SplitSolver Class Reference

Implements operator split integration for reacting flow problems. More...

#include <splitSolver.h>

Inheritance diagram for SplitSolver:

Public Member Functions
	SplitSolver ()
virtual	~SplitSolver ()
void	setOptions (const ConfigOptions &_options)
	Set configuration options needed by the solver.
void	resize (index_t nRows, index_t nCols)
	Set the size of all internal arrays when the problem size changes.
void	calculateTimeDerivatives (double dt)
	Compute estimated time derivatives for each split term based on deltas for each integrator phase.
int	step ()
	Take one global timestep.
virtual void	setupStep ()=0
	Take actions at the start of the time step.
virtual int	finishStep ()=0
	Take actions at the end of a time step.
virtual void	prepareIntegrators ()=0
	Prepare split term integrators.
void	integrateSplitTerms (double t, double dt)
	Take one global timestep by integrating the split terms and computing the deltas for each integrator phase.
virtual void	writeStateFile (const std::string &fileName="", bool errorFile=false, bool updateDerivatives=true)
	Create prof.h5 file.
Balanced Strang-split Integration Terms
These functions should be overloaded by derived classes to implement the integration of the split terms.
virtual void	integrateConvectionTerms ()=0
virtual void	integrateProductionTerms ()=0
virtual void	integrateDiffusionTerms ()=0

Public Attributes
dmatrix	state
	Current state.
dmatrix	startState
	State at the start of the current integrator stage.
dmatrix	deltaConv
	Change in state due to convection terms during the current time step.
dmatrix	deltaDiff
	Change in state due to diffusion terms during the current time step.
dmatrix	deltaProd
	Change in state due to production terms during the current time step.
dmatrix	ddtConv
	Estimated time derivatives of convection terms, based on the deltaConv of the previous time step.
dmatrix	ddtDiff
	Estimated time derivatives of the diffusion terms, based on the deltaDiff of the previous time step.
dmatrix	ddtProd
	Estimated time derivatives of production terms, based on the deltaProd of the previous time step.
dmatrix	ddtCross
	Time derivative associated with terms taken as constant over a time step.
dmatrix	splitConstConv
	Splitting constants for the convection terms.
dmatrix	splitConstDiff
	Splitting constants for the diffusion terms.
dmatrix	splitConstProd
	Splitting constants for the production terms.
PerfTimer	splitTimer
	Timer for amount of time used by splitting procedure.
ConfigOptions	options
	Options read from the input file.
double	tStart
	Integrator start time.
double	tEnd
	Integrator termination time (upper bound)
double	tNow
	Current time reached by the integrator.
double	tStageStart
	Start time for the active integrator stage.
double	tStageEnd
	End time for the active integrator stage.
double	t
	start time of the current global timestep
double	dt
	Global timestep used by the split solver.

Private Member Functions
Internal methods for each stages
These methods do the neccessary actions before and after each split integration stage.
void	_integrateConvectionTerms (double tStart, double tEnd, int stage)
void	_integrateProductionTerms (double tStart, double tEnd, int stage)
void	_integrateDiffusionTerms (double tStart, double tEnd, int stage)

Private Attributes
bool	useBalancedSplitting
	'true' to use rebalanced splitting, 'false' to use regular Strang splitting

Detailed Description

Implements operator split integration for reacting flow problems.

Solves systems of equations with convection, reaction, and diffusion terms using either Strang splitting or rebalanced splitting.

Constructor & Destructor Documentation

SplitSolver()

SplitSolver::SplitSolver ( )

inline

~SplitSolver()

virtual SplitSolver::~SplitSolver ( )

inlinevirtual

Member Function Documentation

setOptions()

void SplitSolver::setOptions

(

const ConfigOptions &

_options

)

Set configuration options needed by the solver.

resize()

void SplitSolver::resize	(	index_t	nRows,
		index_t	nCols
	)

Set the size of all internal arrays when the problem size changes.

calculateTimeDerivatives()

void SplitSolver::calculateTimeDerivatives

(

double

dt

)

Compute estimated time derivatives for each split term based on deltas for each integrator phase.

step()

int SplitSolver::step

(

)

Take one global timestep.

setupStep()

virtual void SplitSolver::setupStep ( )

pure virtual

Take actions at the start of the time step.

Used by derived classes to perform actions that need to be done at the start of a time step, before the splitting constants are computed.

Implemented in FlameSolver.

finishStep()

virtual int SplitSolver::finishStep ( )

pure virtual

Take actions at the end of a time step.

Used by derived classes to perform any actions that need to be done at the end of the time step, after the time derivatives have been calculated based on the results of integrating the split equations.

Implemented in FlameSolver.

prepareIntegrators()

virtual void SplitSolver::prepareIntegrators ( )

pure virtual

Prepare split term integrators.

Used by derived classes to assign split constants to the integrators for the individual terms and perform any other actions that should take place

Implemented in FlameSolver.

integrateSplitTerms()

void SplitSolver::integrateSplitTerms	(	double	t,
		double	dt
	)

Take one global timestep by integrating the split terms and computing the deltas for each integrator phase.

integrateConvectionTerms()

virtual void SplitSolver::integrateConvectionTerms ( )

pure virtual

Implemented in FlameSolver.

integrateProductionTerms()

virtual void SplitSolver::integrateProductionTerms ( )

pure virtual

Implemented in FlameSolver.

integrateDiffusionTerms()

virtual void SplitSolver::integrateDiffusionTerms ( )

pure virtual

Implemented in FlameSolver.

writeStateFile()

virtual void SplitSolver::writeStateFile ( const std::string &  fileName = "", bool  errorFile = false, bool  updateDerivatives = true  )

inlinevirtual

Create prof.h5 file.

Parameters

fileName	The name of the output file.
errorFile	Setting this to 'true' will generate a more verbose output file
updateDerivatives	Setting this to 'true' will compute time derivatives based on the current state. This flag should only set if all of the solvers and auxillary arrays are sized corresponding to the current state, e.g. after integration but but before regridding.

Reimplemented in FlameSolver.

_integrateConvectionTerms()

void SplitSolver::_integrateConvectionTerms ( double  tStart, double  tEnd, int  stage  )

private

_integrateProductionTerms()

void SplitSolver::_integrateProductionTerms ( double  tStart, double  tEnd, int  stage  )

private

_integrateDiffusionTerms()

void SplitSolver::_integrateDiffusionTerms ( double  tStart, double  tEnd, int  stage  )

private

Member Data Documentation

state

dmatrix SplitSolver::state

Current state.

startState

dmatrix SplitSolver::startState

State at the start of the current integrator stage.

deltaConv

dmatrix SplitSolver::deltaConv

Change in state due to convection terms during the current time step.

deltaDiff

dmatrix SplitSolver::deltaDiff

Change in state due to diffusion terms during the current time step.

deltaProd

dmatrix SplitSolver::deltaProd

Change in state due to production terms during the current time step.

ddtConv

dmatrix SplitSolver::ddtConv

Estimated time derivatives of convection terms, based on the deltaConv of the previous time step.

ddtDiff

dmatrix SplitSolver::ddtDiff

Estimated time derivatives of the diffusion terms, based on the deltaDiff of the previous time step.

ddtProd

dmatrix SplitSolver::ddtProd

Estimated time derivatives of production terms, based on the deltaProd of the previous time step.

ddtCross

dmatrix SplitSolver::ddtCross

Time derivative associated with terms taken as constant over a time step.

These terms are held constant because they depend on state variables that cross the split dimensions, e.g. Soret mass fluxes.

splitConstConv

dmatrix SplitSolver::splitConstConv

Splitting constants for the convection terms.

splitConstDiff

dmatrix SplitSolver::splitConstDiff

Splitting constants for the diffusion terms.

splitConstProd

dmatrix SplitSolver::splitConstProd

Splitting constants for the production terms.

splitTimer

PerfTimer SplitSolver::splitTimer

Timer for amount of time used by splitting procedure.

options

ConfigOptions SplitSolver::options

Options read from the input file.

tStart

double SplitSolver::tStart

Integrator start time.

tEnd

double SplitSolver::tEnd

Integrator termination time (upper bound)

tNow

double SplitSolver::tNow

Current time reached by the integrator.

tStageStart

double SplitSolver::tStageStart

Start time for the active integrator stage.

tStageEnd

double SplitSolver::tStageEnd

End time for the active integrator stage.

t

double SplitSolver::t

start time of the current global timestep

dt

double SplitSolver::dt

Global timestep used by the split solver.

useBalancedSplitting

bool SplitSolver::useBalancedSplitting

private

'true' to use rebalanced splitting, 'false' to use regular Strang splitting

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

• src/splitSolver.h
• src/splitSolver.cpp