test_turbulent_channel.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 "grins/parabolic_profile.h"
#include "libmesh/dirichlet_boundaries.h"
#include "libmesh/dof_map.h"
#include "libmesh/fe_base.h"
#include "libmesh/fe_interface.h"
#include "libmesh/mesh_function.h"
#include "libmesh/serial_mesh.h"
#include "libmesh/edge_edge2.h"
#include "libmesh/mesh_generation.h"
#include "libmesh/linear_implicit_system.h"
#include "libmesh/gmv_io.h"
#include "libmesh/exact_solution.h"

Include dependency graph for test_turbulent_channel.C:

Go to the source code of this file.

Classes
class	TurbulentBCFactory
class	TurbulentBdyFunctionU
class	TurbulentBdyFunctionNu

Functions
void	test_error_norm (libMesh::ExactSolution &exact_sol, const std::string &system_name, const std::string &var, const std::string &norm, const double tol, int &return_flag)
int	main (int argc, char *argv[])

Function Documentation

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

Definition at line 169 of file test_turbulent_channel.C.

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

{

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

  // Check command line count.
  if( argc < 2 )
    {
      // TODO: Need more consistent error handling.
      std::cerr << "Error: Must specify libMesh input 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);

  // Build a 1-d turbulent_bc_system to get the bc data from files
  libMesh::SerialMesh mesh(libmesh_init.comm());

  GetPot command_line(argc,argv);

  std::string oned_mesh = command_line("mesh-1d", "DIE!");
  mesh.read(oned_mesh);

  // And an EquationSystems to run on it
  libMesh::EquationSystems equation_systems (mesh);

  std::string oned_data = command_line("data-1d", "DIE!");
  equation_systems.read(oned_data, libMesh::XdrMODE::READ,
                        libMesh::EquationSystems::READ_HEADER |
                        libMesh::EquationSystems::READ_DATA |
                        libMesh::EquationSystems::READ_ADDITIONAL_DATA);

  // Get a reference to the system so that we can call update() on it
  libMesh::System & turbulent_bc_system = equation_systems.get_system<libMesh::System>("flow");

  // We need to call update to put system in a consistent state
  // with the solution that was read in
  turbulent_bc_system.update();

  // Print information about the system to the screen.
  equation_systems.print_info();

  // Prepare a global solution and a MeshFunction of the Turbulent system
  libMesh::AutoPtr<libMesh::MeshFunction> turbulent_bc_values;

  libMesh::AutoPtr<libMesh::NumericVector<libMesh::Number> > turbulent_bc_soln = libMesh::NumericVector<libMesh::Number>::build(equation_systems.comm());

  std::vector<libMesh::Number> flow_soln;

  turbulent_bc_system.update_global_solution(flow_soln);

  turbulent_bc_soln->init(turbulent_bc_system.solution->size(), true, libMesh::SERIAL);

  (*turbulent_bc_soln) = flow_soln;

  std::vector<unsigned int>turbulent_bc_system_variables;
  turbulent_bc_system_variables.push_back(0);
  turbulent_bc_system_variables.push_back(1);

  turbulent_bc_values = libMesh::AutoPtr<libMesh::MeshFunction>
    (new libMesh::MeshFunction(equation_systems,
                               *turbulent_bc_soln,
                               turbulent_bc_system.get_dof_map(),
                               turbulent_bc_system_variables ));

  turbulent_bc_values->init();

  GRINS::SimulationBuilder sim_builder;

  std::tr1::shared_ptr<TurbulentBCFactory> bc_factory( new TurbulentBCFactory(turbulent_bc_values.get()) );

  sim_builder.attach_bc_factory(bc_factory);

  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

  // Solve
  grins.run();

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

  // Create Exact solution object and attach exact solution quantities
  //libMesh::ExactSolution exact_sol(*es);

   // 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 = command_line("soln-data", "DIE!");
  es_ref.read( solution_file );

  exact_sol.attach_reference_solution( &es_ref );

  // Now grab the variables for which we want to compare
  unsigned int n_vars = command_line.vector_variable_size("vars");
  std::vector<std::string> vars(n_vars);
  for( unsigned int v = 0; v < n_vars; v++ )
    {
      vars[v] = command_line("vars", "DIE!", v);
    }

  // Now grab the norms to compute for each variable error
  unsigned int n_norms = command_line.vector_variable_size("norms");
  std::vector<std::string> norms(n_norms);
  for( unsigned int n = 0; n < n_norms; n++ )
    {
      norms[n] = command_line("norms", "DIE!", n);
      if( norms[n] != std::string("L2") &&
          norms[n] != std::string("H1") )
        {
          std::cerr << "ERROR: Invalid norm input " << norms[n] << std::endl
                    << "       Valid values are: L2" << std::endl
                    << "                         H1" << std::endl;
        }
    }

  const std::string& system_name = grins.get_multiphysics_system_name();

  // Now compute error for each variable
  for( unsigned int v = 0; v < n_vars; v++ )
    {
      exact_sol.compute_error(system_name, vars[v]);
    }

  int return_flag = 0;

  double tol = command_line("tol", 1.0e-10);

  // Now test error for each variable, for each norm
  for( unsigned int v = 0; v < n_vars; v++ )
    {
      for( unsigned int n = 0; n < n_norms; n++ )
        {
          test_error_norm( exact_sol, system_name, vars[v], norms[n], tol, return_flag );
        }
    }

  return return_flag;
}

void test_error_norm	(	libMesh::ExactSolution &	exact_sol,
		const std::string &	system_name,
		const std::string &	var,
		const std::string &	norm,
		const double	tol,
		int &	return_flag
	)

Definition at line 334 of file test_turbulent_channel.C.

Referenced by main().

{
  // We don't set return_flag unless we are setting it 1
  // since this function gets called multiple times and we don't
  // want to overwrite a previous "fail" (return_flag = 1) with
  // a "pass" (return_flag = 0)

  double error = 0.0;

  std::cout << "==========================================================" << std::endl
            << "Checking variable " << var << " using error norm " << norm << " with tol " << tol << "...";

  if( norm == std::string("L2") )
    {
      error = exact_sol.l2_error(system_name, var);
    }
  else if( norm == std::string("H1") )
    {
      error = exact_sol.h1_error(system_name, var);
    }
  else
    {
      std::cerr << "ERROR: Invalid norm " << norm << std::endl;
      exit(1);
    }

  if( error > tol )
    {
      return_flag = 1;

      std::cerr << "Tolerance exceeded for generic regression test!" << std::endl
                << "tolerance     = " << tol << std::endl
                << "norm of error = " << error << std::endl
                << "norm type     = " << norm << std::endl
                << "var           = " << var << std::endl;
    }
  else
    {
      std::cout << "PASSED!" << std::endl
                << "==========================================================" << std::endl;
    }

  return;
}