Implementation of TimeStepper for solving electrostatic problems. The template parameter is the FieldSolver implementation type. More...

#include <CD_FieldStepper.H>

Inheritance diagram for Physics::Electrostatics::FieldStepper< T >:

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Collaboration diagram for Physics::Electrostatics::FieldStepper< T >:

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Public Member Functions
	FieldStepper ()
	Constructor – parses some input options.

virtual	~FieldStepper ()
	Destructor (does nothing)

void	setupSolvers () override
	Solver setup routine. This instantiates the FieldSolver and parses input options.

void	initialData () override
	Set initial data – this sets the space and surface charges.

void	postInitialize () override
	Post-initialization routine. This solves the Poisson equation.

void	allocate () override
	Allocation method – allocates memory and internal data for solvers.

MFAMRCellData &	getPotential ()
	Get the potential.

void	postCheckpointSetup () override
	Post-initialize operations to be performed – does nothing.

int	getNumberOfPlotVariables () const override
	Get number of plot variables. More...

Vector< std::string >	getPlotVariableNames () const override
	Get plot variable names.

void	writePlotData (LevelData< EBCellFAB > &a_output, int &a_icomp, const std::string a_outputRealm, const int a_level) const override
	Write plot data to file. More...

Real	computeDt () override
	Compute time step. More...

Real	advance (const Real a_dt) override
	Perform a single time step with step a_dt. More...

void	synchronizeSolverTimes (const int a_step, const Real a_time, const Real a_dt) override
	Synchronzie solver times and time steps. More...

void	printStepReport () override
	Print step report – this does nothing.

void	registerRealms () override
	Register simulation realms to be used for this simulation module.

void	registerOperators () override
	Register operators for this simulation module.

void	preRegrid (const int a_lbase, const int a_finestLevel) override
	Perform pre-regrid operations. More...

bool	loadBalanceThisRealm (const std::string a_realm) const override
	Load balancing query for a specified realm. If this returns true for a_realm, load balancing routines will be called during regrids. More...

void	loadBalanceBoxes (Vector< Vector< int >> &a_procs, Vector< Vector< Box >> &a_boxes, const std::string a_realm, const Vector< DisjointBoxLayout > &a_grids, const int a_lmin, const int a_finestLevel) override
	Load balance grid boxes for a specified realm. More...

void	regrid (const int a_lmin, const int a_oldFinestLevel, const int a_newFinestLevel) override
	Regrid method – regrids the potential distribution in FieldSolver (but does not solve the Poisson equation, that is done in postRegrid()). More...

void	postRegrid () override
	Perform post-regrid operations – this will resolve the Poisson equation. More...

void	setRho (const std::function< Real(const RealVect &a_pos)> &a_rho, const phase::which_phase a_phase) noexcept
	Set space charge. More...

void	setSigma (const std::function< Real(const RealVect &a_pos)> &a_sigma) noexcept
	Set surface charge. More...

Public Member Functions inherited from TimeStepper
	TimeStepper ()
	Default constructor (does nothing)

virtual	~TimeStepper ()
	Default destructor (does nothing)

void	setAmr (const RefCountedPtr< AmrMesh > &a_amr)
	Set AmrMesh. More...

void	setComputationalGeometry (const RefCountedPtr< ComputationalGeometry > &a_computationalGeometry)
	Set the computational geometry. More...

virtual void	parseRuntimeOptions ()
	Parse runtime options. More...

virtual void	prePlot ()
	An option for calling special functions prior to plotting data. Called by Driver in the IMMEDIATELY before writing the plot file.

virtual void	postPlot ()
	An option for calling special functions prior to plotting data. Called by Driver in the IMMEDIATELY after writing the plot file.

virtual Vector< long int >	getCheckpointLoads (const std::string a_realm, const int a_level) const
	Get computational loads to be checkpointed. More...

virtual bool	needToRegrid ()
	Fuction which can have Driver do regrids at arbitrary points in the simulation. More...

Protected Member Functions
void	solvePoisson ()
	Internal routine for solving the Poisson equation.

Protected Attributes
bool	m_loadBalance
	If true, the simulation will be introspectively load balanced.

BoxSorting	m_boxSort
	If using load balancing, this specifies how boxes will be sorted (in space) before load balancing.

RefCountedPtr< FieldSolver >	m_fieldSolver
	Reference to the FieldSolver.

RefCountedPtr< SurfaceODESolver< 1 > >	m_sigma
	Reference to the surface charge solver.

std::string	m_realm
	Realm where the solver lives.

std::function< Real(const RealVect &a_pos)>	m_rhoGas
	Space charge inside gas phase.

std::function< Real(const RealVect &a_pos)>	m_rhoDielectric
	Space charge inside dielectric.

std::function< Real(const RealVect &a_pos)>	m_surfaceChargeDensity
	Surface charge distribution.

Protected Attributes inherited from TimeStepper
int	m_verbosity
	Class verbosity.

int	m_timeStep
	Time step.

Real	m_time
	TIme.

Real	m_dt
	Previous time step size.

RefCountedPtr< AmrMesh >	m_amr
	AmrMesh.

RefCountedPtr< ComputationalGeometry >	m_computationalGeometry
	Computational geometry.

Detailed Description

template<class T>
class Physics::Electrostatics::FieldStepper< T >

Implementation of TimeStepper for solving electrostatic problems. The template parameter is the FieldSolver implementation type.

This is just a one-step method – it currently does not feature adaptive mesh refinement but uses the static grid set up by Driver. If the user wants to add mesh refinement he/she can add a CellTagger which flags cells for refinement.

The voltage on electrodes/domain faces is set to one. If the user wants to set a different voltage he will need to fetch the FieldSolver from the FieldStepper and call FieldStepper::setVoltage(...).

The initial space charge is set to a Gaussian blob, specified in the input script. The initial surface charge is set to a constant value specified in the input script.

Member Function Documentation

◆ advance()

template<class T >

Real Physics::Electrostatics::FieldStepper< T >::advance ( const Real a_dt )

overridevirtual

Perform a single time step with step a_dt.

Parameters

[in] a_dt Time step

Returns: a_dt

Implements TimeStepper.

◆ computeDt()

template<class T >

Real Physics::Electrostatics::FieldStepper< T >::computeDt ( )

inlineoverridevirtual

Compute time step.

This is a static solver so it returns 0.0

Implements TimeStepper.

◆ getNumberOfPlotVariables()

template<class T >

int Physics::Electrostatics::FieldStepper< T >::getNumberOfPlotVariables

overridevirtual

Get number of plot variables.

Returns: Returns plot variables for FieldSolver

Implements TimeStepper.

◆ loadBalanceBoxes()

template<class T >

void Physics::Electrostatics::FieldStepper< T >::loadBalanceBoxes	(	Vector< Vector< int >> &	a_procs,
		Vector< Vector< Box >> &	a_boxes,
		const std::string	a_realm,
		const Vector< DisjointBoxLayout > &	a_grids,
		const int	a_lmin,
		const int	a_finestLevel
	)

overridevirtual

Load balance grid boxes for a specified realm.

Parameters

[out]	a_procs	MPI ranks owning the various grid boxes.
[out]	a_boxes	Grid boxes on every level (obtain them with a_grids[lvl].boxArray())
[in]	a_realm	Realm identifier
[in]	a_grids	Original grids
[in]	a_lmin	Coarsest grid level that changed
[in]	a_finestLevel	New finest grid level

This is only called by Driver if TimeStepper::loadBalanceThisRealm(a_realm) returned true. The default implementation uses volume-based loads for the grid patches. If the user wants to load balance boxes on a realm, this routine must be overwritten and he should compute loads for the various patches in a_grids and call LoadBalancing::makeBalance on each level. It is up to the user/programmer to decide if load balancing should be done independently on each level, or if loads per MPI rank are accumulated across levels.

Reimplemented from TimeStepper.

◆ loadBalanceThisRealm()

template<class T >

bool Physics::Electrostatics::FieldStepper< T >::loadBalanceThisRealm ( const std::string a_realm ) const

overridevirtual

Load balancing query for a specified realm. If this returns true for a_realm, load balancing routines will be called during regrids.

Parameters

[in] a_realm Realm name

Reimplemented from TimeStepper.

◆ postRegrid()

template<class T >

void Physics::Electrostatics::FieldStepper< T >::postRegrid

overridevirtual

Perform post-regrid operations – this will resolve the Poisson equation.

This includes all operations to be done AFTER interpolating data to new grids.

Implements TimeStepper.

◆ preRegrid()

template<class T >

void Physics::Electrostatics::FieldStepper< T >::preRegrid	(	const int	a_lbase,
		const int	a_finestLevel
	)

overridevirtual

Perform pre-regrid operations.

Parameters

[in]	a_lmin	The coarsest level that changes
[in]	a_oldFinestLevel	The finest level before the regrid.

Implements TimeStepper.

◆ regrid()

template<class T >

void Physics::Electrostatics::FieldStepper< T >::regrid	(	const int	a_lmin,
		const int	a_oldFinestLevel,
		const int	a_newFinestLevel
	)

overridevirtual

Regrid method – regrids the potential distribution in FieldSolver (but does not solve the Poisson equation, that is done in postRegrid()).

Parameters

[in]	a_lmin	The coarsest level that changed.
[in]	a_oldFinestLevel	The finest level before the regrid.
[in]	a_newFinestLevel	The finest level after the regrid.

Implements TimeStepper.

◆ setRho()

template<class T >

void Physics::Electrostatics::FieldStepper< T >::setRho	(	const std::function< Real(const RealVect &a_pos)> &	a_rho,
		const phase::which_phase	a_phase
	)

noexcept

Set space charge.

Parameters

[in] a_rho Space charge distribution

◆ setSigma()

template<class T >

void Physics::Electrostatics::FieldStepper< T >::setSigma ( const std::function< Real(const RealVect &a_pos)> & a_sigma )

noexcept

Set surface charge.

Parameters

[in] a_sigma Surface charge distribution

◆ synchronizeSolverTimes()

template<class T >

void Physics::Electrostatics::FieldStepper< T >::synchronizeSolverTimes	(	const int	a_step,
		const Real	a_time,
		const Real	a_dt
	)

overridevirtual

Synchronzie solver times and time steps.

Parameters

[in]	a_step	Time step
[in]	a_time	Time (in seconds)
[in]	a_dt	Time step that was used.

Implements TimeStepper.

◆ writePlotData()

template<class T >

void Physics::Electrostatics::FieldStepper< T >::writePlotData	(	LevelData< EBCellFAB > &	a_output,
		int &	a_icomp,
		const std::string	a_outputRealm,
		const int	a_level
	)		const

overridevirtual

Write plot data to file.

Parameters

[in,out]	a_output	Output data holder.
[in,out]	a_icomp	Starting component in a_output to begin at.
	{in]	a_outputRealm Realm where a_output belongs
[in]	a_level	Grid level

Implements TimeStepper.

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

Physics/Electrostatics/CD_FieldStepper.H
Physics/Electrostatics/CD_FieldStepperImplem.H

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

template<class T> class Physics::Electrostatics::FieldStepper< T >

Member Function Documentation

◆ advance()

◆ computeDt()

◆ getNumberOfPlotVariables()

◆ loadBalanceBoxes()

◆ loadBalanceThisRealm()

◆ postRegrid()

◆ preRegrid()

◆ regrid()

◆ setRho()

◆ setSigma()

◆ synchronizeSolverTimes()

◆ writePlotData()

template<class T>
class Physics::Electrostatics::FieldStepper< T >