TimeDiscr Class Reference

#include <timeDiscr.h>

Public Member Functions
	TimeDiscr ()
	~TimeDiscr ()
void	AllocateMemory (int nNodes)
void	DensityChange (const Geometry &geometry, const FluidProps &fluidProps, REAL &drho, REAL &drmax, int &idrmax) const
void	Irsmoo (const Geometry &geometry, SpaceDiscr &spaceDiscr)
void	Solve (const Geometry &geometry, FluidProps &fluidProps, BndConds &bndConds, SpaceDiscr &spaceDiscr, const Precond &precond)
void	TimeStep (const Geometry &geometry, const FluidProps &fluidProps, const Precond &precond, int order)

Public Attributes
TimeStepping	timeStepping
int	nIterIrs
int	nrk
bool	dissipOn [5]
REAL	cfl
REAL	epsIrs
REAL	ark [5]
REAL	betrk [5]

Detailed Description

Encompasses data and functions related to temporal discretization of the governing equations (time stepping).

Constructor & Destructor Documentation

TimeDiscr::TimeDiscr

(

)

Initializes data of temporal discretization.

TimeDiscr::~TimeDiscr

(

)

Finishes and cleans up the memory.

Member Function Documentation

void TimeDiscr::AllocateMemory

(

int

nNodes

)

Allocates all necessary memory.

Parameters

nNodes

total number of grid nodes

Exceptions

std::bad_alloc

failed memory allocation

void TimeDiscr::DensityChange	(	const Geometry &	geometry,
		const FluidProps &	fluidProps,
		REAL &	drho,
		REAL &	drmax,
		int &	idrmax
	)		const

Computes of the 2-norm of the density change (density residual).

Parameters

geometry	geometrical data
fluidProps	fluid properties
drho	change of the density residual (2-norm)
drmax	maximum change of the density residual
idrmax	index of the node with the largest residual

void TimeDiscr::Irsmoo	(	const Geometry &	geometry,
		SpaceDiscr &	spaceDiscr
	)

Applies the central implicit smoothing method to the residuals by using Jacobi iteration.

Parameters

geometry	geometrical data
spaceDiscr	spatial discretization

void TimeDiscr::Solve	(	const Geometry &	geometry,
		FluidProps &	fluidProps,
		BndConds &	bndConds,
		SpaceDiscr &	spaceDiscr,
		const Precond &	precond
	)

Integrates the four basic equations (continuity, momentum and energy) by the explicit, multi-stage (Runge-Kutta) time-stepping scheme.

Parameters

geometry	geometrical data
fluidProps	fluid properties
bndConds	boundary conditions
spaceDiscr	spatial discretization
precond	low Mach-number preconditioning

void TimeDiscr::TimeStep	(	const Geometry &	geometry,
		const FluidProps &	fluidProps,
		const Precond &	precond,
		int	order
	)

Computes the maximum stable time step.

Parameters

geometry	geometrical data
fluidProps	fluid properties
precond	low Mach-number preconditioning
order	order of the spatial discretization (1 or 2)

Member Data Documentation

REAL TimeDiscr::ark[5]

stage coefficients

REAL TimeDiscr::betrk[5]

dissipation-blending coefficients

REAL TimeDiscr::cfl

CFL-number

bool TimeDiscr::dissipOn[5]

dissipation evaluation per stage (0=no, 1=yes)

REAL TimeDiscr::epsIrs

coefficient of implicit residual smoothing

int TimeDiscr::nIterIrs

number of Jacobi iterations (implicit residual smoothing)

int TimeDiscr::nrk

number of stages (Runge-Kutta scheme); max. = 5

TimeStepping TimeDiscr::timeStepping

switch between local and global time-stepping

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

• timeDiscr.h
• densityChange.cpp
• irsmoo.cpp
• solve.cpp
• timeDiscr.cpp
• timeStep.cpp