eighth_sphere_poisson.cc File Reference

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

Classes
class	EighthSpherePoissonProblem< ELEMENT >
	Poisson problem in refineable eighth of a sphere mesh. 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[])

Function Documentation

main()

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

///////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////// Driver for 3D Poisson problem in eighth of a sphere. Solution has a sharp step. If there are any command line arguments, we regard this as a validation run and perform only a single adaptation.

{ 
 
 // Store command line arguments
 CommandLineArgs::setup(argc,argv);
 
 // Set up the problem with 27-node brick elements, pass pointer to 
 // source function
 EighthSpherePoissonProblem<RefineableQPoissonElement<3,3> >
  problem(&TanhSolnForPoisson::get_source);
 
 // Setup labels for output
  DocInfo doc_info;
 
 // Output directory
 doc_info.set_directory("RESLT");
 
 // Step number
 doc_info.number()=0;
 
 // Check if we're ready to go
 cout << "Self test: " << problem.self_test() << std::endl;
 
 // Solve the problem
 problem.newton_solve();
 
 //Output solution
 problem.doc_solution(doc_info);
 
 //Increment counter for solutions 
 doc_info.number()++;
 
 // Now do (up to) three rounds of fully automatic adapation in response to 
 // error estimate
 unsigned max_solve;
 if (CommandLineArgs::Argc>1)
  {
   // Validation run: Just one adaptation
   max_solve=1;
   cout << "Only doing one adaptation for validation" << std::endl;
  }
 else
  {
   // Up to four adaptations
   max_solve=4;
  }
 
 for (unsigned isolve=0;isolve<max_solve;isolve++)
  {
   // Adapt problem/mesh
   problem.adapt(); 
         
   // Re-solve the problem if the adaptation has changed anything
   if ((problem.mesh_pt()->nrefined()  !=0)||
       (problem.mesh_pt()->nunrefined()!=0))
    {
     problem.newton_solve();
    }
   else
    {
     cout << "Mesh wasn't adapted --> we'll stop here" << std::endl;
     break;
    }
   
   //Output solution
   problem.doc_solution(doc_info);
   
   //Increment counter for solutions 
   doc_info.number()++;
  }
 
// pause("done");
 
} // end of main

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