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/*
This file is part of LPIC++, a particle-in-cell code for
simulating the interaction of laser light with plasma.
Copyright (C) 1994-1997 Roland Lichters
LPIC++ is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <propagate.h>
//////////////////////////////////////////////////////////////////////////////////////////
propagate::propagate(parameter &p, domain &grid)
: input(p),
stk(p),
rf()
{
sprintf( errname, "%s/error-%d", p.path, p.domain_number );
static error_handler bob("propagate::Constructor",errname);
Gamma = p.Gamma;
dx = grid.dx;
idx = 1.0/dx;
dt = dx / Gamma; // <--------------------- LT -----------------------
domain_number = p.domain_number;
n_domains = input.n_domains;
start_time = input.start_time;
stop_time = input.stop_time;
if( input.Q_restart == 0 ) start_time = input.start_time;
else{
char fname[ filename_size ];
sprintf( fname, "%s/%s-%d-data1", p.path, input.restart_file, p.domain_number );
rf.openinput(fname);
start_time = atof( rf.getinput( "time" ) );
rf.closeinput();
}
ofstream outfile;
outfile.open(p.outname,ios::app);
outfile << "propagate constructor" << endl;
outfile << "------------------------------------------------------------------" << endl;
outfile << "Gamma : " << Gamma << endl;
outfile << "dx : " << dx << endl;
outfile << "idx : " << idx << endl;
outfile << "dt : " << dt << endl;
outfile << "domain : " << domain_number << endl << endl << endl;
outfile.close();
}
//////////////////////////////////////////////////////////////////////////////////////////
input_propagate::input_propagate( parameter &p )
: rf()
{
sprintf( errname, "%s/error-%d", p.path, p.domain_number );
static error_handler bob("input_propagate::Constructor",errname);
rf.openinput( p.input_file_name );
start_time = atoi( rf.setget( "&propagate", "prop_start" ) );
stop_time = atoi( rf.setget( "&propagate", "prop_stop" ) );
n_domains = atoi( rf.setget( "¶llel", "N_domains" ) );
Q_restart = atoi( rf.setget( "&restart", "Q" ) );
strcpy( restart_file, rf.setget( "&restart", "file" ) );
rf.closeinput();
bob.message( "parameter read" );
if (p.domain_number==1) save(p);
}
//////////////////////////////////////////////////////////////////////////////////////////
void input_propagate::save( parameter &p )
{
static error_handler bob("input_propagate::save",errname);
ofstream outfile;
outfile.open(p.outname,ios::app);
outfile << "propagate" << endl;
outfile << "------------------------------------------------------------------" << endl;
outfile << "Q_restart : " << Q_restart << endl;
outfile << "restart_file : " << restart_file << endl;
outfile << "prop_start : " << start_time << endl;
outfile << "prop_stop : " << stop_time << endl;
outfile << "N_domains : " << n_domains << endl << endl << endl;
outfile.close();
bob.message("parameter written");
}
//////////////////////////////////////////////////////////////////////////////////////////
void propagate::loop(parameter &p, box &sim, pulse &laser_front, pulse &laser_rear,
diagnostic &diag )
// In case of several domains:
// >> Usage of "sim.talk.current_1" and "sim.talk.current_2" leads to EXACTLY
// the same ordering of operations during adding the current contributions
// for any cell as in the case of only one domain. This leads to identical
// results for one or several domain, respectively, even in chaotic situations.
// This version may be used to check new network routines, but does NOT
// increase the job's speed, since a specified task propagates its particles
// after its parent task has finished.
// For this version, #DEFINE SLOW in header file common.h!
// >> Usage of "sim.talk.current" instead leads to a slightly DIFFERENT ordering
// of operations during adding the current contributions for the buffer cells.
// Although PHYSICALLY COMPLETELY EQUIVALENT to the case of only one domain,
// slightly different roundoff errors in subtracting large numbers can lead
// to DIFFERENT simulation results in chaotic situations compared to the
// case of one domain.
// For this version #UNDEF SLOW in header file common.h!
{
static error_handler bob("propagate::loop",errname);
//////////////////////////////////// clocks ////////////////////////////////////////////
uhr zeit(p,"total" ); //
uhr zeit_particles(p,"particles" ); //
uhr zeit_fields(p,"fields" ); //
uhr zeit_diagnostic(p,"diagnostic"); //
////////////////////////////////////////////////////////////////////////////////////////
zeit.start();
for( time = start_time; time <= stop_time + dt; time += dt )
{
sim.restart_save( diag, time, p, zeit, zeit_particles,
zeit_fields, zeit_diagnostic );
sim.count_restart();
clear_grid( sim.grid );
#ifdef LPIC_PARALLEL
#ifdef SLOW // send/recieve current contributions and copies
sim.talk.current_1(diag.public_time_steps, &(sim.grid) ); // SLOW
#endif
#endif
zeit_particles.start();
particles( sim.grid ); // accelerate and move
reflect_particles( sim.grid ); // reflect particles at box boundaries
zeit_particles.stop_and_add();
#ifdef LPIC_PARALLEL
#ifdef SLOW
sim.talk.current_2(diag.public_time_steps, &(sim.grid) ); // SLOW
#else // send/recieve current contributions and copies
sim.talk.current( diag.public_time_steps, &(sim.grid) ); // FAST
#endif
sim.talk.particles( diag.public_time_steps, &(sim.grid) );
// send/recieve particles to/from
// neighbour domains
sim.talk.density( diag.public_time_steps, &(sim.grid) );
// send/recieve density contributions
#endif
zeit_fields.start();
fields( sim.grid, laser_front, laser_rear );
// propagate fields
zeit_fields.stop_and_add();
#ifdef LPIC_PARALLEL
sim.talk.field( diag.public_time_steps, &(sim.grid) );
// send/recieve field copies to/from
// neighbour domains
sim.reorganize( sim.grid, sim.talk, time );
// reorganize box
sim.count_reorganize(); // reorganize counter
#endif
zeit_diagnostic.start();
diag.out( time, &(sim.grid), p ); // diagnostics
diag.count(); // diagnostic counter
zeit_diagnostic.stop_and_add();
zeit.add(); // update clock
}
zeit.stop_and_add();
zeit_particles.seconds_cpu();
zeit_fields.seconds_cpu();
zeit_diagnostic.seconds_cpu();
zeit.seconds_cpu();
if( input.Q_restart == 0 ) zeit.seconds_sys();
}
//////////////////////////////////////////////////////////////////////////////////////////
void propagate::clear_grid( domain &grid )
{
static error_handler bob("propagate::clear_grid",errname);
struct cell *cell;
for( cell=grid.Lbuf; cell!=grid.dummy; cell=cell->next )
{
cell->charge = 0;
cell->dens[0] = 0;
cell->dens[1] = 0;
cell->jx = 0;
cell->jy = 0;
cell->jz = 0;
}
}
//////////////////////////////////////////////////////////////////////////////////////////
//EOF
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