Euler1DSourceUpwind.c

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#include <stdlib.h>
#include <math.h>
#include <basic.h>
#include <arrayfunctions.h>
#include <mathfunctions.h>
#include <physicalmodels/euler1d.h>
#include <hypar.h>

int Euler1DSourceUpwindLLF(
                            double  *fI, 
                            double  *fL, 
                            double  *fR, 
                            double  *u,  
                            int     dir, 
                            void    *s,  
                            double  t    
                          )
{
  HyPar     *solver = (HyPar*)    s;
  int       done,k;
  _DECLARE_IERR_;

  int ndims = solver->ndims;
  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);
      /* Local Lax-Friedrich upwinding scheme */
      for (k = 0; k < _MODEL_NVARS_; k++) 
        (fI+_MODEL_NVARS_*p)[k] = 0.5 * ((fL+_MODEL_NVARS_*p)[k] + (fR+_MODEL_NVARS_*p)[k]);
    }
    _ArrayIncrementIndex_(ndims,bounds_outer,index_outer,done);
  }

  return(0);
}

int Euler1DSourceUpwindRoe(
                            double  *fI, 
                            double  *fL, 
                            double  *fR, 
                            double  *u,  
                            int     dir, 
                            void    *s,  
                            double  t    
                          )
{
  HyPar     *solver = (HyPar*)    s;
  int       done,k;
  _DECLARE_IERR_;

  int ndims = solver->ndims;
  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);
      /* Local Lax-Friedrich upwinding scheme */
      for (k = 0; k < _MODEL_NVARS_; k++) 
        (fI+_MODEL_NVARS_*p)[k] = 0.5 * ((fL+_MODEL_NVARS_*p)[k] + (fR+_MODEL_NVARS_*p)[k]);
    }
    _ArrayIncrementIndex_(ndims,bounds_outer,index_outer,done);
  }

  return(0);
}