BCDirichlet.c File Reference

Dirichlet boundary conditions. More...

#include <stdlib.h>
#include <basic.h>
#include <arrayfunctions.h>
#include <boundaryconditions.h>

Go to the source code of this file.

Functions
int	BCDirichletU (void *b, void *m, int ndims, int nvars, int *size, int ghosts, double *phi, double waqt)

Detailed Description

Dirichlet boundary conditions.

Author

Debojyoti Ghosh

Definition in file BCDirichlet.c.

Function Documentation

int BCDirichletU	(	void *	b,
		void *	m,
		int	ndims,
		int	nvars,
		int *	size,
		int	ghosts,
		double *	phi,
		double	waqt
	)

Applies (steady) Dirichlet boundary conditions for the solution: the ghost points at the physical boundaries are set to specified values

Parameters

b	Boundary object of type DomainBoundary
m	MPI object of type MPIVariables
ndims	Number of spatial dimensions
nvars	Number of variables/DoFs per grid point
size	Integer array with the number of grid points in each spatial dimension
ghosts	Number of ghost points
phi	The solution array on which to apply the boundary condition
waqt	Current solution time

Definition at line 13 of file BCDirichlet.c.

{
  DomainBoundary *boundary = (DomainBoundary*) b;

  if (boundary->on_this_proc) {
    int bounds[ndims], indexb[ndims];
    _ArraySubtract1D_(bounds,boundary->ie,boundary->is,ndims);
    _ArraySetValue_(indexb,ndims,0); 
    int done = 0;
    while (!done) {
      int p; _ArrayIndex1DWO_(ndims,size  ,indexb,boundary->is,ghosts,p);
      _ArrayCopy1D_((boundary->DirichletValue),(phi+nvars*p),nvars);
      _ArrayIncrementIndex_(ndims,bounds,indexb,done);
    }
  }
  return(0);
}