elastic_sheet_regression.C File Reference

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

Include dependency graph for elastic_sheet_regression.C:

Go to the source code of this file.

Functions
libMesh::Real	initial_values (const libMesh::Point &p, const libMesh::Parameters &params, const std::string &system_name, const std::string &unknown_name)
int	run (int argc, char *argv[], const GetPot &input)
int	main (int argc, char *argv[])

Function Documentation

libMesh::Real initial_values	(	const libMesh::Point &	p,
		const libMesh::Parameters &	params,
		const std::string &	system_name,
		const std::string &	unknown_name
	)

Definition at line 122 of file 3d_low_mach_jacobians.C.

References GRINS::Constants::pi.

Referenced by main(), and run().

{
  libMesh::Real value = 0.0;

  if( unknown_name == "T" )
    value = params.get<libMesh::Real>("T_init");

  else if( unknown_name == "p0" )
    value = params.get<libMesh::Real>("p0_init");

  else
    value = 0.0;

  return value;
}

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

Definition at line 49 of file elastic_sheet_regression.C.

References run().

{
#ifdef 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 exact 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 );

  int return_flag = 0;

  return_flag = run( argc, argv, libMesh_inputfile );

  return return_flag;
}

int run	(	int	argc,
		char *	argv[],
		const GetPot &	input
	)

Definition at line 77 of file elastic_sheet_regression.C.

References GRINS::Simulation::run().

Referenced by main().

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

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

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

  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("StretchedElasticSheet", "u");
  exact_sol.compute_error("StretchedElasticSheet", "v");
  exact_sol.compute_error("StretchedElasticSheet", "w");

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

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

  double w_l2error = exact_sol.l2_error("StretchedElasticSheet", "w");
  double w_h1error = exact_sol.h1_error("StretchedElasticSheet", "w");

  int return_flag = 0;

  double tol = 5.0e-8;
  
  if( u_l2error > tol   || u_h1error > tol   ||
      v_l2error > tol   || v_h1error > tol   ||
      w_l2error > tol   || w_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;
    }

  return return_flag;
}