source: palm/trunk/SOURCE/palm.f90 @ 850

Last change on this file since 850 was 850, checked in by raasch, 9 years ago

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1 PROGRAM palm
2
3!------------------------------------------------------------------------------!
4! Current revisions:
5! -----------------
6!
7!
8! Former revisions:
9! -----------------
10! $Id: palm.f90 850 2012-03-15 12:09:25Z raasch $
11!
12! 849 2012-03-15 10:35:09Z raasch
13! write_particles renamed lpm_write_restart_file
14!
15! 759 2011-09-15 13:58:31Z raasch
16! Splitting of parallel I/O, cpu measurement for write_3d_binary and opening
17! of unit 14 moved to here
18!
19! 495 2010-03-02 00:40:15Z raasch
20! Particle data for restart runs are only written if write_binary=.T..
21!
22! 215 2008-11-18 09:54:31Z raasch
23! Initialization of coupled runs modified for MPI-1 and moved to external
24! subroutine init_coupling
25!
26! 197 2008-09-16 15:29:03Z raasch
27! Workaround for getting information about the coupling mode
28!
29! 108 2007-08-24 15:10:38Z letzel
30! Get coupling mode from environment variable, change location of debug output
31!
32! 75 2007-03-22 09:54:05Z raasch
33! __vtk directives removed, write_particles is called only in case of particle
34! advection switched on, open unit 9 for debug output,
35! setting of palm version moved from modules to here
36!
37! RCS Log replace by Id keyword, revision history cleaned up
38!
39! Revision 1.10  2006/08/04 14:53:12  raasch
40! Distibution of run description header removed, call of header moved behind
41! init_3d_model
42!
43! Revision 1.2  2001/01/25 07:15:06  raasch
44! Program name changed to PALM, module test_variables removed.
45! Initialization of dvrp logging as well as exit of dvrp moved to new
46! subroutines init_dvrp_logging and close_dvrp (file init_dvrp.f90)
47!
48! Revision 1.1  1997/07/24 11:23:35  raasch
49! Initial revision
50!
51!
52! Description:
53! ------------
54! Large-Eddy Simulation (LES) model for the convective boundary layer,
55! optimized for use on parallel machines (implementation realized using the
56! Message Passing Interface (MPI)). The model can also be run on vector machines
57! (less well optimized) and workstations. Versions for the different types of
58! machines are controlled via cpp-directives.
59! Model runs are only feasible using the ksh-script mrun.
60!------------------------------------------------------------------------------!
61
62
63    USE arrays_3d
64    USE constants
65    USE control_parameters
66    USE cpulog
67    USE dvrp_variables
68    USE grid_variables
69    USE indices
70    USE interfaces
71    USE model_1d
72    USE particle_attributes
73    USE pegrid
74    USE spectrum
75    USE statistics
76
77    IMPLICIT NONE
78
79!
80!-- Local variables
81    CHARACTER (LEN=9) ::  time_to_string
82    CHARACTER (LEN=1) ::  cdum
83    INTEGER           ::  i, run_description_header_i(80)
84
85    version = 'PALM 3.8'
86
87#if defined( __parallel )
88!
89!-- MPI initialisation. comm2d is preliminary set, because
90!-- it will be defined in init_pegrid but is used before in cpu_log.
91    CALL MPI_INIT( ierr )
92    CALL MPI_COMM_SIZE( MPI_COMM_WORLD, numprocs, ierr )
93    CALL MPI_COMM_RANK( MPI_COMM_WORLD, myid, ierr )
94    comm_palm = MPI_COMM_WORLD
95    comm2d    = MPI_COMM_WORLD
96
97!
98!-- Initialize PE topology in case of coupled runs
99    CALL init_coupling
100#endif
101
102!
103!-- Initialize measuring of the CPU-time remaining to the run
104    CALL local_tremain_ini
105
106!
107!-- Start of total CPU time measuring.
108    CALL cpu_log( log_point(1), 'total', 'start' )
109    CALL cpu_log( log_point(2), 'initialisation', 'start' )
110
111!
112!-- Open a file for debug output
113    WRITE (myid_char,'(''_'',I4.4)')  myid
114    OPEN( 9, FILE='DEBUG'//TRIM( coupling_char )//myid_char, FORM='FORMATTED' )
115
116!
117!-- Initialize dvrp logging. Also, one PE maybe split from the global
118!-- communicator for doing the dvrp output. In that case, the number of
119!-- PEs available for PALM is reduced by one and communicator comm_palm
120!-- is changed respectively.
121#if defined( __parallel )
122    CALL MPI_COMM_RANK( comm_palm, myid, ierr )
123!
124!-- TEST OUTPUT (TO BE REMOVED)
125    WRITE(9,*) '*** coupling_mode = "', TRIM( coupling_mode ), '"'
126    CALL LOCAL_FLUSH( 9 )
127    IF ( TRIM( coupling_mode ) /= 'uncoupled' )  THEN
128       PRINT*, '*** PE', myid, ' Global target PE:', target_id, &
129               TRIM( coupling_mode )
130    ENDIF
131#endif
132
133    CALL init_dvrp_logging
134
135!
136!-- Read control parameters from NAMELIST files and read environment-variables
137    CALL parin
138
139!
140!-- Determine processor topology and local array indices
141    CALL init_pegrid
142
143!
144!-- Generate grid parameters
145    CALL init_grid
146
147!
148!-- Check control parameters and deduce further quantities
149    CALL check_parameters
150
151
152!
153!-- Initialize all necessary variables
154    CALL init_3d_model
155
156!
157!-- Output of program header
158    IF ( myid == 0 )  CALL header
159
160    CALL cpu_log( log_point(2), 'initialisation', 'stop' )
161
162!
163!-- Set start time in format hh:mm:ss
164    simulated_time_chr = time_to_string( simulated_time )
165
166!
167!-- If required, output of initial arrays
168    IF ( do2d_at_begin )  THEN
169       CALL data_output_2d( 'xy', 0 )
170       CALL data_output_2d( 'xz', 0 )
171       CALL data_output_2d( 'yz', 0 )
172    ENDIF
173    IF ( do3d_at_begin )  THEN
174       CALL data_output_3d( 0 )
175    ENDIF
176
177!
178!-- Integration of the model equations using timestep-scheme
179    CALL time_integration
180
181!
182!-- If required, write binary data for restart runs
183    IF ( write_binary(1:4) == 'true' )  THEN
184
185       CALL cpu_log( log_point(22), 'write_3d_binary', 'start' )
186
187       CALL check_open( 14 )
188
189       DO  i = 0, io_blocks-1
190          IF ( i == io_group )  THEN
191!
192!--          Write flow field data
193             CALL write_3d_binary
194          ENDIF
195#if defined( __parallel )
196          CALL MPI_BARRIER( comm2d, ierr )
197#endif
198       ENDDO
199
200       CALL cpu_log( log_point(22), 'write_3d_binary', 'stop' )
201
202!
203!--    If required, write particle data
204       IF ( particle_advection )  CALL lpm_write_restart_file
205    ENDIF
206
207!
208!-- If required, repeat output of header including the required CPU-time
209    IF ( myid == 0 )  CALL header
210!
211!-- If required, final user-defined actions, and
212!-- last actions on the open files and close files. Unit 14 was opened
213!-- in write_3d_binary but it is closed here, to allow writing on this
214!-- unit in routine user_last_actions.
215    CALL cpu_log( log_point(4), 'last actions', 'start' )
216    DO  i = 0, io_blocks-1
217       IF ( i == io_group )  THEN
218          CALL user_last_actions
219          IF ( write_binary(1:4) == 'true' )  CALL close_file( 14 )
220       ENDIF
221#if defined( __parallel )
222       CALL MPI_BARRIER( comm2d, ierr )
223#endif
224    ENDDO
225    CALL close_file( 0 )
226    CALL close_dvrp
227    CALL cpu_log( log_point(4), 'last actions', 'stop' )
228
229#if defined( __mpi2 )
230!
231!-- Test exchange via intercommunicator in case of a MPI-2 coupling
232    IF ( coupling_mode == 'atmosphere_to_ocean' )  THEN
233       i = 12345 + myid
234       CALL MPI_SEND( i, 1, MPI_INTEGER, myid, 11, comm_inter, ierr )
235    ELSEIF ( coupling_mode == 'ocean_to_atmosphere' )  THEN
236       CALL MPI_RECV( i, 1, MPI_INTEGER, myid, 11, comm_inter, status, ierr )
237       PRINT*, '### myid: ', myid, '   received from atmosphere:  i = ', i
238    ENDIF
239#endif
240
241!
242!-- Take final CPU-time for CPU-time analysis
243    CALL cpu_log( log_point(1), 'total', 'stop' )
244    CALL cpu_statistics
245
246#if defined( __parallel )
247    CALL MPI_FINALIZE( ierr )
248#endif
249
250 END PROGRAM palm
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