29 {
33 SystemType & system = es.add_system<SystemType>("ScalarSystem");
34
35 system.time_solver = std::make_unique<TimeSolverType>(system);
36
37 es.init();
38
39 DiffSolver & solver = *(system.time_solver->diff_solver().get());
43
44 NewtonSolver & newton = cast_ref<NewtonSolver &>(solver);
45
46
47
50
51 system.deltat = deltat;
52
53 TimeSolverType * time_solver = cast_ptr<TimeSolverType *>(system.time_solver.get());
55
56
57
58
59
60 std::vector<dof_id_type> solution_index;
61 solution_index.push_back(0);
62 const bool has_solution = system.get_dof_map().all_semilocal_indices(solution_index);
63
64 for (unsigned int t_step=0; t_step != n_timesteps; ++t_step)
65 {
66 system.solve();
67 system.time_solver->advance_timestep();
68
70
71 if (has_solution)
72 {
73 Number exact_soln = system.u(system.time);
74 rel_error = std::abs((exact_soln - (*system.solution)(0))/exact_soln);
75 }
76 system.comm().max(rel_error);
77
78
79 LIBMESH_ASSERT_FP_EQUAL( rel_error,
80 0.0,
81 std::numeric_limits<Real>::epsilon()*10 );
82 }
83 }
virtual void aux_time_solver_init(TimeSolverType &)
This is a generic class that defines a solver to handle ImplicitSystem classes, including NonlinearIm...
Real absolute_residual_tolerance
The DiffSolver should exit after the residual is reduced to either less than absolute_residual_tolera...
Real relative_residual_tolerance
Real relative_step_tolerance
This is the EquationSystems class.
void set_preconditioner_type(const PreconditionerType pct)
Sets the type of preconditioner to use.
void set_solver_type(const SolverType st)
Sets the type of solver to use.
The Mesh class is a thin wrapper, around the ReplicatedMesh class by default.
This class defines a solver which uses the default libMesh linear solver in a quasiNewton method to h...
LinearSolver< Number > & get_linear_solver()
DIE A HORRIBLE DEATH HERE typedef LIBMESH_DEFAULT_SCALAR_TYPE Real
