DemoPoissonProblem Class Reference

Inheritance diagram for DemoPoissonProblem:

Public Member Functions
	DemoPoissonProblem (const int &sign=1)
void	actions_before_newton_solve ()
	Check that everything has been set up properly. More...
void	actions_after_newton_solve ()
	Print out the result after the solve. More...
Public Member Functions inherited from oomph::Problem
virtual void	debug_hook_fct (const unsigned &i)
void	set_analytic_dparameter (double *const &parameter_pt)
void	unset_analytic_dparameter (double *const &parameter_pt)
bool	is_dparameter_calculated_analytically (double *const &parameter_pt)
void	set_analytic_hessian_products ()
void	unset_analytic_hessian_products ()
bool	are_hessian_products_calculated_analytically ()
void	set_pinned_values_to_zero ()
bool	distributed () const
virtual void	actions_before_adapt ()
virtual void	actions_after_adapt ()
	Actions that are to be performed after a mesh adaptation. More...
OomphCommunicator *	communicator_pt ()
	access function to the oomph-lib communicator More...
const OomphCommunicator *	communicator_pt () const
	access function to the oomph-lib communicator, const version More...
	Problem ()
	Problem (const Problem &dummy)=delete
	Broken copy constructor. More...
void	operator= (const Problem &)=delete
	Broken assignment operator. More...
virtual	~Problem ()
	Virtual destructor to clean up memory. More...
Mesh *&	mesh_pt ()
	Return a pointer to the global mesh. More...
Mesh *const &	mesh_pt () const
	Return a pointer to the global mesh (const version) More...
Mesh *&	mesh_pt (const unsigned &imesh)
Mesh *const &	mesh_pt (const unsigned &imesh) const
	Return a pointer to the i-th submesh (const version) More...
unsigned	nsub_mesh () const
	Return number of submeshes. More...
unsigned	add_sub_mesh (Mesh *const &mesh_pt)
void	flush_sub_meshes ()
void	build_global_mesh ()
void	rebuild_global_mesh ()
LinearSolver *&	linear_solver_pt ()
	Return a pointer to the linear solver object. More...
LinearSolver *const &	linear_solver_pt () const
	Return a pointer to the linear solver object (const version) More...
LinearSolver *&	mass_matrix_solver_for_explicit_timestepper_pt ()
LinearSolver *	mass_matrix_solver_for_explicit_timestepper_pt () const
EigenSolver *&	eigen_solver_pt ()
	Return a pointer to the eigen solver object. More...
EigenSolver *const &	eigen_solver_pt () const
	Return a pointer to the eigen solver object (const version) More...
Time *&	time_pt ()
	Return a pointer to the global time object. More...
Time *	time_pt () const
	Return a pointer to the global time object (const version). More...
double &	time ()
	Return the current value of continuous time. More...
double	time () const
	Return the current value of continuous time (const version) More...
TimeStepper *&	time_stepper_pt ()
const TimeStepper *	time_stepper_pt () const
TimeStepper *&	time_stepper_pt (const unsigned &i)
	Return a pointer to the i-th timestepper. More...
ExplicitTimeStepper *&	explicit_time_stepper_pt ()
	Return a pointer to the explicit timestepper. More...
unsigned long	set_timestepper_for_all_data (TimeStepper *const &time_stepper_pt, const bool &preserve_existing_data=false)
virtual void	shift_time_values ()
	Shift all values along to prepare for next timestep. More...
AssemblyHandler *&	assembly_handler_pt ()
	Return a pointer to the assembly handler object. More...
AssemblyHandler *const &	assembly_handler_pt () const
	Return a pointer to the assembly handler object (const version) More...
double &	minimum_dt ()
	Access function to min timestep in adaptive timestepping. More...
double &	maximum_dt ()
	Access function to max timestep in adaptive timestepping. More...
unsigned &	max_newton_iterations ()
	Access function to max Newton iterations before giving up. More...
void	problem_is_nonlinear (const bool &prob_lin)
	Access function to Problem_is_nonlinear. More...
double &	max_residuals ()
bool &	time_adaptive_newton_crash_on_solve_fail ()
	Access function for Time_adaptive_newton_crash_on_solve_fail. More...
double &	newton_solver_tolerance ()
void	add_time_stepper_pt (TimeStepper *const &time_stepper_pt)
void	set_explicit_time_stepper_pt (ExplicitTimeStepper *const &explicit_time_stepper_pt)
void	initialise_dt (const double &dt)
void	initialise_dt (const Vector< double > &dt)
Data *&	global_data_pt (const unsigned &i)
	Return a pointer to the the i-th global data object. More...
void	add_global_data (Data *const &global_data_pt)
void	flush_global_data ()
LinearAlgebraDistribution *const &	dof_distribution_pt () const
	Return the pointer to the dof distribution (read-only) More...
unsigned long	ndof () const
	Return the number of dofs. More...
unsigned	ntime_stepper () const
	Return the number of time steppers. More...
unsigned	nglobal_data () const
	Return the number of global data values. More...
unsigned	self_test ()
	Self-test: Check meshes and global data. Return 0 for OK. More...
void	enable_store_local_dof_pt_in_elements ()
void	disable_store_local_dof_pt_in_elements ()
unsigned long	assign_eqn_numbers (const bool &assign_local_eqn_numbers=true)
void	describe_dofs (std::ostream &out= *(oomph_info.stream_pt())) const
void	enable_discontinuous_formulation ()
void	disable_discontinuous_formulation ()
void	get_dofs (DoubleVector &dofs) const
void	get_dofs (const unsigned &t, DoubleVector &dofs) const
	Return vector of the t'th history value of all dofs. More...
void	set_dofs (const DoubleVector &dofs)
	Set the values of the dofs. More...
void	set_dofs (const unsigned &t, DoubleVector &dofs)
	Set the history values of the dofs. More...
void	set_dofs (const unsigned &t, Vector< double * > &dof_pt)
void	add_to_dofs (const double &lambda, const DoubleVector &increment_dofs)
	Add lambda x incremenet_dofs[l] to the l-th dof. More...
double *	global_dof_pt (const unsigned &i)
double &	dof (const unsigned &i)
	i-th dof in the problem More...
double	dof (const unsigned &i) const
	i-th dof in the problem (const version) More...
double *&	dof_pt (const unsigned &i)
	Pointer to i-th dof in the problem. More...
double *	dof_pt (const unsigned &i) const
	Pointer to i-th dof in the problem (const version) More...
virtual void	get_inverse_mass_matrix_times_residuals (DoubleVector &Mres)
virtual void	get_dvaluesdt (DoubleVector &f)
virtual void	get_residuals (DoubleVector &residuals)
	Get the total residuals Vector for the problem. More...
virtual void	get_jacobian (DoubleVector &residuals, DenseDoubleMatrix &jacobian)
virtual void	get_jacobian (DoubleVector &residuals, CRDoubleMatrix &jacobian)
virtual void	get_jacobian (DoubleVector &residuals, CCDoubleMatrix &jacobian)
virtual void	get_jacobian (DoubleVector &residuals, SumOfMatrices &jacobian)
void	get_fd_jacobian (DoubleVector &residuals, DenseMatrix< double > &jacobian)
	Get the full Jacobian by finite differencing. More...
void	get_derivative_wrt_global_parameter (double *const &parameter_pt, DoubleVector &result)
void	get_hessian_vector_products (DoubleVectorWithHaloEntries const &Y, Vector< DoubleVectorWithHaloEntries > const &C, Vector< DoubleVectorWithHaloEntries > &product)
void	solve_eigenproblem (const unsigned &n_eval, Vector< std::complex< double >> &eigenvalue, Vector< DoubleVector > &eigenvector, const bool &steady=true)
	Solve the eigenproblem. More...
void	solve_eigenproblem (const unsigned &n_eval, Vector< std::complex< double >> &eigenvalue, const bool &steady=true)
virtual void	get_eigenproblem_matrices (CRDoubleMatrix &mass_matrix, CRDoubleMatrix &main_matrix, const double &shift=0.0)
void	assign_eigenvector_to_dofs (DoubleVector &eigenvector)
	Assign the eigenvector passed to the function to the dofs. More...
void	add_eigenvector_to_dofs (const double &epsilon, const DoubleVector &eigenvector)
void	store_current_dof_values ()
	Store the current values of the degrees of freedom. More...
void	restore_dof_values ()
	Restore the stored values of the degrees of freedom. More...
void	enable_jacobian_reuse ()
void	disable_jacobian_reuse ()
	Disable recycling of Jacobian in Newton iteration. More...
bool	jacobian_reuse_is_enabled ()
	Is recycling of Jacobian in Newton iteration enabled? More...
bool &	use_predictor_values_as_initial_guess ()
void	newton_solve ()
	Use Newton method to solve the problem. More...
void	enable_globally_convergent_newton_method ()
	enable globally convergent Newton method More...
void	disable_globally_convergent_newton_method ()
	disable globally convergent Newton method More...
void	newton_solve (unsigned const &max_adapt)
void	steady_newton_solve (unsigned const &max_adapt=0)
void	copy (Problem *orig_problem_pt)
virtual Problem *	make_copy ()
virtual void	read (std::ifstream &restart_file, bool &unsteady_restart)
virtual void	read (std::ifstream &restart_file)
virtual void	dump (std::ofstream &dump_file) const
void	dump (const std::string &dump_file_name) const
void	delete_all_external_storage ()
virtual void	symmetrise_eigenfunction_for_adaptive_pitchfork_tracking ()
double *	bifurcation_parameter_pt () const
void	get_bifurcation_eigenfunction (Vector< DoubleVector > &eigenfunction)
void	activate_fold_tracking (double *const &parameter_pt, const bool &block_solve=true)
void	activate_bifurcation_tracking (double *const &parameter_pt, const DoubleVector &eigenvector, const bool &block_solve=true)
void	activate_bifurcation_tracking (double *const &parameter_pt, const DoubleVector &eigenvector, const DoubleVector &normalisation, const bool &block_solve=true)
void	activate_pitchfork_tracking (double *const &parameter_pt, const DoubleVector &symmetry_vector, const bool &block_solve=true)
void	activate_hopf_tracking (double *const &parameter_pt, const bool &block_solve=true)
void	activate_hopf_tracking (double *const &parameter_pt, const double &omega, const DoubleVector &null_real, const DoubleVector &null_imag, const bool &block_solve=true)
void	deactivate_bifurcation_tracking ()
void	reset_assembly_handler_to_default ()
	Reset the system to the standard non-augemented state. More...
double	arc_length_step_solve (double *const &parameter_pt, const double &ds, const unsigned &max_adapt=0)
double	arc_length_step_solve (Data *const &data_pt, const unsigned &data_index, const double &ds, const unsigned &max_adapt=0)
void	reset_arc_length_parameters ()
int &	sign_of_jacobian ()
void	explicit_timestep (const double &dt, const bool &shift_values=true)
	Take an explicit timestep of size dt. More...
void	unsteady_newton_solve (const double &dt)
void	unsteady_newton_solve (const double &dt, const bool &shift_values)
void	unsteady_newton_solve (const double &dt, const unsigned &max_adapt, const bool &first, const bool &shift=true)
double	doubly_adaptive_unsteady_newton_solve (const double &dt, const double &epsilon, const unsigned &max_adapt, const bool &first, const bool &shift=true)
double	doubly_adaptive_unsteady_newton_solve (const double &dt, const double &epsilon, const unsigned &max_adapt, const unsigned &suppress_resolve_after_spatial_adapt_flag, const bool &first, const bool &shift=true)
double	adaptive_unsteady_newton_solve (const double &dt_desired, const double &epsilon)
double	adaptive_unsteady_newton_solve (const double &dt_desired, const double &epsilon, const bool &shift_values)
void	assign_initial_values_impulsive ()
void	assign_initial_values_impulsive (const double &dt)
void	calculate_predictions ()
	Calculate predictions. More...
void	enable_mass_matrix_reuse ()
void	disable_mass_matrix_reuse ()
bool	mass_matrix_reuse_is_enabled ()
	Return whether the mass matrix is being reused. More...
void	refine_uniformly (const Vector< unsigned > &nrefine_for_mesh)
void	refine_uniformly (const Vector< unsigned > &nrefine_for_mesh, DocInfo &doc_info)
void	refine_uniformly_and_prune (const Vector< unsigned > &nrefine_for_mesh)
void	refine_uniformly_and_prune (const Vector< unsigned > &nrefine_for_mesh, DocInfo &doc_info)
void	refine_uniformly (DocInfo &doc_info)
void	refine_uniformly_and_prune (DocInfo &doc_info)
void	refine_uniformly ()
void	refine_uniformly (const unsigned &i_mesh, DocInfo &doc_info)
	Do uniform refinement for submesh i_mesh with documentation. More...
void	refine_uniformly (const unsigned &i_mesh)
	Do uniform refinement for submesh i_mesh without documentation. More...
void	p_refine_uniformly (const Vector< unsigned > &nrefine_for_mesh)
void	p_refine_uniformly (const Vector< unsigned > &nrefine_for_mesh, DocInfo &doc_info)
void	p_refine_uniformly_and_prune (const Vector< unsigned > &nrefine_for_mesh)
void	p_refine_uniformly_and_prune (const Vector< unsigned > &nrefine_for_mesh, DocInfo &doc_info)
void	p_refine_uniformly (DocInfo &doc_info)
void	p_refine_uniformly_and_prune (DocInfo &doc_info)
void	p_refine_uniformly ()
void	p_refine_uniformly (const unsigned &i_mesh, DocInfo &doc_info)
	Do uniform p-refinement for submesh i_mesh with documentation. More...
void	p_refine_uniformly (const unsigned &i_mesh)
	Do uniform p-refinement for submesh i_mesh without documentation. More...
void	refine_selected_elements (const Vector< unsigned > &elements_to_be_refined)
void	refine_selected_elements (const Vector< RefineableElement * > &elements_to_be_refined_pt)
void	refine_selected_elements (const unsigned &i_mesh, const Vector< unsigned > &elements_to_be_refined)
void	refine_selected_elements (const unsigned &i_mesh, const Vector< RefineableElement * > &elements_to_be_refined_pt)
void	refine_selected_elements (const Vector< Vector< unsigned >> &elements_to_be_refined)
void	refine_selected_elements (const Vector< Vector< RefineableElement * >> &elements_to_be_refined_pt)
void	p_refine_selected_elements (const Vector< unsigned > &elements_to_be_refined)
void	p_refine_selected_elements (const Vector< PRefineableElement * > &elements_to_be_refined_pt)
void	p_refine_selected_elements (const unsigned &i_mesh, const Vector< unsigned > &elements_to_be_refined)
void	p_refine_selected_elements (const unsigned &i_mesh, const Vector< PRefineableElement * > &elements_to_be_refined_pt)
void	p_refine_selected_elements (const Vector< Vector< unsigned >> &elements_to_be_refined)
void	p_refine_selected_elements (const Vector< Vector< PRefineableElement * >> &elements_to_be_refined_pt)
unsigned	unrefine_uniformly ()
unsigned	unrefine_uniformly (const unsigned &i_mesh)
void	p_unrefine_uniformly (DocInfo &doc_info)
void	p_unrefine_uniformly (const unsigned &i_mesh, DocInfo &doc_info)
	Do uniform p-unrefinement for submesh i_mesh without documentation. More...
void	adapt (unsigned &n_refined, unsigned &n_unrefined)
void	adapt ()
void	p_adapt (unsigned &n_refined, unsigned &n_unrefined)
void	p_adapt ()
void	adapt_based_on_error_estimates (unsigned &n_refined, unsigned &n_unrefined, Vector< Vector< double >> &elemental_error)
void	adapt_based_on_error_estimates (Vector< Vector< double >> &elemental_error)
void	get_all_error_estimates (Vector< Vector< double >> &elemental_error)
void	doc_errors (DocInfo &doc_info)
	Get max and min error for all elements in submeshes. More...
void	doc_errors ()
	Get max and min error for all elements in submeshes. More...
void	enable_info_in_newton_solve ()
void	disable_info_in_newton_solve ()
	Disable the output of information when in the newton solver. More...
Public Member Functions inherited from oomph::ExplicitTimeSteppableObject
	ExplicitTimeSteppableObject ()
	Empty constructor. More...
	ExplicitTimeSteppableObject (const ExplicitTimeSteppableObject &)=delete
	Broken copy constructor. More...
void	operator= (const ExplicitTimeSteppableObject &)=delete
	Broken assignment operator. More...
virtual	~ExplicitTimeSteppableObject ()
	Empty destructor. More...
virtual void	actions_before_explicit_stage ()
virtual void	actions_after_explicit_stage ()

Private Attributes
int	Sign
	The sign of the source function. More...

Additional Inherited Members
Public Types inherited from oomph::Problem
typedef void(*	SpatialErrorEstimatorFctPt) (Mesh *&mesh_pt, Vector< double > &elemental_error)
	Function pointer for spatial error estimator. More...
typedef void(*	SpatialErrorEstimatorWithDocFctPt) (Mesh *&mesh_pt, Vector< double > &elemental_error, DocInfo &doc_info)
	Function pointer for spatial error estimator with doc. More...
Public Attributes inherited from oomph::Problem
bool	Shut_up_in_newton_solve
Static Public Attributes inherited from oomph::Problem
static bool	Suppress_warning_about_actions_before_read_unstructured_meshes
Protected Types inherited from oomph::Problem
enum	Assembly_method {   Perform_assembly_using_vectors_of_pairs , Perform_assembly_using_two_vectors , Perform_assembly_using_maps , Perform_assembly_using_lists ,   Perform_assembly_using_two_arrays }
	Enumerated flags to determine which sparse assembly method is used. More...
Protected Member Functions inherited from oomph::Problem
unsigned	setup_element_count_per_dof ()
virtual void	sparse_assemble_row_or_column_compressed (Vector< int * > &column_or_row_index, Vector< int * > &row_or_column_start, Vector< double * > &value, Vector< unsigned > &nnz, Vector< double * > &residual, bool compressed_row_flag)
virtual void	actions_before_newton_convergence_check ()
virtual void	actions_before_newton_step ()
virtual void	actions_after_newton_step ()
virtual void	actions_before_implicit_timestep ()
virtual void	actions_after_implicit_timestep ()
virtual void	actions_after_implicit_timestep_and_error_estimation ()
virtual void	actions_before_explicit_timestep ()
	Actions that should be performed before each explicit time step. More...
virtual void	actions_after_explicit_timestep ()
	Actions that should be performed after each explicit time step. More...
virtual void	actions_before_read_unstructured_meshes ()
virtual void	actions_after_read_unstructured_meshes ()
virtual void	actions_after_change_in_global_parameter (double *const &parameter_pt)
virtual void	actions_after_change_in_bifurcation_parameter ()
virtual void	actions_after_parameter_increase (double *const &parameter_pt)
double &	dof_derivative (const unsigned &i)
double &	dof_current (const unsigned &i)
virtual void	set_initial_condition ()
virtual double	global_temporal_error_norm ()
unsigned	newton_solve_continuation (double *const &parameter_pt)
unsigned	newton_solve_continuation (double *const &parameter_pt, DoubleVector &z)
void	calculate_continuation_derivatives (double *const &parameter_pt)
void	calculate_continuation_derivatives (const DoubleVector &z)
void	calculate_continuation_derivatives_fd (double *const &parameter_pt)
bool	does_pointer_correspond_to_problem_data (double *const &parameter_pt)
void	set_consistent_pinned_values_for_continuation ()
Protected Attributes inherited from oomph::Problem
Vector< Problem * >	Copy_of_problem_pt
std::map< double *, bool >	Calculate_dparameter_analytic
bool	Calculate_hessian_products_analytic
LinearAlgebraDistribution *	Dof_distribution_pt
Vector< double * >	Dof_pt
	Vector of pointers to dofs. More...
DoubleVectorWithHaloEntries	Element_count_per_dof
double	Relaxation_factor
double	Newton_solver_tolerance
unsigned	Max_newton_iterations
	Maximum number of Newton iterations. More...
unsigned	Nnewton_iter_taken
Vector< double >	Max_res
	Maximum residuals at start and after each newton iteration. More...
double	Max_residuals
bool	Time_adaptive_newton_crash_on_solve_fail
bool	Jacobian_reuse_is_enabled
	Is re-use of Jacobian in Newton iteration enabled? Default: false. More...
bool	Jacobian_has_been_computed
bool	Problem_is_nonlinear
bool	Pause_at_end_of_sparse_assembly
bool	Doc_time_in_distribute
unsigned	Sparse_assembly_method
unsigned	Sparse_assemble_with_arrays_initial_allocation
unsigned	Sparse_assemble_with_arrays_allocation_increment
Vector< Vector< unsigned > >	Sparse_assemble_with_arrays_previous_allocation
double	Numerical_zero_for_sparse_assembly
double	FD_step_used_in_get_hessian_vector_products
bool	Mass_matrix_reuse_is_enabled
bool	Mass_matrix_has_been_computed
bool	Discontinuous_element_formulation
double	Minimum_dt
	Minimum desired dt: if dt falls below this value, exit. More...
double	Maximum_dt
	Maximum desired dt. More...
double	DTSF_max_increase
double	DTSF_min_decrease
double	Minimum_dt_but_still_proceed
bool	Scale_arc_length
	Boolean to control whether arc-length should be scaled. More...
double	Desired_proportion_of_arc_length
	Proportion of the arc-length to taken by the parameter. More...
double	Theta_squared
int	Sign_of_jacobian
	Storage for the sign of the global Jacobian. More...
double	Continuation_direction
double	Parameter_derivative
	Storage for the derivative of the global parameter wrt arc-length. More...
double	Parameter_current
	Storage for the present value of the global parameter. More...
bool	Use_continuation_timestepper
	Boolean to control original or new storage of dof stuff. More...
unsigned	Dof_derivative_offset
unsigned	Dof_current_offset
Vector< double >	Dof_derivative
	Storage for the derivative of the problem variables wrt arc-length. More...
Vector< double >	Dof_current
	Storage for the present values of the variables. More...
double	Ds_current
	Storage for the current step value. More...
unsigned	Desired_newton_iterations_ds
double	Minimum_ds
	Minimum desired value of arc-length. More...
bool	Bifurcation_detection
	Boolean to control bifurcation detection via determinant of Jacobian. More...
bool	Bisect_to_find_bifurcation
	Boolean to control wheter bisection is used to located bifurcation. More...
bool	First_jacobian_sign_change
	Boolean to indicate whether a sign change has occured in the Jacobian. More...
bool	Arc_length_step_taken
	Boolean to indicate whether an arc-length step has been taken. More...
bool	Use_finite_differences_for_continuation_derivatives
OomphCommunicator *	Communicator_pt
	The communicator for this problem. More...
bool	Always_take_one_newton_step
double	Timestep_reduction_factor_after_nonconvergence
bool	Keep_temporal_error_below_tolerance
Static Protected Attributes inherited from oomph::Problem
static ContinuationStorageScheme	Continuation_time_stepper
	Storage for the single static continuation timestorage object. More...

Detailed Description

Define the Problem which creates the mesh, applies the boundary conditions, and assigns equation numbers.

Constructor & Destructor Documentation

DemoPoissonProblem()

DemoPoissonProblem::DemoPoissonProblem ( const int &  sign = 1 )

inline

Problem constructor: Pass the sign of the source function (default is +1)

                                        : Sign(sign)
   {
    //Create a OneDimMesh Mesh object and set it to be the problem's mesh.
    //The element type, TwoNodePoissonElement, is passed  as a template 
    //parameter to the mesh. The argument to the constructor indicates
    //the number of elements in the mesh.
    Problem::mesh_pt() = new OneDimMesh<TwoNodePoissonElement>(10);
 
    //Pin the unknowns at the ends of the 1D domain:
    //The 1D mesh has 2 boundaries, each of which contains a single node;
    //the nodes on the boundary are available from Mesh::boundary_node_pt(...)
 
    //Pin the single nodal value at the single node on mesh 
    //boundary 0 (= the left domain boundary at x=0)
    mesh_pt()->boundary_node_pt(0,0)->pin(0);
 
    //Pin the single nodal value at the single node on mesh 
    //boundary 1 (= the right domain boundary at x=1)
    mesh_pt()->boundary_node_pt(1,0)->pin(0);
 
    // All values are initialised to zero. This is consistent with the
    // boundary condition at x=0 and no further action is required
    // at that node.
 
    // Apply the boundary condition at x=1: u(x=1)=-/+1
    mesh_pt()->boundary_node_pt(1,0)->set_value(0,-double(Sign));
 
    
    // Finish problem setup: Set the sign for the source function
    // in all elements
    
    //Find number of elements in mesh
    unsigned n_element = mesh_pt()->nelement();
    
    // Loop over the elements 
    for(unsigned i=0;i<n_element;i++)
     {
      // The sign() member function is defined in the 
      // TwoNodePoissonElement class not the base GeneralisedElement class.
      // In order to use it, we must
      // upcast from GeneralisedElement to the specific element type,
      // which is achieved by a C++ dynamic_cast.
      TwoNodePoissonElement *specific_element_pt 
       = dynamic_cast<TwoNodePoissonElement*>(mesh_pt()->element_pt(i));
      
      // Set the sign of the source function
      specific_element_pt->sign() = Sign;
     }
 
    //Assign the global and local equations numbers for the problem
    cout << "Number of equations is " << assign_eqn_numbers() << std::endl;
   }

References i, FishSolnOneDPoisson::Sign, and TwoNodePoissonElement::sign().

Member Function Documentation

actions_after_newton_solve()

void DemoPoissonProblem::actions_after_newton_solve ( )

inlinevirtual

Print out the result after the solve.

Reimplemented from oomph::Problem.

   {
    ofstream file ("result.dat");
    mesh_pt()->output(file);
   }

actions_before_newton_solve()

void DemoPoissonProblem::actions_before_newton_solve ( )

inlinevirtual

Check that everything has been set up properly.

Reimplemented from oomph::Problem.

   {
    if (0==self_test())
     {
      cout << "Problem has been set up correctly and can be solved." 
           << std::endl;
     }
    else
     {
      throw 
       OomphLibError("Trouble! Check error messages and fix the problems.\n",
                     "DemoPoissonProblem::actions_before_newton_solve()",
                     OOMPH_EXCEPTION_LOCATION);
     }
   }

References OOMPH_EXCEPTION_LOCATION, and oomph::self_test().

Member Data Documentation

Sign

int DemoPoissonProblem::Sign

private

The sign of the source function.

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

• one_d_poisson_generic_only.cc