NLTimeAssemble< T > Class Template Reference

Base class for non-linear time-dependent discretizations. More...

#include <NLTimeStep.hpp>

Inheritance diagram for NLTimeAssemble< T >:

[legend]Collaboration diagram for NLTimeAssemble< T >:

[legend]List of all members.

Public Member Functions
virtual void	PrintParam ()=0
	Prints parameters of the discretization.
virtual void	PreProcess (GridVec< T > &u, SysMatrix< T > &J)
	Prepares the assembling procedure for a given matrix hierarchy and the grid-function sizes.
virtual void	Defect (double delta_t, GridVec< T > &u, GridVec< T > &d, T s_a)=0
	Computes the non-linear defect for a given guess.
virtual bool	Jacobian (double delta_t, GridVec< T > &u, SysMatrix< T > &J, T s_a)=0
	Computes the Jacobian (for all the matrices in the hierarchy) of the system or its approximation at a given guess.
virtual void	PostProcess ()
	Releases the memory, etc.
virtual	~NLTimeAssemble ()
	Virtual destructor.

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Detailed Description

template<typename T>
class NLTimeAssemble< T >

Base class for non-linear time-dependent discretizations.

This is a base class for discretizations of time-dependent problems for which the computation of the solution on the new time level cannot be reduced to solving a linear problem. (Else you can use LinTimeAssemble<T>.) This class declares the pure virtual functions for the computation of the defect and the Jacobian of the non-linear system for the grid function on the new time step.

Note:

The template depends on a type T. This type should satisfy the conditions listed in small_matrix.hpp for small matrices.

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Constructor & Destructor Documentation

template<typename T>

virtual NLTimeAssemble< T >::~NLTimeAssemble

(

)

[inline, virtual]

Virtual destructor.

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Member Function Documentation

template<typename T>

virtual void NLTimeAssemble< T >::PrintParam

(

)

[pure virtual]

Prints parameters of the discretization.

Implemented in NLTGlobalAssemble< T >.

template<typename T>

virtual void NLTimeAssemble< T >::PreProcess	(	GridVec< T > &	u,
		SysMatrix< T > &	J
	)			[inline, virtual]

Prepares the assembling procedure for a given matrix hierarchy and the grid-function sizes.

Note:

Only the sizes of 'u' and 'J', not the values, may be used.

Parameters:

[in]	u	A vector for the guess on a time level
[in]	J	The matrix hierarchy for the Jacobian

Reimplemented in NLTGlobalAssemble< T >.

template<typename T>

virtual void NLTimeAssemble< T >::Defect	(	double	delta_t,
		GridVec< T > &	u,
		GridVec< T > &	d,
		T	s_a
	)			[pure virtual]

Computes the non-linear defect for a given guess.

Parameters:

[in]	delta_t	The time step
[in]	u	The guess to compute the defect at
[in]	d	For the defect on the new time level
[in]	s_a	The factor for the stiffness part (that for the mass part is 1)

Implemented in NLTGlobalAssemble< T >.

template<typename T>

virtual bool NLTimeAssemble< T >::Jacobian	(	double	delta_t,
		GridVec< T > &	u,
		SysMatrix< T > &	J,
		T	s_a
	)			[pure virtual]

Computes the Jacobian (for all the matrices in the hierarchy) of the system or its approximation at a given guess.

This function should return true if the Jacobian does not exist for this guess, or the approximation cannot be computed. Otherwise the function should return false.

Parameters:

[in]	delta_t	The time step
[in]	u	The guess to compute the Jacobian at
[in]	J	For the Jacobian on the new time level
[in]	s_a	The factor for the stiffness matrix (that for the mass matrix is 1)

Implemented in NLTGlobalAssemble< T >.

template<typename T>

virtual void NLTimeAssemble< T >::PostProcess

(

)

[inline, virtual]

Releases the memory, etc.

Reimplemented in NLTGlobalAssemble< T >.

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

• NLTimeStep.hpp

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