ShallowWater1DEigen.c File Reference

Contains the functions to compute left and right eigenvectors for the 1D shallow water equations. More...

#include <stdlib.h>
#include <math.h>
#include <basic.h>
#include <arrayfunctions.h>
#include <mathfunctions.h>
#include <physicalmodels/shallowwater1d.h>
#include <hypar.h>

Go to the source code of this file.

Functions
int	ShallowWater1DLeftEigenvectors (double *u, double *L, void *p, int dir)
int	ShallowWater1DRightEigenvectors (double *u, double *R, void *p, int dir)

Detailed Description

Contains the functions to compute left and right eigenvectors for the 1D shallow water equations.

Author

Debojyoti Ghosh

Definition in file ShallowWater1DEigen.c.

Function Documentation

ShallowWater1DLeftEigenvectors()

int ShallowWater1DLeftEigenvectors	(	double *	u,
		double *	L,
		void *	p,
		int	dir
	)

Compute the left eigenvections for the 1D shallow water equations. This function just calls the macro _ShallowWater1DLeftEigenvectors_ and is not used by any functions within the 1D shallow water module. However, it's necessary to define it and provide it to the the solver object (HyPar) so that it can then send it to interpolation functions for a characteristic-based reconstruction.

Parameters

u	Conserved solution at a grid point
L	Array of size nvar^2 = 2^2 to save the matrix of left eigenvectors in (row-major format).
p	Object of type ShallowWater1D with physics-related variables
dir	Spatial dimension (not used, since this is a 1D system)

Definition at line 19 of file ShallowWater1DEigen.c.

{
  ShallowWater1D *param  = (ShallowWater1D*)  p;
  _ShallowWater1DLeftEigenvectors_(u,L,param,dir);
  return(0);
}

ShallowWater1DRightEigenvectors()

int ShallowWater1DRightEigenvectors	(	double *	u,
		double *	R,
		void *	p,
		int	dir
	)

Compute the right eigenvections for the 1D shallow water equations. This function just calls the macro _ShallowWater1DRightEigenvectors_ and is not used by any functions within the 1D shallow water module. However, it's necessary to define it and provide it to the the solver object (HyPar) so that it can then send it to interpolation functions for a characteristic-based reconstruction.

Parameters

u	Conserved solution at a grid point
R	Array of size nvar^2 = 2^2 to save the matrix of right eigenvectors in (row-major format).
p	Object of type ShallowWater1D with physics-related variables
dir	Spatial dimension (not used, since this is a 1D system)

Definition at line 38 of file ShallowWater1DEigen.c.

{
  ShallowWater1D *param  = (ShallowWater1D*)  p;
  _ShallowWater1DRightEigenvectors_(u,R,param,dir);
  return(0);
}