test_thermally_driven_flow.C File Reference

#include "grins_config.h"
#include <iostream>
#include "grins/mesh_builder.h"
#include "grins/simulation.h"
#include "grins/simulation_builder.h"
#include "grins/multiphysics_sys.h"
#include "libmesh/exact_solution.h"

Include dependency graph for test_thermally_driven_flow.C:

Go to the source code of this file.

Classes
class	GRINS::ThermallyDrivenFlowTestBCFactory
class	GRINS::ZeroFluxBC

Namespaces
	GRINS
	GRINS namespace.

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

Function Documentation

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

Definition at line 76 of file test_thermally_driven_flow.C.

References GRINS::SimulationBuilder::attach_bc_factory(), and GRINS::Simulation::run().

{
#ifdef GRINS_USE_GRVY_TIMERS
  GRVY::GRVY_Timer_Class grvy_timer;
  grvy_timer.Init("GRINS Timer");
#endif

  // Check command line count.
  if( argc < 3 )
    {
      // TODO: Need more consistent error handling.
      std::cerr << "Error: Must specify libMesh input file and solution file." << std::endl;
      exit(1); // TODO: something more sophisticated for parallel runs?
    }

  // libMesh input file should be first argument
  std::string libMesh_input_filename = argv[1];
  
  // Create our GetPot object.
  GetPot libMesh_inputfile( libMesh_input_filename );

#ifdef GRINS_USE_GRVY_TIMERS
  grvy_timer.BeginTimer("Initialize Solver");
#endif

  // Initialize libMesh library.
  libMesh::LibMeshInit libmesh_init(argc, argv);
 
  GRINS::SimulationBuilder sim_builder;

  sim_builder.attach_bc_factory( std::tr1::shared_ptr<GRINS::BoundaryConditionsFactory>( new GRINS::ThermallyDrivenFlowTestBCFactory( libMesh_inputfile ) ) );

  GRINS::Simulation grins( libMesh_inputfile,
                           sim_builder,
                           libmesh_init.comm() );

#ifdef GRINS_USE_GRVY_TIMERS
  grvy_timer.EndTimer("Initialize Solver");

  // Attach GRVY timer to solver
  grins.attach_grvy_timer( &grvy_timer );
#endif

  // Do solve here
  grins.run();

  // Get equation systems to create ExactSolution object
  std::tr1::shared_ptr<libMesh::EquationSystems> es = grins.get_equation_system();

  //es->write("foobar.xdr");

  // Create Exact solution object and attach exact solution quantities
  libMesh::ExactSolution exact_sol(*es);
  
  libMesh::EquationSystems es_ref( es->get_mesh() );

  // Filename of file where comparison solution is stashed
  std::string solution_file = std::string(argv[2]);
  es_ref.read( solution_file );

  exact_sol.attach_reference_solution( &es_ref );
  
  // Compute error and get it in various norms
  exact_sol.compute_error("GRINS", "u");
  exact_sol.compute_error("GRINS", "v");

  if( (es->get_mesh()).mesh_dimension() == 3 )
    exact_sol.compute_error("GRINS", "w");

  exact_sol.compute_error("GRINS", "p");
  exact_sol.compute_error("GRINS", "T");

  double u_l2error = exact_sol.l2_error("GRINS", "u");
  double u_h1error = exact_sol.h1_error("GRINS", "u");

  double v_l2error = exact_sol.l2_error("GRINS", "v");
  double v_h1error = exact_sol.h1_error("GRINS", "v");

  double p_l2error = exact_sol.l2_error("GRINS", "p");
  double p_h1error = exact_sol.h1_error("GRINS", "p");

  double T_l2error = exact_sol.l2_error("GRINS", "T");
  double T_h1error = exact_sol.h1_error("GRINS", "T");
  
  double w_l2error = 0.0, 
         w_h1error = 0.0;

  if( (es->get_mesh()).mesh_dimension() == 3 )
    {
      w_l2error = exact_sol.l2_error("GRINS", "w");
      w_h1error = exact_sol.h1_error("GRINS", "w");
    }

  int return_flag = 0;

  // This is the tolerance of the iterative linear solver so
  // it's unreasonable to expect anything better than this.
  double tol = 8.0e-9;
  
  if( u_l2error > tol || u_h1error > tol ||
      v_l2error > tol || v_h1error > tol ||
      w_l2error > tol || w_h1error > tol ||
      p_l2error > tol || p_h1error > tol ||
      T_l2error > tol || T_h1error > tol   )
    {
      return_flag = 1;

      std::cout << "Tolerance exceeded for thermally driven flow test." << std::endl
                << "tolerance = " << tol << std::endl
                << "u l2 error = " << u_l2error << std::endl
                << "u h1 error = " << u_h1error << std::endl
                << "v l2 error = " << v_l2error << std::endl
                << "v h1 error = " << v_h1error << std::endl
                << "w l2 error = " << w_l2error << std::endl
                << "w h1 error = " << w_h1error << std::endl
                << "p l2 error = " << p_l2error << std::endl
                << "p h1 error = " << p_h1error << std::endl
                << "T l2 error = " << T_l2error << std::endl
                << "T h1 error = " << T_h1error << std::endl;
    }

 return return_flag;
}