/home66/gary/public_html/cloudy/c08_branch/source/conv_itercheck.cpp

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/* This file is part of Cloudy and is copyright (C)1978-2008 by Gary J. Ferland and
 * others.  For conditions of distribution and use see copyright notice in license.txt */
/*ConvIterCheck check whether model has converged or whether more iterations
 * are needed - implements the iter to converg comnd */
#include "cddefines.h"
#include "taulines.h"
#include "iso.h"
#include "phycon.h"
#include "mole.h"
#include "elementnames.h"
#include "dynamics.h"
#include "stopcalc.h"
#include "dense.h"
#include "iterations.h"
#include "colden.h"
#include "punch.h"
#include "rt.h"
#include "conv.h"

/*ConvIterCheck check whether model has converged or whether more iterations
 * are needed - implements the iterate to convergence command */
void ConvIterCheck( void )
{
        bool lgConverged;
        long int nelem, 
                i,
                ipISO,
                ipHi, ipLo;

        DEBUG_ENTRY( "ConvIterCheck()" );

        /* =======================================================================*/
        /* this is an option to keep iterating until it converges
         * iterate to convergence option
         * autocv is percentage difference in optical depths allowed,
         * =0.20 in block data
         * checking on Ly and Balmer lines */
        /*>>chng 04 oct 19, promote loop to do all iso-electronic series */
        lgConverged = true;
        strcpy( conv.chNotConverged, "Converged!" );
        if( iteration > 1 && conv.lgAutoIt )
        {
                for( ipISO=ipH_LIKE; ipISO<NISO; ++ipISO )
                {
                        for( nelem=ipISO; nelem < LIMELM; nelem++ )
                        {
                                if( dense.lgElmtOn[nelem] )
                                {
                                        /* now check if major subordinate line is converged - for H-like this will
                                         * be Ha, and for He-like, the 23P - 23S transition - this will not work for
                                         * NISO > 2 so must check against this */
                                        if(ipISO==ipH_LIKE )
                                        {
                                                ipHi = ipH3p;
                                                ipLo = ipH2s;
                                        }
                                        else if( ipISO==ipHE_LIKE )
                                        {
                                                ipHi = ipHe2p3P2;
                                                ipLo = ipHe2s3S;
                                        }
                                        else
                                                /* fails when NISO increased, add more sequences */
                                                TotalInsanity();

                                        /* check both H-alpha and Ly-alpha for all species - 
                                         * only if Balmer lines thick 
                                         * so check if Ha optical depth significant */
                                        if( Transitions[ipISO][nelem][ipHi][ipLo].Emis->TauIn > 0.5 )
                                        {
                                                /* test if Lya converged, nLyaLevel is upper level of Lya for iso seq */
                                                if( fabs(Transitions[ipISO][nelem][iso.nLyaLevel[ipISO]][0].Emis->TauTot -
                                                         Transitions[ipISO][nelem][iso.nLyaLevel[ipISO]][0].Emis->TauIn*rt.DoubleTau) > 
                                                    conv.autocv*fabs(Transitions[ipISO][nelem][iso.nLyaLevel[ipISO]][0].Emis->TauIn*rt.DoubleTau) )
                                                {
                                                        /* not converged to within AUTOCV, normally 15 percent */
                                                        lgConverged = false;

                                                        /* for iterate to convergence, print reason why it was not converged 
                                                        * on 3rd and higher iterations */
                                                        sprintf( conv.chNotConverged, "%s-like Lya",elementnames.chElementSym[ipISO] );

                                                        if( punch.lgPunConv )
                                                        {
                                                                fprintf( punch.ipPunConv, " %s-like Lya thick, "
                                                                        "nelem= %s iteration %li old %.3e new %.3e \n",
                                                                        elementnames.chElementSym[ipISO] ,
                                                                        elementnames.chElementSym[nelem], 
                                                                        iteration,
                                                                        Transitions[ipISO][nelem][iso.nLyaLevel[ipISO]][0].Emis->TauTot ,
                                                                        Transitions[ipISO][nelem][iso.nLyaLevel[ipISO]][0].Emis->TauIn);
                                                        }
                                                }

                                                if( fabs(Transitions[ipISO][nelem][ipHi][ipLo].Emis->TauTot -
                                                         Transitions[ipISO][nelem][ipHi][ipLo].Emis->TauIn*rt.DoubleTau) >
                                                    conv.autocv*fabs(Transitions[ipISO][nelem][ipHi][ipLo].Emis->TauIn*rt.DoubleTau) )
                                                {
                                                        /* not converged to within AUTOCV, normally 15 percent */
                                                        lgConverged = false;

                                                        /* for iterate to convergence, print reason why it was not converged 
                                                        * on 3rd and higher iterations */
                                                        sprintf( conv.chNotConverged, "%s-like subord",elementnames.chElementSym[ipISO] );

                                                        if( punch.lgPunConv )
                                                        {
                                                                fprintf( punch.ipPunConv, " %s-like subord, nelem= %s iteration %li old %.3e new %.3e \n" ,
                                                                        elementnames.chElementSym[ipISO],
                                                                        elementnames.chElementSym[nelem], 
                                                                        iteration,
                                                                        Transitions[ipISO][nelem][ipHi][ipLo].Emis->TauTot ,
                                                                        Transitions[ipISO][nelem][ipHi][ipLo].Emis->TauIn       );
                                                        }
                                                }
                                        }
                                }
                        }
                }

                /* >>chng 03 sep 07, add this test */
                /* check on changes in major column densities */
                for( i=0; i<NCOLD; ++i )
                {
                        /* was the species column density significant relative to
                         * the total H column density, and was its abundance changing? */
                        if( colden.colden[i]/colden.colden[ipCOL_HTOT] > 1e-5 &&
                            fabs(colden.colden_old[i]-colden.colden[i]) > conv.autocv*colden.colden[i] )
                        {
                                /* not converged to within conv.autocv, normally 20 percent */
                                lgConverged = false;

                                /* for iterate to convergence, print reason why it was not converged 
                                 * on 3rd and higher iterations */
                                strcpy( conv.chNotConverged, "H mole col" );

                                if( punch.lgPunConv )
                                {
                                        fprintf( punch.ipPunConv, " H mole col species %li iteration %li old %.2e new %.2e H col den %.2e\n",
                                                i,iteration,
                                                colden.colden_old[i],
                                                colden.colden[i],
                                                colden.colden[ipCOL_HTOT] );
                                }
                        }
                }

                /* >>chng 03 sep 07, add this test */
                /* check on changes in major column densities */
                for( i=0; i<mole.num_comole_calc; ++i )
                {
                        if(COmole[i]->n_nuclei == 1)
                                continue;

                        /* was the species abundance and changing? */
                        if( COmole[i]->hevcol/colden.colden[ipCOL_HTOT] > 1e-5 &&
                            fabs(COmole[i]->hevcol_old-COmole[i]->hevcol) > conv.autocv*COmole[i]->hevcol )
                        {
                                /* not converged to within conv.autocv, normally 20 percent */
                                lgConverged = false;

                                /* for iterate to convergence, print reason why it was not converged 
                                 * on 3rd and higher iterations */
                                strcpy( conv.chNotConverged, "CO mol col" );
                                /*fprintf(ioQQQ,"debugggreset\t CO mole %li %li %.2e %.2e\n",
                                        i,iteration,COmole[i]->hevcol_old,COmole[i]->hevcol);*/

                                if( punch.lgPunConv )
                                {
                                        fprintf( punch.ipPunConv, "CO mol col, old:%.3e new:%.3e\n" ,
                                                COmole[i]->hevcol_old ,
                                                COmole[i]->hevcol );
                                }
                        }
                }

                /* check on dynamical convergence in wind model with negative velocity */
                if( dynamics.lgAdvection )
                {
                        /* >>chng 02 nov 29, as per Will Henney email */
                        if( dynamics.convergence_error > conv.autocv*dynamics.error_scale2*dynamics.convergence_tolerance ||
                            dynamics.discretization_error > conv.autocv*dynamics.error_scale2 )
                        {
                                lgConverged = false;
                                /* for iterate to convergence, print reason why it was not converged 
                                 * on 3rd and higher iterations */
                                strcpy( conv.chNotConverged, "Dynamics  " );
                                if( punch.lgPunConv )
                                {
                                        fprintf( punch.ipPunConv, " Dynamics\n" );
                                }
                        }
                }

                if( punch.lgPunConv && lgConverged )
                {
                        fprintf( punch.ipPunConv, " converged\n" );
                }

                /* lower limit to number of iterations if converged */
                if( lgConverged )
                        iterations.itermx = MIN2(iterations.itermx,iteration);

                /* >>chng 96 dec 20, moved following to within if on lgAutoIt
                 * this is test for stopping on first zone */
                if( phycon.te < StopCalc.tend && nzone == 1 )
                {
                        lgConverged = true;
                        strcpy( conv.chNotConverged, "          " );
                        iterations.itermx = MIN2(iterations.itermx,iteration);
                }
        }
        return;
}

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