FPDoubleWellInitialize.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <basic.h>
#include <arrayfunctions.h>
#include <physicalmodels/fpdoublewell.h>
#include <mpivars.h>
#include <hypar.h>

Go to the source code of this file.

Functions
double	FPDoubleWellComputeCFL (void *, void *, double, double)
double	FPDoubleWellComputeDiffNumber (void *, void *, double, double)
int	FPDoubleWellAdvection (double *, double *, int, void *, double)
int	FPDoubleWellDiffusion (double *, double *, int, void *, double)
int	FPDoubleWellUpwind (double *, double *, double *, double *, double *, double *, int, void *, double)
int	FPDoubleWellPostStep (double *, void *, void *, double, int)
int	FPDoubleWellPrintStep (void *, void *, double)
int	FPDoubleWellInitialize (void *s, void *m)

Function Documentation

FPDoubleWellComputeCFL()

double FPDoubleWellComputeCFL	(	void *	,
		void *	,
		double	,
		double
	)

Definition at line 7 of file FPDoubleWellComputeCFL.c.

{
  HyPar         *solver = (HyPar*)        s;
  int           d, i, v;

  int     ndims  = solver->ndims;
  int     nvars  = solver->nvars;
  int     ghosts = solver->ghosts;
  int     *dim   = solver->dim_local;
  double  *dxinv = solver->dxinv;

  int     offset  = 0;
  double  max_cfl = 0;
  for (d = 0; d < ndims; d++) {
    for (i = 0; i < dim[d]; i++) {
      for (v = 0; v < nvars; v++) {
        double x; _GetCoordinate_(0,i,dim,ghosts,solver->x,x);
        double local_cfl =  absolute(drift(x)) * dt 
                          * dxinv[offset+ghosts+i];
        if (local_cfl > max_cfl) max_cfl = local_cfl;
      }
    }
    offset += dim[d] + 2*ghosts;
  }

  return(max_cfl);
}

FPDoubleWellComputeDiffNumber()

double FPDoubleWellComputeDiffNumber	(	void *	,
		void *	,
		double	,
		double
	)

Definition at line 5 of file FPDoubleWellComputeDiffNumber.c.

{
  HyPar         *solver = (HyPar*)        s;
  FPDoubleWell  *params = (FPDoubleWell*) solver->physics;
  int           d, i, v;

  int     ndims  = solver->ndims;
  int     nvars  = solver->nvars;
  int     ghosts = solver->ghosts;
  int     *dim   = solver->dim_local;
  double  *dxinv = solver->dxinv;

  int     offset  = 0;
  double  max_diffno = 0;
  for (d = 0; d < ndims; d++) {
    for (i = 0; i < dim[d]; i++) {
      for (v = 0; v < nvars; v++) {
        double local_diffno =   0.5 * params->q * dt 
                              * dxinv[offset+ghosts+i] 
                              * dxinv[offset+ghosts+i];
        if (local_diffno > max_diffno) max_diffno = local_diffno;
      }
    }
    offset += dim[d] + 2*ghosts;
  }

  return(max_diffno);
}

FPDoubleWellAdvection()

int FPDoubleWellAdvection	(	double *	,
		double *	,
		int	,
		void *	,
		double
	)

Definition at line 7 of file FPDoubleWellAdvection.c.

{
  HyPar         *solver = (HyPar*)        s;
  int           i, v;

  int *dim    = solver->dim_local;
  int ghosts  = solver->ghosts;
  int ndims   = solver->ndims;
  int nvars   = solver->nvars;
  int index[ndims], bounds[ndims], offset[ndims];

  /* set bounds for array index to include ghost points */
  _ArrayCopy1D_(dim,bounds,ndims);
  for (i=0; i<ndims; i++) bounds[i] += 2*ghosts;

  /* set offset such that index is compatible with ghost point arrangement */
  _ArraySetValue_(offset,ndims,-ghosts);

  int done = 0; _ArraySetValue_(index,ndims,0);
  while (!done) {
    int p; _ArrayIndex1DWO_(ndims,dim,index,offset,ghosts,p);
    double x; _GetCoordinate_(0,index[0]-ghosts,dim,ghosts,solver->x,x);
    for (v = 0; v < nvars; v++) f[nvars*p+v] = drift(x) * u[nvars*p+v];
    _ArrayIncrementIndex_(ndims,bounds,index,done);
  }

  return(0);
}

FPDoubleWellDiffusion()

int FPDoubleWellDiffusion	(	double *	,
		double *	,
		int	,
		void *	,
		double
	)

Definition at line 7 of file FPDoubleWellDiffusion.c.

{
  HyPar         *solver = (HyPar*)        s;
  FPDoubleWell  *param  = (FPDoubleWell*) solver->physics;
  int           i, v;

  int *dim    = solver->dim_local;
  int ghosts  = solver->ghosts;
  int ndims   = solver->ndims;
  int nvars   = solver->nvars;
  int index[ndims], bounds[ndims], offset[ndims];

  /* set bounds for array index to include ghost points */
  _ArrayCopy1D_(dim,bounds,ndims);
  for (i=0; i<ndims; i++) bounds[i] += 2*ghosts;

  /* set offset such that index is compatible with ghost point arrangement */
  _ArraySetValue_(offset,ndims,-ghosts);

  int done = 0; _ArraySetValue_(index,ndims,0);
  while (!done) {
    int p; _ArrayIndex1DWO_(ndims,dim,index,offset,ghosts,p);
    for (v = 0; v < nvars; v++) f[nvars*p+v] = 0.5*param->q * u[nvars*p+v];
    _ArrayIncrementIndex_(ndims,bounds,index,done);
  }

  return(0);
}

FPDoubleWellUpwind()

int FPDoubleWellUpwind	(	double *	,
		double *	,
		double *	,
		double *	,
		double *	,
		double *	,
		int	,
		void *	,
		double
	)

Definition at line 7 of file FPDoubleWellUpwind.c.

{
  HyPar        *solver = (HyPar*) s;
  int          done,v;

  int ndims   = solver->ndims;
  int nvars   = solver->nvars;
  int ghosts  = solver->ghosts;
  int *dim    = solver->dim_local;

  int index_outer[ndims], index_inter[ndims], bounds_outer[ndims], bounds_inter[ndims];
  _ArrayCopy1D_(dim,bounds_outer,ndims); bounds_outer[dir] =  1;
  _ArrayCopy1D_(dim,bounds_inter,ndims); bounds_inter[dir] += 1;

  done = 0; _ArraySetValue_(index_outer,ndims,0);
  while (!done) {
    _ArrayCopy1D_(index_outer,index_inter,ndims);
    for (index_inter[dir] = 0; index_inter[dir] < bounds_inter[dir]; index_inter[dir]++) {
      int p; _ArrayIndex1D_(ndims,bounds_inter,index_inter,0,p);
      double x1; _GetCoordinate_(0,index_inter[0]-1,dim,ghosts,solver->x,x1);
      double x2; _GetCoordinate_(0,index_inter[0]  ,dim,ghosts,solver->x,x2);
      double x = 0.5 * ( x1 + x2 );
      for (v = 0; v < nvars; v++)  
        fI[nvars*p+v] = (drift(x) > 0 ? fL[nvars*p+v] : fR[nvars*p+v] );
    }
    _ArrayIncrementIndex_(ndims,bounds_outer,index_outer,done);
  }

  return(0);
}

FPDoubleWellPostStep()

int FPDoubleWellPostStep	(	double *	,
		void *	,
		void *	,
		double	,
		int
	)

Definition at line 8 of file FPDoubleWellPostStep.c.

{
  HyPar         *solver = (HyPar*)        s;
  MPIVariables  *mpi    = (MPIVariables*) m;
  FPDoubleWell  *params = (FPDoubleWell*) solver->physics;
  _DECLARE_IERR_;

  int *dim    = solver->dim_local;
  int ghosts  = solver->ghosts;
  int ndims   = solver->ndims;
  int index[ndims];

  double local_sum = 0;
  int done = 0; _ArraySetValue_(index,ndims,0);
  while (!done) {
    int p; _ArrayIndex1D_(ndims,dim,index,ghosts,p);
    double dx = 1.0 / solver->dxinv[index[0]+ghosts];
    local_sum     += (u[p] * dx);
    _ArrayIncrementIndex_(ndims,dim,index,done);
  }
  double local_integral = local_sum;
  double global_integral = 0; 
  IERR MPISum_double(&global_integral,&local_integral,1,&mpi->world); CHECKERR(ierr);
  params->pdf_integral = global_integral;

  return(0);
}

FPDoubleWellPrintStep()

int FPDoubleWellPrintStep	(	void *	,
		void *	,
		double
	)

Definition at line 5 of file FPDoubleWellPrintStep.c.

{
  HyPar         *solver = (HyPar*)        s;
  FPDoubleWell  *params = (FPDoubleWell*) solver->physics;
  printf("Domain integral of the probability density function: %1.16E\n",params->pdf_integral);
  return(0);
}

FPDoubleWellInitialize()

int FPDoubleWellInitialize	(	void *	s,
		void *	m
	)

Definition at line 19 of file FPDoubleWellInitialize.c.

{
  HyPar         *solver  = (HyPar*)         s;
  MPIVariables  *mpi     = (MPIVariables*)  m; 
  FPDoubleWell  *physics = (FPDoubleWell*)  solver->physics;
  int           ferr     = 0;
  _DECLARE_IERR_;

  static int count = 0;

  if (solver->nvars != _MODEL_NVARS_) {
    fprintf(stderr,"Error in FPDoubleWellInitializeO(): nvars has to be %d.\n",_MODEL_NVARS_);
    return(1);
  }
  if (solver->ndims != _MODEL_NDIMS_) {
    fprintf(stderr,"Error in FPDoubleWellInitializeO(): ndims has to be %d.\n",_MODEL_NDIMS_);
    return(1);
  }

  /* reading physical model specific inputs - all processes */
  if (!mpi->rank) {
    FILE *in;
    if (!count) printf("Reading physical model inputs from file \"physics.inp\".\n");
    in = fopen("physics.inp","r");
    if (!in) {
      fprintf(stderr,"Error: File \"physics.inp\" not found.\n");
      return(1);
    } else {
      char word[_MAX_STRING_SIZE_];
      ferr = fscanf(in,"%s",word); if (ferr != 1) return(1);
      if (!strcmp(word, "begin")){
          while (strcmp(word, "end")){
              ferr = fscanf(in,"%s",word); if (ferr != 1) return(1);
          if (!strcmp(word, "q")) {
            /* read diffusion coefficient */
            ferr = fscanf(in,"%lf",&physics->q);
            if (ferr != 1) return(1);
          } else if (strcmp(word,"end")) {
            char useless[_MAX_STRING_SIZE_];
            ferr = fscanf(in,"%s",useless); if (ferr != 1) return(ferr);
            printf("Warning: keyword %s in file \"physics.inp\" with value %s not ",word,useless);
            printf("recognized or extraneous. Ignoring.\n");
          }
        }
        } else {
          fprintf(stderr,"Error: Illegal format in file \"physics.inp\".\n");
        return(1);
        }
    }
    fclose(in);
  }

#ifndef serial
  IERR MPIBroadcast_double(&physics->q,1,0,&mpi->world); CHECKERR(ierr);
#endif

  if (!strcmp(solver->SplitHyperbolicFlux,"yes")) {
    if (!mpi->rank) {
      fprintf(stderr,"Error in FPDoubleWellInitialize: This physical model does not have a splitting ");
      fprintf(stderr,"of the hyperbolic term defined.\n");
    }
    return(1);
  }

  /* initializing physical model-specific functions */
  solver->ComputeCFL         = FPDoubleWellComputeCFL;
  solver->ComputeDiffNumber  = FPDoubleWellComputeDiffNumber;
  solver->FFunction          = FPDoubleWellAdvection;
  solver->GFunction          = FPDoubleWellDiffusion;
  solver->Upwind             = FPDoubleWellUpwind;
  solver->PostStep           = FPDoubleWellPostStep;
  solver->PrintStep          = FPDoubleWellPrintStep;

  /* Calculate and print the PDF integral of the initial solution */
  IERR FPDoubleWellPostStep(solver->u,solver,mpi,0.0,0);CHECKERR(ierr);
  IERR FPDoubleWellPrintStep(solver,mpi,0.0);           CHECKERR(ierr);
  
  count++;
  return(0);
}