plb::IsoThermalBulkDynamics< T, Descriptor > Class Template Reference

Common base iso-thermal (or athermal) bulk dynamics. More...

#include <isoThermalDynamics.h>

Inheritance diagram for plb::IsoThermalBulkDynamics< T, Descriptor >:

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Collaboration diagram for plb::IsoThermalBulkDynamics< T, Descriptor >:

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List of all members.

Public Member Functions
	IsoThermalBulkDynamics (T omega_)
virtual void	regularize (Cell< T, Descriptor > &cell, T rhoBar, Array< T, Descriptor< T >::d > const &j, T jSqr, Array< T, SymmetricTensor< T, Descriptor >::n > const &PiNeq, T thetaBar=T()) const
	Re-compute particle populations from the leading moments.
virtual T	computeTemperature (Cell< T, Descriptor > const &cell) const
	Returns 1, as a default value for isothermal flow.
virtual void	computeDeviatoricStress (Cell< T, Descriptor > const &cell, Array< T, SymmetricTensor< T, Descriptor >::n > &PiNeq) const
	Compute the deviatoric stress tensor ("off-equilibrium part of Pi").
virtual void	computeHeatFlux (Cell< T, Descriptor > const &cell, Array< T, Descriptor< T >::d > &q) const
	Returns 0, as a default value for isothermal flow.
virtual plint	numDecomposedVariables (plint order) const
	Number of variables required to decompose a population representation into moments.
virtual void	decompose (Cell< T, Descriptor > const &cell, std::vector< T > &rawData, plint order) const
	Decompose from population representation into moment representation.
virtual void	recompose (Cell< T, Descriptor > &cell, std::vector< T > const &rawData, plint order) const
	Recompose from moment representation to population representation.
virtual void	rescale (std::vector< T > &rawData, T xDxInv, T xDt, plint order) const
	Change the space and time scales of the variables in moment representation.
virtual void	rescale (int dxScale, int dtScale)
	Adapt internal variables to a new grid level.
virtual T	computeEbar (Cell< T, Descriptor > const &cell) const
	Returns 0, as a default value for isothermal flow.

Detailed Description

template<typename T, template< typename U > class Descriptor>
class plb::IsoThermalBulkDynamics< T, Descriptor >

Common base iso-thermal (or athermal) bulk dynamics.

Constructor & Destructor Documentation

template<typename T , template< typename U > class Descriptor>

plb::IsoThermalBulkDynamics< T, Descriptor >::IsoThermalBulkDynamics ( T omega_ ) [inline]

Member Function Documentation

template<typename T , template< typename U > class Descriptor>

void plb::IsoThermalBulkDynamics< T, Descriptor >::computeDeviatoricStress	(	Cell< T, Descriptor > const &	cell,
		Array< T, SymmetricTensor< T, Descriptor >::n > &	PiNeq
	)			const `[inline, virtual]`

Compute the deviatoric stress tensor ("off-equilibrium part of Pi").

Reimplemented from plb::BasicBulkDynamics< T, Descriptor >.

References plb::flatWall::compute_PiNeq().

template<typename T , template< typename U > class Descriptor>

T plb::IsoThermalBulkDynamics< T, Descriptor >::computeEbar ( Cell< T, Descriptor > const & cell ) const [inline, virtual]

Returns 0, as a default value for isothermal flow.

Reimplemented from plb::BasicBulkDynamics< T, Descriptor >.

template<typename T , template< typename U > class Descriptor>

void plb::IsoThermalBulkDynamics< T, Descriptor >::computeHeatFlux	(	Cell< T, Descriptor > const &	cell,
		Array< T, Descriptor< T >::d > &	q
	)			const `[inline, virtual]`

Returns 0, as a default value for isothermal flow.

Reimplemented from plb::BasicBulkDynamics< T, Descriptor >.

template<typename T , template< typename U > class Descriptor>

T plb::IsoThermalBulkDynamics< T, Descriptor >::computeTemperature ( Cell< T, Descriptor > const & cell ) const [inline, virtual]

Returns 1, as a default value for isothermal flow.

Reimplemented from plb::BasicBulkDynamics< T, Descriptor >.

template<typename T , template< typename U > class Descriptor>

void plb::IsoThermalBulkDynamics< T, Descriptor >::decompose	(	Cell< T, Descriptor > const &	cell,
		std::vector< T > &	rawData,
		plint	order
	)			const `[inline, virtual]`

Decompose from population representation into moment representation.

See also:: numDecomposedVariables()

Implements plb::Dynamics< T, Descriptor >.

References plb::IsoThermalBulkDynamics< T, Descriptor >::numDecomposedVariables().

template<typename T , template< typename U > class Descriptor>

plint plb::IsoThermalBulkDynamics< T, Descriptor >::numDecomposedVariables ( plint order ) const [inline, virtual]

Number of variables required to decompose a population representation into moments.

In the present implementation, the decomposition is carried out up to order-1 in the Chapman-Enskog expansion. Example: Take the D2Q9 lattice. A decomposition means:

At order 0: Decompose into rho, u, and fNeq (1+2+9=12 variables)
At order 1: Decompose into rho, u, and PiNeq (1+2+3=6 variables)
At higher order: Decompose according to order 1.

Implements plb::Dynamics< T, Descriptor >.

Referenced by plb::IsoThermalBulkDynamics< T, Descriptor >::decompose(), plb::IsoThermalBulkDynamics< T, Descriptor >::recompose(), and plb::IsoThermalBulkDynamics< T, Descriptor >::rescale().

template<typename T , template< typename U > class Descriptor>

void plb::IsoThermalBulkDynamics< T, Descriptor >::recompose	(	Cell< T, Descriptor > &	cell,
		std::vector< T > const &	rawData,
		plint	order
	)			const `[inline, virtual]`

Recompose from moment representation to population representation.

See also:: numDecomposedVariables() This process is also known as "regularization step", and this function is therefore equivalent to regularize(), although one or the other function may be more useful in a specific context, due to the form of the parameters.

Implements plb::Dynamics< T, Descriptor >.

References plb::IsoThermalBulkDynamics< T, Descriptor >::numDecomposedVariables(), and PLB_PRECONDITION.

template<typename T , template< typename U > class Descriptor>

void plb::IsoThermalBulkDynamics< T, Descriptor >::regularize	(	Cell< T, Descriptor > &	cell,
		T	rhoBar,
		Array< T, Descriptor< T >::d > const &	j,
		T	jSqr,
		Array< T, SymmetricTensor< T, Descriptor >::n > const &	PiNeq,
		T	thetaBar = `T()`
	)			const `[inline, virtual]`

Re-compute particle populations from the leading moments.

Implements plb::Dynamics< T, Descriptor >.

References plb::Dynamics< T, Descriptor >::computeEquilibrium().

template<typename T , template< typename U > class Descriptor>

virtual void plb::IsoThermalBulkDynamics< T, Descriptor >::rescale	(	int	dxScale,
		int	dtScale
	)			`[inline, virtual]`

Adapt internal variables to a new grid level.

In the default implementation, only omega is rescaled.

Reimplemented from plb::Dynamics< T, Descriptor >.

References plb::IsoThermalBulkDynamics< T, Descriptor >::rescale().

template<typename T , template< typename U > class Descriptor>

void plb::IsoThermalBulkDynamics< T, Descriptor >::rescale	(	std::vector< T > &	rawData,
		T	xDxInv,
		T	xDt,
		plint	order
	)			const `[inline, virtual]`

Change the space and time scales of the variables in moment representation.

See also:: numDecomposedVariables()

Parameters:

	xDxInv	Inverse of the factor by which space scale is multiplied.
	xDt	Factor by which time scale is multiplied.

Implements plb::Dynamics< T, Descriptor >.

References plb::IsoThermalBulkDynamics< T, Descriptor >::numDecomposedVariables(), and PLB_PRECONDITION.

Referenced by plb::IsoThermalBulkDynamics< T, Descriptor >::rescale().

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

plb::IsoThermalBulkDynamics< T, Descriptor > Class Template Reference

Public Member Functions

Detailed Description

template<typename T, template< typename U > class Descriptor> class plb::IsoThermalBulkDynamics< T, Descriptor >

Constructor & Destructor Documentation

Member Function Documentation

template<typename T, template< typename U > class Descriptor>
class plb::IsoThermalBulkDynamics< T, Descriptor >