mesh_from_inline_triangle_internal_boundaries.cc File Reference

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

Function Documentation

main()

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

Demonstrate how to solve Poisson problem.

{
 
  // Store command line arguments
  CommandLineArgs::setup(argc,argv);
 
  // Label for output
  DocInfo doc_info;
 
  // Output directory
  doc_info.set_directory("RESLT");
 
 
  // Do the problem with cubic elements
  //-----------------------------------
  {
    cout << std::endl << "Cubic elements" << std::endl;
    cout <<         "==============" << std::endl << std::endl;
 
    //Set up the problem
    PoissonProblem<TPoissonElement<2,4> >
    problem(&TanhSolnForPoisson::get_source);
 
    // Solve the problem
    problem.newton_solve();
 
    //Output solution
    problem.doc_solution(doc_info);
 
    //Increment counter for solutions
    doc_info.number()++;
  }
 
 
  // Do the problem with quadratic elements
  //---------------------------------------
  {
    cout << std::endl  << "Quadratic elements" << std::endl;
    cout <<               "===================" << std::endl << std::endl;
 
    //Set up the problem
    PoissonProblem<TPoissonElement<2,3> >
    problem(&TanhSolnForPoisson::get_source);
 
    // Solve the problem
    problem.newton_solve();
 
    //Output solution
    problem.doc_solution(doc_info);
 
    //Increment counter for solutions
    doc_info.number()++;
  }
 
 
 
  // Do the problem with linear elements
  //------------------------------------
  {
    cout << std::endl << "Linear elements" << std::endl;
    cout <<              "===============" << std::endl << std::endl;
 
    //Set up the problem
    PoissonProblem<TPoissonElement<2,2> >
    problem(&TanhSolnForPoisson::get_source);
 
    // Solve the problem
    problem.newton_solve();
 
    //Output solution
    problem.doc_solution(doc_info);
 
    //Increment counter for solutions
    doc_info.number()++;
  }
 
}

References TanhSolnForPoisson::get_source(), oomph::DocInfo::number(), problem, oomph::DocInfo::set_directory(), and Flag_definition::setup().