libMesh
Public Member Functions | Protected Member Functions | Protected Attributes | List of all members
Euler2SolverSecondOrderTest Class Reference
Inheritance diagram for Euler2SolverSecondOrderTest:
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Public Member Functions

 CPPUNIT_TEST_SUITE (Euler2SolverSecondOrderTest)
 
 CPPUNIT_TEST (testEuler2SolverConstantSecondOrderODE)
 
 CPPUNIT_TEST_SUITE_END ()
 
void testEuler2SolverConstantSecondOrderODE ()
 

Protected Member Functions

virtual void aux_time_solver_init (Euler2Solver &time_solver)
 
virtual void aux_time_solver_init (Euler2Solver &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 184 of file second_order_unsteady_solver_test.C.

Member Function Documentation

virtual void ThetaSolverTestBase< Euler2Solver >::aux_time_solver_init ( Euler2Solver &  time_solver)
protectedvirtualinherited
virtual void ThetaSolverTestBase< Euler2Solver >::aux_time_solver_init ( Euler2Solver &  time_solver)
protectedvirtualinherited
Euler2SolverSecondOrderTest::CPPUNIT_TEST ( testEuler2SolverConstantSecondOrderODE  )
Euler2SolverSecondOrderTest::CPPUNIT_TEST_SUITE ( Euler2SolverSecondOrderTest  )
Euler2SolverSecondOrderTest::CPPUNIT_TEST_SUITE_END ( )
void TimeSolverTestImplementation< Euler2Solver >::run_test_with_exact_soln ( Real  deltat,
unsigned int  n_timesteps 
)
protectedinherited

Definition at line 18 of file time_solver_test_common.h.

19  {
23  SystemType & system = es.add_system<SystemType>("ScalarSystem");
24 
25  system.time_solver.reset(new TimeSolverType(system));
26 
27  es.init();
28 
29  DiffSolver & solver = *(system.time_solver->diff_solver().get());
30  solver.relative_step_tolerance = std::numeric_limits<Real>::epsilon()*10;
31  solver.relative_residual_tolerance = std::numeric_limits<Real>::epsilon()*10;
32  solver.absolute_residual_tolerance = std::numeric_limits<Real>::epsilon()*10;
33 
34  system.deltat = deltat;
35 
36  TimeSolverType * time_solver = cast_ptr<TimeSolverType *>(system.time_solver.get());
37  this->aux_time_solver_init(*time_solver);
38 
39  // We're going to want to check our solution, and when we run
40  // "make check" with LIBMESH_RUN='mpirun -np N" for N>1 then we'll
41  // need to avoid checking on the processors that are just
42  // twiddling their thumbs, not owning our mesh point.
43  std::vector<dof_id_type> solution_index;
44  solution_index.push_back(0);
45  const bool has_solution = system.get_dof_map().all_semilocal_indices(solution_index);
46 
47  for (unsigned int t_step=0; t_step != n_timesteps; ++t_step)
48  {
49  system.solve();
50  system.time_solver->advance_timestep();
51 
52  if (has_solution)
53  {
54  // Use relative error for comparison, so "exact" is 0
55  Number exact_soln = system.u(system.time);
56  Real rel_error = std::abs((exact_soln - (*system.solution)(0))/exact_soln);
57 
58  CPPUNIT_ASSERT_DOUBLES_EQUAL( 0.0,
59  rel_error,
60  std::numeric_limits<Real>::epsilon()*10 );
61  }
62  }
63  }
double abs(double a)
This is the EquationSystems class.
void build_point(UnstructuredMesh &mesh, const ElemType type=INVALID_ELEM, const bool gauss_lobatto_grid=false)
A specialized build_cube() for 0D meshes.
libMesh::Parallel::Communicator * TestCommWorld
Definition: driver.C:28
Real absolute_residual_tolerance
The DiffSolver should exit after the residual is reduced to either less than absolute_residual_tolera...
Definition: diff_solver.h:191
MeshBase & mesh
PetscDiffSolver & solver
This is a generic class that defines a solver to handle ImplicitSystem classes, including NonlinearIm...
Definition: diff_solver.h:70
DIE A HORRIBLE DEATH HERE typedef LIBMESH_DEFAULT_SCALAR_TYPE Real
The Mesh class is a thin wrapper, around the ReplicatedMesh class by default.
Definition: mesh.h:50
Real relative_residual_tolerance
Definition: diff_solver.h:192
void ThetaSolverTestBase< Euler2Solver >::set_theta ( Real  theta)
protectedinherited
void ThetaSolverTestBase< Euler2Solver >::set_theta ( Real  theta)
protectedinherited
void Euler2SolverSecondOrderTest::testEuler2SolverConstantSecondOrderODE ( )

Definition at line 195 of file second_order_unsteady_solver_test.C.

References CPPUNIT_TEST_SUITE_REGISTRATION().

196  {
197  this->set_theta(0.5);
198  this->run_test_with_exact_soln<ConstantSecondOrderODE<SecondOrderScalarSystemFirstOrderTimeSolverBase>>(0.5,10);
199  }

Member Data Documentation

Real ThetaSolverTestBase< Euler2Solver >::_theta
protectedinherited

Definition at line 87 of file first_order_unsteady_solver_test.C.


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