139 | |
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| 140 | |
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| 141 | #if defined( __parallel ) |
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| 142 | ! |
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| 143 | !-- Define MPI derived datatype for FORTRAN datatype particle_type (see module |
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| 144 | !-- particle_attributes). Integer length is 4 byte, Real is 8 byte (=> total |
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| 145 | !-- length 100, nevertheless, 120 bytes are needed on T3E since integer seems |
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| 146 | !-- to be 8 bytes long there) |
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| 147 | blocklengths(1) = 18; blocklengths(2) = 4; blocklengths(3) = 1 |
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| 148 | #if defined( __t3eb ) |
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| 149 | displacements(1) = 0; displacements(2) = 144; displacements(3) = 176 |
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| 150 | #else |
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| 151 | displacements(1) = 0; displacements(2) = 144; displacements(3) = 160 |
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| 152 | #endif |
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| 153 | types(1) = MPI_REAL |
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| 154 | types(2) = MPI_INTEGER |
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| 155 | types(3) = MPI_UB |
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| 156 | CALL MPI_TYPE_STRUCT( 3, blocklengths, displacements, types, & |
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| 157 | mpi_particle_type, ierr ) |
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| 158 | CALL MPI_TYPE_COMMIT( mpi_particle_type, ierr ) |
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| 159 | #endif |
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| 160 | |
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| 161 | ! |
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| 162 | !-- Check the number of particle groups. |
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| 163 | IF ( number_of_particle_groups > max_number_of_particle_groups ) THEN |
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| 164 | PRINT*, '+++ WARNING: init_particles: ', & |
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| 165 | 'max_number_of_particle_groups =', & |
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| 166 | max_number_of_particle_groups |
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| 167 | PRINT*, '+++ number_of_particle_groups reset to ', & |
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| 168 | max_number_of_particle_groups |
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| 169 | number_of_particle_groups = max_number_of_particle_groups |
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| 170 | ENDIF |
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| 171 | |
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| 172 | ! |
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| 173 | !-- Set default start positions, if necessary |
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| 174 | IF ( psl(1) == 9999999.9 ) psl(1) = -0.5 * dx |
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| 175 | IF ( psr(1) == 9999999.9 ) psr(1) = ( nx + 0.5 ) * dx |
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| 176 | IF ( pss(1) == 9999999.9 ) pss(1) = -0.5 * dy |
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| 177 | IF ( psn(1) == 9999999.9 ) psn(1) = ( ny + 0.5 ) * dy |
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| 178 | IF ( psb(1) == 9999999.9 ) psb(1) = zu(nz/2) |
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| 179 | IF ( pst(1) == 9999999.9 ) pst(1) = psb(1) |
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| 180 | |
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| 181 | IF ( pdx(1) == 9999999.9 .OR. pdx(1) == 0.0 ) pdx(1) = dx |
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| 182 | IF ( pdy(1) == 9999999.9 .OR. pdy(1) == 0.0 ) pdy(1) = dy |
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| 183 | IF ( pdz(1) == 9999999.9 .OR. pdz(1) == 0.0 ) pdz(1) = zu(2) - zu(1) |
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| 184 | |
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| 185 | DO j = 2, number_of_particle_groups |
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| 186 | IF ( psl(j) == 9999999.9 ) psl(j) = psl(j-1) |
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| 187 | IF ( psr(j) == 9999999.9 ) psr(j) = psr(j-1) |
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| 188 | IF ( pss(j) == 9999999.9 ) pss(j) = pss(j-1) |
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| 189 | IF ( psn(j) == 9999999.9 ) psn(j) = psn(j-1) |
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| 190 | IF ( psb(j) == 9999999.9 ) psb(j) = psb(j-1) |
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| 191 | IF ( pst(j) == 9999999.9 ) pst(j) = pst(j-1) |
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| 192 | IF ( pdx(j) == 9999999.9 .OR. pdx(j) == 0.0 ) pdx(j) = pdx(j-1) |
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| 193 | IF ( pdy(j) == 9999999.9 .OR. pdy(j) == 0.0 ) pdy(j) = pdy(j-1) |
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| 194 | IF ( pdz(j) == 9999999.9 .OR. pdz(j) == 0.0 ) pdz(j) = pdz(j-1) |
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| 195 | ENDDO |
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| 196 | |
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| 197 | ! |
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| 198 | !-- For the first model run of a possible job chain initialize the |
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| 199 | !-- particles, otherwise read the particle data from file. |
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| 200 | IF ( TRIM( initializing_actions ) == 'read_restart_data' & |
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| 201 | .AND. read_particles_from_restartfile ) THEN |
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| 202 | |
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| 203 | ! |
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| 204 | !-- Read particle data from previous model run. |
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| 205 | !-- First open the input unit. |
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| 206 | IF ( myid_char == '' ) THEN |
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| 207 | OPEN ( 90, FILE='PARTICLE_RESTART_DATA_IN'//myid_char, & |
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| 208 | FORM='UNFORMATTED' ) |
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| 209 | ELSE |
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| 210 | OPEN ( 90, FILE='PARTICLE_RESTART_DATA_IN/'//myid_char, & |
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| 211 | FORM='UNFORMATTED' ) |
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| 212 | ENDIF |
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| 213 | |
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| 214 | ! |
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| 215 | !-- First compare the version numbers |
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| 216 | READ ( 90 ) version_on_file |
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| 217 | particle_binary_version = '3.0' |
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| 218 | IF ( TRIM( version_on_file ) /= TRIM( particle_binary_version ) ) THEN |
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| 219 | IF ( myid == 0 ) THEN |
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| 220 | PRINT*, '+++ init_particles: version mismatch concerning data ', & |
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| 221 | 'from prior run' |
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| 222 | PRINT*, ' version on file = "', TRIM( version_on_file ),& |
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| 223 | '"' |
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| 224 | PRINT*, ' version in program = "', & |
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| 225 | TRIM( particle_binary_version ), '"' |
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| 226 | ENDIF |
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| 227 | CALL local_stop |
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| 228 | ENDIF |
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| 229 | |
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| 230 | ! |
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| 231 | !-- Read some particle parameters and the size of the particle arrays, |
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| 232 | !-- allocate them and read their contents. |
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| 233 | READ ( 90 ) bc_par_b, bc_par_lr, bc_par_ns, bc_par_t, & |
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| 234 | maximum_number_of_particles, maximum_number_of_tailpoints, & |
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| 235 | maximum_number_of_tails, number_of_initial_particles, & |
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| 236 | number_of_particles, number_of_particle_groups, & |
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| 237 | number_of_tails, particle_groups, time_prel, & |
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| 238 | time_write_particle_data, uniform_particles |
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| 239 | |
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| 240 | IF ( number_of_initial_particles /= 0 ) THEN |
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| 241 | ALLOCATE( initial_particles(1:number_of_initial_particles) ) |
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| 242 | READ ( 90 ) initial_particles |
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| 243 | ENDIF |
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| 244 | |
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| 245 | ALLOCATE( prt_count(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), & |
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| 246 | prt_start_index(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), & |
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| 247 | particle_mask(maximum_number_of_particles), & |
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| 248 | particles(maximum_number_of_particles) ) |
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| 249 | |
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| 250 | READ ( 90 ) prt_count, prt_start_index |
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| 251 | READ ( 90 ) particles |
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| 252 | |
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| 253 | IF ( use_particle_tails ) THEN |
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| 254 | ALLOCATE( particle_tail_coordinates(maximum_number_of_tailpoints,5, & |
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| 255 | maximum_number_of_tails), & |
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| 256 | new_tail_id(maximum_number_of_tails), & |
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| 257 | tail_mask(maximum_number_of_tails) ) |
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| 258 | READ ( 90 ) particle_tail_coordinates |
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| 259 | ENDIF |
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| 260 | |
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| 261 | CLOSE ( 90 ) |
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| 262 | |
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| 263 | ELSE |
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| 264 | |
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| 265 | ! |
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| 266 | !-- Allocate particle arrays and set attributes of the initial set of |
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| 267 | !-- particles, which can be also periodically released at later times. |
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| 268 | !-- Also allocate array for particle tail coordinates, if needed. |
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| 269 | ALLOCATE( prt_count(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), & |
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| 270 | prt_start_index(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), & |
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| 271 | particle_mask(maximum_number_of_particles), & |
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| 272 | particles(maximum_number_of_particles) ) |
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| 273 | |
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| 274 | ! |
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| 275 | !-- Initialize all particles with dummy values (otherwise errors may |
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| 276 | !-- occur within restart runs). The reason for this is still not clear |
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| 277 | !-- and may be presumably caused by errors in the respective user-interface. |
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| 278 | 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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| 279 | 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, & |
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| 280 | 0, 0, 0, 0 ) |
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| 281 | particle_groups = particle_groups_type( 0.0, 0.0, 0.0, 0.0 ) |
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| 282 | |
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| 283 | ! |
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| 284 | !-- Set the default particle size used for dvrp plots |
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| 285 | IF ( dvrp_psize == 9999999.9 ) dvrp_psize = 0.2 * dx |
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| 286 | |
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| 287 | ! |
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| 288 | !-- Set values for the density ratio and radius for all particle |
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| 289 | !-- groups, if necessary |
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| 290 | IF ( density_ratio(1) == 9999999.9 ) density_ratio(1) = 0.0 |
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| 291 | IF ( radius(1) == 9999999.9 ) radius(1) = 0.0 |
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| 292 | DO i = 2, number_of_particle_groups |
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| 293 | IF ( density_ratio(i) == 9999999.9 ) THEN |
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| 294 | density_ratio(i) = density_ratio(i-1) |
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| 295 | ENDIF |
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| 296 | IF ( radius(i) == 9999999.9 ) radius(i) = radius(i-1) |
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| 297 | ENDDO |
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| 298 | |
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| 299 | DO i = 1, number_of_particle_groups |
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| 300 | IF ( density_ratio(i) /= 0.0 .AND. radius(i) == 0 ) THEN |
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| 301 | IF ( myid == 0 ) THEN |
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| 302 | PRINT*, '+++ init_particles: particle group #', i, 'has a', & |
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| 303 | 'density ratio /= 0 but radius = 0' |
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| 304 | ENDIF |
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| 305 | CALL local_stop |
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| 306 | ENDIF |
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| 307 | particle_groups(i)%density_ratio = density_ratio(i) |
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| 308 | particle_groups(i)%radius = radius(i) |
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| 309 | ENDDO |
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| 310 | |
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| 311 | ! |
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| 312 | !-- Calculate particle positions and store particle attributes, if |
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| 313 | !-- particle is situated on this PE |
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| 314 | n = 0 |
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| 315 | |
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| 316 | DO i = 1, number_of_particle_groups |
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| 317 | |
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| 318 | pos_z = psb(i) |
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| 319 | |
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| 320 | DO WHILE ( pos_z <= pst(i) ) |
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| 321 | |
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| 322 | pos_y = pss(i) |
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| 323 | |
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| 324 | DO WHILE ( pos_y <= psn(i) ) |
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| 325 | |
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| 326 | IF ( pos_y >= ( nys - 0.5 ) * dy .AND. & |
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| 327 | pos_y < ( nyn + 0.5 ) * dy ) THEN |
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| 328 | |
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| 329 | pos_x = psl(i) |
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| 330 | |
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| 331 | DO WHILE ( pos_x <= psr(i) ) |
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| 332 | |
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| 333 | IF ( pos_x >= ( nxl - 0.5 ) * dx .AND. & |
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| 334 | pos_x < ( nxr + 0.5 ) * dx ) THEN |
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| 335 | |
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| 336 | DO j = 1, particles_per_point |
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| 337 | |
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| 338 | n = n + 1 |
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| 339 | IF ( n > maximum_number_of_particles ) THEN |
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| 340 | PRINT*,'+++ init_particles: number of initial', & |
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| 341 | ' particles (', n, ') exceeds' |
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| 342 | PRINT*,' maximum_number_of_particles (', & |
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| 343 | maximum_number_of_particles, ') on PE ', & |
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| 344 | myid |
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| 345 | #if defined( __parallel ) |
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| 346 | CALL MPI_ABORT( comm2d, 9999, ierr ) |
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| 347 | #else |
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| 348 | CALL local_stop |
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| 349 | #endif |
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| 350 | ENDIF |
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| 351 | particles(n)%x = pos_x |
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| 352 | particles(n)%y = pos_y |
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| 353 | particles(n)%z = pos_z |
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| 354 | particles(n)%age = 0.0 |
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| 355 | particles(n)%dt_sum = 0.0 |
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| 356 | particles(n)%dvrp_psize = dvrp_psize |
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| 357 | particles(n)%e_m = 0.0 |
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| 358 | particles(n)%speed_x = 0.0 |
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| 359 | particles(n)%speed_x_sgs = 0.0 |
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| 360 | particles(n)%speed_y = 0.0 |
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| 361 | particles(n)%speed_y_sgs = 0.0 |
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| 362 | particles(n)%speed_z = 0.0 |
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| 363 | particles(n)%speed_z_sgs = 0.0 |
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| 364 | particles(n)%origin_x = pos_x |
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| 365 | particles(n)%origin_y = pos_y |
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| 366 | particles(n)%origin_z = pos_z |
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| 367 | particles(n)%radius = particle_groups(i)%radius |
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| 368 | particles(n)%weight_factor =initial_weighting_factor |
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| 369 | particles(n)%color = 1 |
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| 370 | particles(n)%group = i |
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| 371 | particles(n)%tailpoints = 0 |
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| 372 | IF ( use_particle_tails .AND. & |
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| 373 | MOD( n, skip_particles_for_tail ) == 0 ) THEN |
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| 374 | number_of_tails = number_of_tails + 1 |
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| 375 | ! |
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| 376 | !-- This is a temporary provisional setting (see |
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| 377 | !-- further below!) |
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| 378 | particles(n)%tail_id = number_of_tails |
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| 379 | ELSE |
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| 380 | particles(n)%tail_id = 0 |
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| 381 | ENDIF |
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| 382 | |
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| 383 | ENDDO |
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| 384 | |
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| 385 | ENDIF |
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| 386 | |
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| 387 | pos_x = pos_x + pdx(i) |
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| 388 | |
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| 389 | ENDDO |
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| 390 | |
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| 391 | ENDIF |
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| 392 | |
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| 393 | pos_y = pos_y + pdy(i) |
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| 394 | |
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| 395 | ENDDO |
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| 396 | |
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| 397 | pos_z = pos_z + pdz(i) |
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| 398 | |
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| 399 | ENDDO |
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| 400 | |
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| 401 | ENDDO |
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| 402 | |
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| 403 | number_of_initial_particles = n |
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| 404 | number_of_particles = n |
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| 405 | |
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| 406 | ! |
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| 407 | !-- Calculate the number of particles and tails of the total domain |
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| 408 | #if defined( __parallel ) |
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| 409 | CALL MPI_ALLREDUCE( number_of_particles, total_number_of_particles, 1, & |
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| 410 | MPI_REAL, MPI_SUM, comm2d, ierr ) |
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| 411 | CALL MPI_ALLREDUCE( number_of_tails, total_number_of_tails, 1, & |
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| 412 | MPI_REAL, MPI_SUM, comm2d, ierr ) |
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| 413 | #else |
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| 414 | total_number_of_particles = number_of_particles |
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| 415 | total_number_of_tails = number_of_tails |
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| 416 | #endif |
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| 417 | |
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| 418 | ! |
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| 419 | !-- Set a seed value for the random number generator to be exclusively |
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| 420 | !-- used for the particle code. The generated random numbers should be |
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| 421 | !-- different on the different PEs. |
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| 422 | iran_part = iran_part + myid |
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| 423 | |
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| 424 | ! |
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| 425 | !-- User modification of initial particles |
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| 426 | CALL user_init_particles |
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| 427 | |
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| 428 | ! |
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| 429 | !-- Store the initial set of particles for release at later times |
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| 430 | IF ( number_of_initial_particles /= 0 ) THEN |
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| 431 | ALLOCATE( initial_particles(1:number_of_initial_particles) ) |
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| 432 | initial_particles(1:number_of_initial_particles) = & |
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| 433 | particles(1:number_of_initial_particles) |
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| 434 | ENDIF |
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| 435 | |
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| 436 | ! |
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| 437 | !-- Add random fluctuation to particle positions |
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| 438 | IF ( random_start_position ) THEN |
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| 439 | |
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| 440 | iran = iran + myid ! Random positions should be different on |
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| 441 | ! different PEs |
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| 442 | |
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| 443 | DO n = 1, number_of_initial_particles |
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| 444 | IF ( psl(particles(n)%group) /= psr(particles(n)%group) ) THEN |
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| 445 | particles(n)%x = particles(n)%x + & |
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| 446 | ( random_function( iran ) - 0.5 ) * & |
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| 447 | pdx(particles(n)%group) |
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| 448 | IF ( particles(n)%x <= ( nxl - 0.5 ) * dx ) THEN |
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| 449 | particles(n)%x = ( nxl - 0.4999999999 ) * dx |
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| 450 | ELSEIF ( particles(n)%x >= ( nxr + 0.5 ) * dx ) THEN |
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| 451 | particles(n)%x = ( nxr + 0.4999999999 ) * dx |
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| 452 | ENDIF |
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| 453 | ENDIF |
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| 454 | IF ( pss(particles(n)%group) /= psn(particles(n)%group) ) THEN |
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| 455 | particles(n)%y = particles(n)%y + & |
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| 456 | ( random_function( iran ) - 0.5 ) * & |
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| 457 | pdy(particles(n)%group) |
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| 458 | IF ( particles(n)%y <= ( nys - 0.5 ) * dy ) THEN |
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| 459 | particles(n)%y = ( nys - 0.4999999999 ) * dy |
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| 460 | ELSEIF ( particles(n)%y >= ( nyn + 0.5 ) * dy ) THEN |
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| 461 | particles(n)%y = ( nyn + 0.4999999999 ) * dy |
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| 462 | ENDIF |
|---|
| 463 | ENDIF |
|---|
| 464 | IF ( psb(particles(n)%group) /= pst(particles(n)%group) ) THEN |
|---|
| 465 | particles(n)%z = particles(n)%z + & |
|---|
| 466 | ( random_function( iran ) - 0.5 ) * & |
|---|
| 467 | pdz(particles(n)%group) |
|---|
| 468 | ENDIF |
|---|
| 469 | ENDDO |
|---|
| 470 | ENDIF |
|---|
| 471 | |
|---|
| 472 | ! |
|---|
| 473 | !-- Sort particles in the sequence the gridboxes are stored in the memory |
|---|
| 474 | CALL sort_particles |
|---|
| 475 | |
|---|
| 476 | ! |
|---|
| 477 | !-- Open file for statistical informations about particle conditions |
|---|
| 478 | IF ( write_particle_statistics ) THEN |
|---|
| 479 | CALL check_open( 80 ) |
|---|
| 480 | WRITE ( 80, 8000 ) current_timestep_number, simulated_time, & |
|---|
| 481 | number_of_initial_particles, & |
|---|
| 482 | maximum_number_of_particles |
|---|
| 483 | CALL close_file( 80 ) |
|---|
| 484 | ENDIF |
|---|
| 485 | |
|---|
| 486 | ! |
|---|
| 487 | !-- Check if particles are really uniform in color and radius (dvrp_size) |
|---|
| 488 | !-- (uniform_particles is preset TRUE) |
|---|
| 489 | IF ( uniform_particles ) THEN |
|---|
| 490 | IF ( number_of_initial_particles == 0 ) THEN |
|---|
| 491 | uniform_particles_l = .TRUE. |
|---|
| 492 | ELSE |
|---|
| 493 | n = number_of_initial_particles |
|---|
| 494 | IF ( MINVAL( particles(1:n)%dvrp_psize ) == & |
|---|
| 495 | MAXVAL( particles(1:n)%dvrp_psize ) .AND. & |
|---|
| 496 | MINVAL( particles(1:n)%color ) == & |
|---|
| 497 | MAXVAL( particles(1:n)%color ) ) THEN |
|---|
| 498 | uniform_particles_l = .TRUE. |
|---|
| 499 | ELSE |
|---|
| 500 | uniform_particles_l = .FALSE. |
|---|
| 501 | ENDIF |
|---|
| 502 | ENDIF |
|---|
| 503 | |
|---|
| 504 | #if defined( __parallel ) |
|---|
| 505 | CALL MPI_ALLREDUCE( uniform_particles_l, uniform_particles, 1, & |
|---|
| 506 | MPI_LOGICAL, MPI_LAND, comm2d, ierr ) |
|---|
| 507 | #else |
|---|
| 508 | uniform_particles = uniform_particles_l |
|---|
| 509 | #endif |
|---|
| 510 | |
|---|
| 511 | ENDIF |
|---|
| 512 | |
|---|
| 513 | ! |
|---|
| 514 | !-- Set the beginning of the particle tails and their age |
|---|
| 515 | IF ( use_particle_tails ) THEN |
|---|
| 516 | ! |
|---|
| 517 | !-- Choose the maximum number of tails significantly larger than the |
|---|
| 518 | !-- one initially required |
|---|
| 519 | factor = 10.0 |
|---|
| 520 | value = number_of_tails |
|---|
| 521 | DO WHILE ( value / 10.0 >= 1.0 ) |
|---|
| 522 | factor = factor * 10.0 |
|---|
| 523 | value = value / 10.0 |
|---|
| 524 | ENDDO |
|---|
| 525 | maximum_number_of_tails = factor * INT( value ) |
|---|
| 526 | |
|---|
| 527 | ALLOCATE( particle_tail_coordinates(maximum_number_of_tailpoints,5, & |
|---|
| 528 | maximum_number_of_tails), & |
|---|
| 529 | new_tail_id(maximum_number_of_tails), & |
|---|
| 530 | tail_mask(maximum_number_of_tails) ) |
|---|
| 531 | |
|---|
| 532 | particle_tail_coordinates = 0.0 |
|---|
| 533 | minimum_tailpoint_distance = minimum_tailpoint_distance**2 |
|---|
| 534 | number_of_initial_tails = number_of_tails |
|---|
| 535 | |
|---|
| 536 | nn = 0 |
|---|
| 537 | DO n = 1, number_of_particles |
|---|
| 538 | ! |
|---|
| 539 | !-- Only for those particles marked above with a provisional tail_id |
|---|
| 540 | !-- tails will be created. Particles now get their final tail_id. |
|---|
| 541 | IF ( particles(n)%tail_id /= 0 ) THEN |
|---|
| 542 | |
|---|
| 543 | nn = nn + 1 |
|---|
| 544 | particles(n)%tail_id = nn |
|---|
| 545 | |
|---|
| 546 | particle_tail_coordinates(1,1,nn) = particles(n)%x |
|---|
| 547 | particle_tail_coordinates(1,2,nn) = particles(n)%y |
|---|
| 548 | particle_tail_coordinates(1,3,nn) = particles(n)%z |
|---|
| 549 | particle_tail_coordinates(1,4,nn) = particles(n)%color |
|---|
| 550 | particles(n)%tailpoints = 1 |
|---|
| 551 | IF ( minimum_tailpoint_distance /= 0.0 ) THEN |
|---|
| 552 | particle_tail_coordinates(2,1,nn) = particles(n)%x |
|---|
| 553 | particle_tail_coordinates(2,2,nn) = particles(n)%y |
|---|
| 554 | particle_tail_coordinates(2,3,nn) = particles(n)%z |
|---|
| 555 | particle_tail_coordinates(2,4,nn) = particles(n)%color |
|---|
| 556 | particle_tail_coordinates(1:2,5,nn) = 0.0 |
|---|
| 557 | particles(n)%tailpoints = 2 |
|---|
| 558 | ENDIF |
|---|
| 559 | |
|---|
| 560 | ENDIF |
|---|
| 561 | ENDDO |
|---|
| 562 | ENDIF |
|---|
| 563 | |
|---|
| 564 | ! |
|---|
| 565 | !-- Plot initial positions of particles (only if particle advection is |
|---|
| 566 | !-- switched on from the beginning of the simulation (t=0)) |
|---|
| 567 | IF ( particle_advection_start == 0.0 ) CALL data_output_dvrp |
|---|
| 568 | |
|---|
| 569 | ENDIF |
|---|
| 570 | |
|---|
| 571 | ! |
|---|
| 572 | !-- Check boundary condition and set internal variables |
|---|
| 573 | SELECT CASE ( bc_par_b ) |
|---|
| 574 | |
|---|
| 575 | CASE ( 'absorb' ) |
|---|
| 576 | ibc_par_b = 1 |
|---|
| 577 | |
|---|
| 578 | CASE ( 'reflect' ) |
|---|
| 579 | ibc_par_b = 2 |
|---|
| 580 | |
|---|
| 581 | CASE DEFAULT |
|---|
| 582 | IF ( myid == 0 ) THEN |
|---|
| 583 | PRINT*,'+++ init_particles: unknown boundary condition ', & |
|---|
| 584 | 'bc_par_b = "', TRIM( bc_par_b ), '"' |
|---|
| 585 | ENDIF |
|---|
| 586 | CALL local_stop |
|---|
| 587 | |
|---|
| 588 | END SELECT |
|---|
| 589 | SELECT CASE ( bc_par_t ) |
|---|
| 590 | |
|---|
| 591 | CASE ( 'absorb' ) |
|---|
| 592 | ibc_par_t = 1 |
|---|
| 593 | |
|---|
| 594 | CASE ( 'reflect' ) |
|---|
| 595 | ibc_par_t = 2 |
|---|
| 596 | |
|---|
| 597 | CASE DEFAULT |
|---|
| 598 | IF ( myid == 0 ) THEN |
|---|
| 599 | PRINT*,'+++ init_particles: unknown boundary condition ', & |
|---|
| 600 | 'bc_par_t = "', TRIM( bc_par_t ), '"' |
|---|
| 601 | ENDIF |
|---|
| 602 | CALL local_stop |
|---|
| 603 | |
|---|
| 604 | END SELECT |
|---|
| 605 | SELECT CASE ( bc_par_lr ) |
|---|
| 606 | |
|---|
| 607 | CASE ( 'cyclic' ) |
|---|
| 608 | ibc_par_lr = 0 |
|---|
| 609 | |
|---|
| 610 | CASE ( 'absorb' ) |
|---|
| 611 | ibc_par_lr = 1 |
|---|
| 612 | |
|---|
| 613 | CASE ( 'reflect' ) |
|---|
| 614 | ibc_par_lr = 2 |
|---|
| 615 | |
|---|
| 616 | CASE DEFAULT |
|---|
| 617 | IF ( myid == 0 ) THEN |
|---|
| 618 | PRINT*,'+++ init_particles: unknown boundary condition ', & |
|---|
| 619 | 'bc_par_lr = "', TRIM( bc_par_lr ), '"' |
|---|
| 620 | ENDIF |
|---|
| 621 | CALL local_stop |
|---|
| 622 | |
|---|
| 623 | END SELECT |
|---|
| 624 | SELECT CASE ( bc_par_ns ) |
|---|
| 625 | |
|---|
| 626 | CASE ( 'cyclic' ) |
|---|
| 627 | ibc_par_ns = 0 |
|---|
| 628 | |
|---|
| 629 | CASE ( 'absorb' ) |
|---|
| 630 | ibc_par_ns = 1 |
|---|
| 631 | |
|---|
| 632 | CASE ( 'reflect' ) |
|---|
| 633 | ibc_par_ns = 2 |
|---|
| 634 | |
|---|
| 635 | CASE DEFAULT |
|---|
| 636 | IF ( myid == 0 ) THEN |
|---|
| 637 | PRINT*,'+++ init_particles: unknown boundary condition ', & |
|---|
| 638 | 'bc_par_ns = "', TRIM( bc_par_ns ), '"' |
|---|
| 639 | ENDIF |
|---|
| 640 | CALL local_stop |
|---|
| 641 | |
|---|
| 642 | END SELECT |
|---|
| 643 | ! |
|---|
| 644 | !-- Formats |
|---|
| 645 | 8000 FORMAT (I6,1X,F7.2,4X,I6,71X,I6) |
|---|
| 646 | |
|---|
| 647 | #endif |
|---|
| 648 | END SUBROUTINE init_particles |
|---|
