Opm::PIDAndIterationCountTimeStepControl Class Reference

PID controller based adaptive time step control as above that also takes target iterations into account. More...

#include <TimeStepControl.hpp>

Inheritance diagram for Opm::PIDAndIterationCountTimeStepControl:

Public Member Functions
	PIDAndIterationCountTimeStepControl (const int target_iterations, const double decayDampingFactor, const double growthDampingFactor, const double tol, const double minTimeStepBasedOnIterations, const bool verbose)
	constructor
double	computeTimeStepSize (const double dt, const int iterations, const RelativeChangeInterface &relativeChange, const AdaptiveSimulatorTimer &) const override
	compute new time step size suggestions based on the PID controller
bool	timeStepAccepted (const double, const double) const override
	For the general 3rd order controller, the internal shifting of errors and time steps happens here, and hence this method needs to be called for (after) each time step.
template<class Serializer>
void	serializeOp (Serializer &serializer)
bool	operator== (const PIDAndIterationCountTimeStepControl &) const
Public Member Functions inherited from Opm::PIDTimeStepControl
	PIDTimeStepControl (const double tol, const bool verbose)
	constructor
double	computeTimeStepSize (const double dt, const int, const RelativeChangeInterface &relativeChange, const AdaptiveSimulatorTimer &) const override
	compute new time step size suggestions based on the PID controller
bool	timeStepAccepted (const double, const double) const override
	For the general 3rd order controller, the internal shifting of errors and time steps happens here, and hence this method needs to be called for (after) each time step.
template<class Serializer>
void	serializeOp (Serializer &serializer)
bool	operator== (const PIDTimeStepControl &) const
Public Member Functions inherited from Opm::TimeStepControlInterface
virtual	~TimeStepControlInterface ()
	virtual destructor (empty)

Static Public Member Functions
static PIDAndIterationCountTimeStepControl	serializationTestObject ()
Static Public Member Functions inherited from Opm::PIDTimeStepControl
static PIDTimeStepControl	serializationTestObject ()

Static Public Attributes
static constexpr TimeStepControlType	Type = TimeStepControlType::PIDAndIterationCount
Static Public Attributes inherited from Opm::PIDTimeStepControl
static constexpr TimeStepControlType	Type = TimeStepControlType::PID

Protected Attributes
const int	target_iterations_ = 8
const double	decayDampingFactor_ = 1.0
const double	growthDampingFactor_ = 3.2
const double	minTimeStepBasedOnIterations_ = 0.0
const bool	verbose_ = false
Protected Attributes inherited from Opm::PIDTimeStepControl
const double	tol_ = 0.1
std::vector< double >	errors_ {}
const bool	verbose_ = false

Detailed Description

PID controller based adaptive time step control as above that also takes target iterations into account.

Constructor & Destructor Documentation

PIDAndIterationCountTimeStepControl()

Opm::PIDAndIterationCountTimeStepControl::PIDAndIterationCountTimeStepControl	(	const int	target_iterations,
		const double	decayDampingFactor,
		const double	growthDampingFactor,
		const double	tol,
		const double	minTimeStepBasedOnIterations,
		const bool	verbose )

constructor

Parameters

target_iterations	number of desired iterations per time step
decayDampingFactor	limiting the decrease in time step if iteration count was high
growthDampingFactor	limiting the increase in time step if iteration count was low
tol	tolerance for the relative changes of the numerical solution to be accepted in one time step
minTimeStepBasedOnIterations	time step suggestion from target iterations should not be below this
verbose	if true, get some output

Member Function Documentation

computeTimeStepSize()

double Opm::PIDAndIterationCountTimeStepControl::computeTimeStepSize ( const double dt, const int iterations, const RelativeChangeInterface & relativeChange, const AdaptiveSimulatorTimer & substepTimer ) const

overridevirtual

compute new time step size suggestions based on the PID controller

Parameters

dt	time step size used in the current step
iterations	number of iterations used (linear/nonlinear)
relativeChange	Relative change handler
substepTimer	Sub step timer

Returns

suggested time step size for the next step

Parameters

dt	Time step length
iterations	Number of iterations used
relativeChange	Relative change handler

Implements Opm::TimeStepControlInterface.

timeStepAccepted()

bool Opm::PIDAndIterationCountTimeStepControl::timeStepAccepted ( const double error, const double timeStepJustCompleted ) const

inlineoverridevirtual

For the general 3rd order controller, the internal shifting of errors and time steps happens here, and hence this method needs to be called for (after) each time step.

Implements Opm::TimeStepControlInterface.

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

• opm/simulators/timestepping/TimeStepControl.hpp
• opm/simulators/timestepping/TimeStepControl.cpp