EulerSolverSecondOrderTest Class Reference

Inheritance diagram for EulerSolverSecondOrderTest:

Public Member Functions
	CPPUNIT_TEST_SUITE (EulerSolverSecondOrderTest)
	CPPUNIT_TEST (testEulerSolverConstantSecondOrderODE)
	CPPUNIT_TEST_SUITE_END ()
void	testEulerSolverConstantSecondOrderODE ()

Protected Member Functions
virtual void	aux_time_solver_init (EulerSolver &time_solver)
virtual void	aux_time_solver_init (EulerSolver &time_solver)
void	set_theta (Real theta)
void	set_theta (Real theta)
void	run_test_with_exact_soln (Real deltat, unsigned int n_timesteps)

Protected Attributes
Real	_theta

Detailed Description

Definition at line 149 of file second_order_unsteady_solver_test.C.

Member Function Documentation

aux_time_solver_init() [1/2]

virtual void ThetaSolverTestBase< EulerSolver >::aux_time_solver_init ( EulerSolver &  time_solver )

inlineprotectedvirtualinherited

Reimplemented from TimeSolverTestImplementation< EulerSolver >.

Definition at line 63 of file first_order_unsteady_solver_test.C.

  { time_solver.theta = _theta; }

aux_time_solver_init() [2/2]

virtual void ThetaSolverTestBase< EulerSolver >::aux_time_solver_init ( EulerSolver &  time_solver )

inlineprotectedvirtualinherited

Reimplemented from TimeSolverTestImplementation< EulerSolver >.

Definition at line 140 of file second_order_unsteady_solver_test.C.

  { time_solver.theta = _theta; }

CPPUNIT_TEST()

EulerSolverSecondOrderTest::CPPUNIT_TEST

(

testEulerSolverConstantSecondOrderODE

)

CPPUNIT_TEST_SUITE()

EulerSolverSecondOrderTest::CPPUNIT_TEST_SUITE

(

EulerSolverSecondOrderTest

)

CPPUNIT_TEST_SUITE_END()

EulerSolverSecondOrderTest::CPPUNIT_TEST_SUITE_END

(

)

run_test_with_exact_soln()

void TimeSolverTestImplementation< EulerSolver >::run_test_with_exact_soln ( Real  deltat, unsigned int  n_timesteps  )

inlineprotectedinherited

Definition at line 27 of file time_solver_test_common.h.

  {
    Mesh mesh(*TestCommWorld);
    MeshTools::Generation::build_point(mesh);
    EquationSystems es(mesh);
    SystemType & system = es.add_system<SystemType>("ScalarSystem");
 
    system.time_solver = libmesh_make_unique<TimeSolverType>(system);
 
    es.init();
 
    DiffSolver & solver = *(system.time_solver->diff_solver().get());
    solver.relative_step_tolerance = std::numeric_limits<Real>::epsilon()*10;
    solver.relative_residual_tolerance = std::numeric_limits<Real>::epsilon()*10;
    solver.absolute_residual_tolerance = std::numeric_limits<Real>::epsilon()*10;
 
    NewtonSolver & newton = cast_ref<NewtonSolver &>(solver);
 
    // LASPACK GMRES + ILU defaults don't like these problems, so
    // we'll use a sophisticated "just divide the scalars" solver instead.
    newton.get_linear_solver().set_solver_type(JACOBI);
    newton.get_linear_solver().set_preconditioner_type(IDENTITY_PRECOND);
 
    system.deltat = deltat;
 
    TimeSolverType * time_solver = cast_ptr<TimeSolverType *>(system.time_solver.get());
    this->aux_time_solver_init(*time_solver);
 
    // We're going to want to check our solution, and when we run
    // "make check" with LIBMESH_RUN='mpirun -np N" for N>1 then we'll
    // need to keep that check in sync with the processors that are just
    // twiddling their thumbs, not owning our mesh point.
    std::vector<dof_id_type> solution_index;
    solution_index.push_back(0);
    const bool has_solution = system.get_dof_map().all_semilocal_indices(solution_index);
 
    for (unsigned int t_step=0; t_step != n_timesteps; ++t_step)
      {
        system.solve();
        system.time_solver->advance_timestep();
 
        Real rel_error = 0;
 
        if (has_solution)
          {
            Number exact_soln = system.u(system.time);
            rel_error =  std::abs((exact_soln - (*system.solution)(0))/exact_soln);
          }
        system.comm().max(rel_error);
 
        // Using relative error for comparison, so "exact" is 0
        LIBMESH_ASSERT_FP_EQUAL( 0.0,
                                 rel_error,
                                 std::numeric_limits<Real>::epsilon()*10 );
      }
  }

set_theta() [1/2]

void ThetaSolverTestBase< EulerSolver >::set_theta ( Real  theta )

inlineprotectedinherited

Definition at line 66 of file first_order_unsteady_solver_test.C.

  { _theta = theta; }

set_theta() [2/2]

void ThetaSolverTestBase< EulerSolver >::set_theta ( Real  theta )

inlineprotectedinherited

Definition at line 143 of file second_order_unsteady_solver_test.C.

  { _theta = theta; }

testEulerSolverConstantSecondOrderODE()

void EulerSolverSecondOrderTest::testEulerSolverConstantSecondOrderODE ( )

inline

Definition at line 163 of file second_order_unsteady_solver_test.C.

  {
    this->set_theta(0.5);
    this->run_test_with_exact_soln<ConstantSecondOrderODE<SecondOrderScalarSystemFirstOrderTimeSolverBase>>(0.5,10);
  }

References ThetaSolverTestBase< EulerSolver >::set_theta().

Member Data Documentation

_theta

Real ThetaSolverTestBase< EulerSolver >::_theta

protectedinherited

Definition at line 69 of file first_order_unsteady_solver_test.C.

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The documentation for this class was generated from the following file:

• tests/solvers/second_order_unsteady_solver_test.C