mesh_from_geompack_poisson.cc File Reference

#include "generic.h"
#include "poisson.h"
#include "meshes/geompack_mesh.h"

Classes
class	PoissonProblem< ELEMENT >
	Micky mouse Poisson problem. More...

Namespaces
	TanhSolnForPoisson
	Namespace for exact solution for Poisson equation with "sharp step".

Functions
void	TanhSolnForPoisson::get_exact_u (const Vector< double > &x, Vector< double > &u)
	Exact solution as a Vector. More...
void	TanhSolnForPoisson::get_exact_u (const Vector< double > &x, double &u)
	Exact solution as a scalar. More...
void	TanhSolnForPoisson::get_source (const Vector< double > &x, double &source)
	Source function to make it an exact solution. More...
int	main (int argc, char *argv[])
	Demonstrate how to solve Poisson problem. More...

Variables
double	TanhSolnForPoisson::Beta
	Parameter for angle of step. More...

Function Documentation

main()

int main	(	int argc	,
		char *	argv[]
	)

Demonstrate how to solve Poisson problem.

///////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////

Label for output

{
// Store command line arguments
 CommandLineArgs::setup(argc,argv);
 
 // Check number of command line arguments: Need exactly two.
 if (argc!=3)
  {
   std::string error_message =
    "Wrong number of command line arguments.\n";
   error_message +=
    "Must specify the following file names  \n";
   error_message += 
    "filename.mh2 then filename.cs2\n";
 
   throw OomphLibError(error_message,
                       OOMPH_CURRENT_FUNCTION,
                       OOMPH_EXCEPTION_LOCATION);
  }
 
 // Convert arguments to strings that specify the input file names
 string mesh_file_name(argv[1]);
 string curve_file_name(argv[2]);
 
 //Set up the problem
 PoissonProblem<QPoissonElement<2,2> > 
  problem(&TanhSolnForPoisson::get_source,
          mesh_file_name,curve_file_name);
 
 DocInfo doc_info;
 
 // Output directory
 doc_info.set_directory("RESLT");
  
 // Solve the problem
 problem.newton_solve();
 
 //Output solution
 problem.doc_solution(doc_info);
 
}

References TanhSolnForPoisson::get_source(), OOMPH_CURRENT_FUNCTION, OOMPH_EXCEPTION_LOCATION, problem, oomph::DocInfo::set_directory(), Flag_definition::setup(), and oomph::Global_string_for_annotation::string().