A class that is used to define the functions used to assemble and invert the mass matrix when taking an explicit timestep. The idea is simply to replace the jacobian matrix with the mass matrix and then our standard linear solvers will solve the required system. More...

#include <assembly_handler.h>

Inheritance diagram for oomph::ExplicitTimeStepHandler:

Public Member Functions
	ExplicitTimeStepHandler ()
	Empty Constructor. More...

unsigned	ndof (GeneralisedElement *const &elem_pt)
	Return the number of degrees of freedom in the element elem_pt. More...

unsigned long	eqn_number (GeneralisedElement *const &elem_pt, const unsigned &ieqn_local)
	Return the global equation number of the local unknown ieqn_local in elem_pt. More...

void	get_residuals (GeneralisedElement *const &elem_pt, Vector< double > &residuals)
	Return the contribution to the residuals of the element elem_pt This is deliberately broken in our eigenproblem. More...

void	get_jacobian (GeneralisedElement *const &elem_pt, Vector< double > &residuals, DenseMatrix< double > &jacobian)
	Calculate the elemental Jacobian matrix "d equation / d variable" for elem_pt. Again deliberately broken in the eigenproblem. More...

void	get_all_vectors_and_matrices (GeneralisedElement *const &elem_pt, Vector< Vector< double >> &vec, Vector< DenseMatrix< double >> &matrix)
	Calculate all desired vectors and matrices provided by the element elem_pt. More...

	~ExplicitTimeStepHandler ()
	Empty virtual destructor. More...

Public Member Functions inherited from oomph::AssemblyHandler
	AssemblyHandler ()
	Empty constructor. More...

virtual void	dof_vector (GeneralisedElement *const &elem_pt, const unsigned &t, Vector< double > &dof)
	Return vector of dofs at time level t in the element elem_pt. More...

virtual void	dof_pt_vector (GeneralisedElement const &elem_pt, Vector< double > &dof_pt)
	Return vector of pointers to dofs in the element elem_pt. More...

virtual double &	local_problem_dof (Problem *const &problem_pt, const unsigned &t, const unsigned &i)
	Return the t-th level of storage associated with the i-th (local) dof stored in the problem. More...

virtual void	get_dresiduals_dparameter (GeneralisedElement const &elem_pt, double const &parameter_pt, Vector< double > &dres_dparam)
	Calculate the derivative of the residuals with respect to a parameter. More...

virtual void	get_djacobian_dparameter (GeneralisedElement const &elem_pt, double const &parameter_pt, Vector< double > &dres_dparam, DenseMatrix< double > &djac_dparam)
	Calculate the derivative of the residuals and jacobian with respect to a parameter. More...

virtual void	get_hessian_vector_products (GeneralisedElement *const &elem_pt, Vector< double > const &Y, DenseMatrix< double > const &C, DenseMatrix< double > &product)
	Calculate the product of the Hessian (derivative of Jacobian with respect to all variables) an eigenvector, Y, and other specified vectors, C (d(J_{ij})/d u_{k}) Y_{j} C_{k}. More...

virtual int	bifurcation_type () const
	Return an unsigned integer to indicate whether the handler is a bifurcation tracking handler. The default is zero (not) More...

virtual double *	bifurcation_parameter_pt () const
	Return a pointer to the bifurcation parameter in bifurcation tracking problems. More...

virtual void	get_eigenfunction (Vector< DoubleVector > &eigenfunction)
	Return the eigenfunction(s) associated with the bifurcation that has been detected in bifurcation tracking problems. More...

virtual void	get_inner_products (GeneralisedElement *const &elem_pt, Vector< std::pair< unsigned, unsigned >> const &history_index, Vector< double > &inner_product)
	Compute the inner products of the given vector of pairs of history values over the element. More...

virtual void	get_inner_product_vectors (GeneralisedElement *const &elem_pt, Vector< unsigned > const &history_index, Vector< Vector< double >> &inner_product_vector)
	Compute the vectors that when taken as a dot product with other history values give the inner product over the element. More...

virtual void	synchronise ()
	Function that is used to perform any synchronisation required during the solution. More...

virtual	~AssemblyHandler ()
	Empty virtual destructor. More...

Detailed Description

A class that is used to define the functions used to assemble and invert the mass matrix when taking an explicit timestep. The idea is simply to replace the jacobian matrix with the mass matrix and then our standard linear solvers will solve the required system.

Definition at line 180 of file assembly_handler.h.

Constructor & Destructor Documentation

◆ ExplicitTimeStepHandler()

oomph::ExplicitTimeStepHandler::ExplicitTimeStepHandler ( )

inline

Empty Constructor.

Definition at line 184 of file assembly_handler.h.

◆ ~ExplicitTimeStepHandler()

oomph::ExplicitTimeStepHandler::~ExplicitTimeStepHandler ( )

inline

Empty virtual destructor.

Definition at line 212 of file assembly_handler.h.

Member Function Documentation

◆ eqn_number()

unsigned long oomph::ExplicitTimeStepHandler::eqn_number	(	GeneralisedElement *const &	elem_pt,
		const unsigned &	ieqn_local
	)

virtual

Return the global equation number of the local unknown ieqn_local in elem_pt.

Get the global equation number of the local unknown. Direct call to the function in the element.

Reimplemented from oomph::AssemblyHandler.

Definition at line 248 of file assembly_handler.cc.

References oomph::GeneralisedElement::eqn_number().

◆ get_all_vectors_and_matrices()

void oomph::ExplicitTimeStepHandler::get_all_vectors_and_matrices	(	GeneralisedElement *const &	elem_pt,
		Vector< Vector< double >> &	vec,
		Vector< DenseMatrix< double >> &	matrix
	)

virtual

Calculate all desired vectors and matrices provided by the element elem_pt.

Calculate all desired vectors and matrices that are required by the problem by calling those of the underlying element.

Reimplemented from oomph::AssemblyHandler.

Definition at line 278 of file assembly_handler.cc.

References oomph::GeneralisedElement::get_mass_matrix().

◆ get_jacobian()

void oomph::ExplicitTimeStepHandler::get_jacobian	(	GeneralisedElement *const &	elem_pt,
		Vector< double > &	residuals,
		DenseMatrix< double > &	jacobian
	)