amrex::FluxRegister Class Reference

Flux Register. More...

#include <AMReX_FluxRegister.H>

Inheritance diagram for amrex::FluxRegister:

Public Types
enum	FrOp { COPY = 0 , ADD = 1 }
	An enum that says whether to add or copy src data to members. More...
Public Types inherited from amrex::BndryRegisterT< MultiFab >
using	value_type

Public Member Functions
	FluxRegister ()
	The default constructor.
	FluxRegister (const BoxArray &fine_boxes, const DistributionMapping &dm, const IntVect &ref_ratio, int fine_lev, int nvar)
	Constructor.
	~FluxRegister ()=default
	The destructor.
	FluxRegister (FluxRegister &&rhs) noexcept=default
	FluxRegister (const FluxRegister &rhs)=delete
FluxRegister &	operator= (const FluxRegister &rhs)=delete
FluxRegister &	operator= (FluxRegister &&rhs)=delete
void	define (const BoxArray &fine_boxes, const DistributionMapping &dm, const IntVect &ref_ratio, int fine_lev, int nvar)
	Initialize after default construction.
void	clear ()
	Release all internal data structures and reset to the default-constructed state.
const IntVect &	refRatio () const noexcept
	Returns the refinement ratio.
int	fineLevel () const noexcept
	Returns the level number of the fine level.
int	crseLevel () const noexcept
	Returns the level number of the coarse level (fineLevel()-1).
int	nComp () const noexcept
	The number of components.
const BoxArray &	coarsenedBoxes () const noexcept
	The coarsened boxes.
Real	SumReg (int comp) const
	Returns the sum of the registers.
void	CrseInit (const MultiFab &mflx, const MultiFab &area, int dir, int srccomp, int destcomp, int numcomp, Real mult=-1.0, FrOp op=FluxRegister::COPY)
	Initialize flux correction with coarse data.
void	CrseInit (const MultiFab &mflx, int dir, int srccomp, int destcomp, int numcomp, Real mult=-1.0, FrOp op=FluxRegister::COPY)
	Initialize flux correction with coarse data (area already applied).
void	CrseAdd (const MultiFab &mflx, const MultiFab &area, int dir, int srccomp, int destcomp, int numcomp, Real mult, const Geometry &geom)
	Add coarse fluxes to the register without overwriting existing data.
void	CrseAdd (const MultiFab &mflx, int dir, int srccomp, int destcomp, int numcomp, Real mult, const Geometry &geom)
	Like CrseAdd above but assumes areas are already multiplied into mflx.
void	FineAdd (const MultiFab &mflx, int dir, int srccomp, int destcomp, int numcomp, Real mult)
	Increment flux correction with fine data (areas already applied).
void	FineAdd (const MultiFab &mflx, const MultiFab &area, int dir, int srccomp, int destcomp, int numcomp, Real mult)
	Increment flux correction with fine data, supplying explicit areas.
void	FineAdd (const FArrayBox &flux, int dir, int boxno, int srccomp, int destcomp, int numcomp, Real mult, RunOn runon) noexcept
	Increment flux correction with fine data.
void	FineAdd (const FArrayBox &flux, const FArrayBox &area, int dir, int boxno, int srccomp, int destcomp, int numcomp, Real mult, RunOn runon) noexcept
	Increment flux correction with fine flux and area.
void	FineSetVal (int dir, int boxno, int destcomp, int numcomp, Real val, RunOn runon) noexcept
	Set flux correction data for a fine box (given by boxno) to val. This routine used by FLASH does NOT run on GPU for safety.
void	Reflux (MultiFab &mf, const MultiFab &volume, Real scale, int scomp, int dcomp, int nc, const Geometry &crse_geom)
	Apply flux correction and divide by coarse cell volumes.
void	Reflux (MultiFab &mf, const MultiFab &volume, int dir, Real scale, int scomp, int dcomp, int nc, const Geometry &crse_geom)
	Overload that only corrects faces in direction dir using explicit cell volumes.
void	Reflux (MultiFab &mf, Real scale, int scomp, int dcomp, int nc, const Geometry &crse_geom)
	Constant-volume version of Reflux() (no explicit volume MultiFab).
void	Reflux (MultiFab &mf, int dir, Real scale, int scomp, int dcomp, int nc, const Geometry &crse_geom)
	Overload that only corrects faces in direction dir assuming unit volumes.
void	OverwriteFlux (Array< MultiFab *, 3 > const &crse_fluxes, Real scale, int srccomp, int destcomp, int numcomp, const Geometry &crse_geom)
	Overwrite the coarse flux at the coarse/fine interface (and the interface only) with the fine flux stored in the FluxRegister.
void	ClearInternalBorders (const Geometry &crse_geom)
	Set internal coarse/fine border fluxes to zero before reuse.
void	write (const std::string &name, std::ostream &os) const
	Write data to checkpoint files.
void	read (const std::string &name, std::istream &is)
	Read data from checkpoint files.
void	Reflux (MultiFab &mf, const MultiFab &volume, Orientation face, Real scale, int scomp, int dcomp, int nc, const Geometry &geom)
	Low-level helper used on GPUs: apply correction for a single face orientation.
Public Member Functions inherited from amrex::BndryRegisterT< MultiFab >
	BndryRegisterT () noexcept=default
	The default constructor.
	BndryRegisterT (const BoxArray &grids_, const DistributionMapping &dmap, int in_rad, int out_rad, int extent_rad, int ncomp)
	The constructor, given number of cells in/out, extent and number of components (assumes cell-centered boxes, and allocates cell-centered FABs).
	~BndryRegisterT ()=default
	The destructor.
	BndryRegisterT (BndryRegisterT< MultiFab > &&rhs) noexcept=default
	BndryRegisterT (const BndryRegisterT< MultiFab > &src)=delete
BndryRegisterT &	operator= (const BndryRegisterT< MultiFab > &src)=delete
BndryRegisterT &	operator= (BndryRegisterT< MultiFab > &&rhs)=delete
void	define (const BoxArray &grids_, const DistributionMapping &dmap, int in_rad, int out_rad, int extent_rad, int ncomp)
	Allocate boundary FabSets for all faces.
void	define (Orientation face, IndexType typ, int in_rad, int out_rad, int extent_rad, int ncomp, const DistributionMapping &dm)
	Build FABs along a particular face orientation.
void	clear ()
	Release all FABs and clear the associated BoxArray.
const BoxArray &	boxes () const noexcept
	Get box domain (as an array of boxes).
int	size () const noexcept
	Return the number of grids in this domain.
const FabSetT< MultiFab > &	operator[] (Orientation face) const noexcept
	Return const set of FABs bounding the domain grid boxes on orientation face.
FabSetT< MultiFab > &	operator[] (Orientation face) noexcept
	Return set of FABs bounding the domain grid boxes on orientation face.
void	setVal (value_type v)
	Set all boundary FABs to the scalar value v across every component.
BndryRegisterT< MultiFab > &	operator+= (const BndryRegisterT< MultiFab > &rhs)
	Accumulate another register with identical layout into this one.
BndryRegisterT< MultiFab > &	plus (const BndryRegisterT< MultiFab > &rhs)
	Convenience alias for operator+=.
BndryRegisterT< MultiFab > &	copyFrom (const MultiFab &src, int nghost, int src_comp, int dest_comp, int num_comp, const Periodicity &period=Periodicity::NonPeriodic())
	Fill boundary FABs with num_comp components copied from src (component src_comp) into dest_comp, sampling nghost layers and honoring period.
BndryRegisterT< MultiFab > &	plusFrom (const MultiFab &src, int nghost, int src_comp, int dest_comp, int num_comp, const Periodicity &period=Periodicity::NonPeriodic())
	Increment boundary FABs with num_comp components from src, using the same arguments as copyFrom().
BndryRegisterT< MultiFab > &	linComb (value_type a, const MultiFab &mfa, int a_comp, value_type b, const MultiFab &mfb, int b_comp, int dest_comp, int num_comp, int n_ghost=0)
	Linear combination: this := a * mfa + b * mfb on the boundary, using components a_comp/b_comp and writing to dest_comp for num_comp entries with n_ghost layers.
void	setBoxes (const BoxArray &grids)
	Set the BoxArray domain to grids once prior to calling define().
const DistributionMapping &	DistributionMap () const noexcept
	Returns the DistributionMapping describing which MPI ranks own each boundary FAB.
void	write (const std::string &name, std::ostream &os) const
	Write all FabSets to disk (used for checkpoint data).
void	read (const std::string &name, std::istream &is)
	Read all FabSets from disk (used for checkpoint data).

Additional Inherited Members
Static Public Member Functions inherited from amrex::BndryRegisterT< MultiFab >
static void	Copy (BndryRegisterT< MultiFab > &dst, const BndryRegisterT< MultiFab > &src)
	Local copy function for duplicating boundary registers.
Protected Attributes inherited from amrex::BndryRegisterT< MultiFab >
FabSetT< MultiFab >	bndry [2 *3]
	The data.
BoxArray	grids

Detailed Description

Flux Register.

Stores and manipulates fluxes at coarse-fine interfaces.

Member Enumeration Documentation

FrOp

enum amrex::FluxRegister::FrOp

An enum that says whether to add or copy src data to members.

Enumerator
COPY
ADD

Constructor & Destructor Documentation

FluxRegister() [1/4]

amrex::FluxRegister::FluxRegister

(

)

The default constructor.

FluxRegister() [2/4]

amrex::FluxRegister::FluxRegister	(	const BoxArray &	fine_boxes,
		const DistributionMapping &	dm,
		const IntVect &	ref_ratio,
		int	fine_lev,
		int	nvar )

Constructor.

Parameters

fine_boxes	Fine-level BoxArray.
dm	DistributionMapping describing ownership of fine boxes.
ref_ratio	Refinement ratio between coarse and fine.
fine_lev	Fine AMR level index.
nvar	Number of components carried in the registers.

~FluxRegister()

amrex::FluxRegister::~FluxRegister ( )

default

The destructor.

FluxRegister() [3/4]

amrex::FluxRegister::FluxRegister ( FluxRegister && rhs )

defaultnoexcept

FluxRegister() [4/4]

amrex::FluxRegister::FluxRegister ( const FluxRegister & rhs )

delete

Member Function Documentation

clear()

void amrex::FluxRegister::clear

(

)

Release all internal data structures and reset to the default-constructed state.

ClearInternalBorders()

void amrex::FluxRegister::ClearInternalBorders

(

const Geometry &

crse_geom

)

Set internal coarse/fine border fluxes to zero before reuse.

Parameters

crse_geom

Coarse Geometry describing the domain (needed for iteration).

coarsenedBoxes()

const BoxArray & amrex::FluxRegister::coarsenedBoxes ( ) const

noexcept

The coarsened boxes.

CrseAdd() [1/2]

void amrex::FluxRegister::CrseAdd	(	const MultiFab &	mflx,
		const MultiFab &	area,
		int	dir,
		int	srccomp,
		int	destcomp,
		int	numcomp,
		Real	mult,
		const Geometry &	geom )

Add coarse fluxes to the register without overwriting existing data.

Unlike CrseInit(ADD), this path is used when fine-grid fluxes are unavailable on regions covered by fine levels (e.g., the FLASH code).

Parameters

mflx	Coarse flux MultiFab.
area	Coarse face areas.
dir	Direction index.
srccomp	Starting component in mflx.
destcomp	Starting component in the register.
numcomp	Number of components.
mult	Scale factor applied to the flux.
geom	Coarse Geometry (needed for periodic wrap-around).

CrseAdd() [2/2]

void amrex::FluxRegister::CrseAdd	(	const MultiFab &	mflx,
		int	dir,
		int	srccomp,
		int	destcomp,
		int	numcomp,
		Real	mult,
		const Geometry &	geom )

Like CrseAdd above but assumes areas are already multiplied into mflx.

Parameters

mflx	Coarse flux with area weighting.
dir	Direction index.
srccomp	Starting component in mflx.
destcomp	Starting component in the register.
numcomp	Number of components.
mult	Scale factor applied to the flux.
geom	Coarse Geometry (needed for periodic wrap-around).

CrseInit() [1/2]

void amrex::FluxRegister::CrseInit	(	const MultiFab &	mflx,
		const MultiFab &	area,
		int	dir,
		int	srccomp,
		int	destcomp,
		int	numcomp,
		Real	mult = -1.0,
		FrOp	op = FluxRegister::COPY )

Initialize flux correction with coarse data.

Parameters

mflx	Coarse flux MultiFab.
area	Area MultiFab on the coarse faces.
dir	Direction index of the flux.
srccomp	Starting component in mflx.
destcomp	Starting component stored in the register.
numcomp	Number of components to copy.
mult	Optional scale factor applied to the flux.
op	Whether to COPY or ADD the flux into the register.

CrseInit() [2/2]

void amrex::FluxRegister::CrseInit	(	const MultiFab &	mflx,
		int	dir,
		int	srccomp,
		int	destcomp,
		int	numcomp,
		Real	mult = -1.0,
		FrOp	op = FluxRegister::COPY )

Initialize flux correction with coarse data (area already applied).

Parameters

mflx	Coarse flux MultiFab with area weighting applied.
dir	Direction index.
srccomp	Starting component in mflx.
destcomp	Starting component in the register.
numcomp	Number of components.
mult	Optional scale factor.
op	Whether to COPY or ADD the flux into the register.

crseLevel()

int amrex::FluxRegister::crseLevel ( ) const

noexcept

Returns the level number of the coarse level (fineLevel()-1).

define()

void amrex::FluxRegister::define	(	const BoxArray &	fine_boxes,
		const DistributionMapping &	dm,
		const IntVect &	ref_ratio,
		int	fine_lev,
		int	nvar )

Initialize after default construction.

Parameters

fine_boxes	Fine-level BoxArray.
dm	DistributionMapping describing ownership.
ref_ratio	Refinement ratio between coarse and fine.
fine_lev	Fine AMR level index.
nvar	Number of components.

FineAdd() [1/4]

void amrex::FluxRegister::FineAdd ( const FArrayBox & flux, const FArrayBox & area, int dir, int boxno, int srccomp, int destcomp, int numcomp, Real mult, RunOn runon )

noexcept

Increment flux correction with fine flux and area.

Parameters

flux	Fine flux FAB.
area	Area FAB.
dir	Direction index.
boxno	Index of the owning FAB in the register.
srccomp	Starting component in flux.
destcomp	Starting component in the register.
numcomp	Number of components.
mult	Scale factor.
runon	Execution context (host/device) when copying into the register.

FineAdd() [2/4]

void amrex::FluxRegister::FineAdd ( const FArrayBox & flux, int dir, int boxno, int srccomp, int destcomp, int numcomp, Real mult, RunOn runon )

noexcept

Increment flux correction with fine data.

This overload assumes areas have already been multiplied into flux.

Parameters

flux	Fine flux FAB.
dir	Direction index.
boxno	Index of the owning FAB in the register.
srccomp	Starting component in flux.
destcomp	Starting component in the register.
numcomp	Number of components.
mult	Scale factor.
runon	Execution context (host/device) when copying into the register.

FineAdd() [3/4]

void amrex::FluxRegister::FineAdd	(	const MultiFab &	mflx,
		const MultiFab &	area,
		int	dir,
		int	srccomp,
		int	destcomp,
		int	numcomp,
		Real	mult )

Increment flux correction with fine data, supplying explicit areas.

Parameters

mflx	Fine flux MultiFab.
area	Fine face areas.
dir	Direction index.
srccomp	Starting component in mflx.
destcomp	Starting component in the register.
numcomp	Number of components.
mult	Scale factor.

FineAdd() [4/4]

void amrex::FluxRegister::FineAdd	(	const MultiFab &	mflx,
		int	dir,
		int	srccomp,
		int	destcomp,
		int	numcomp,
		Real	mult )

Increment flux correction with fine data (areas already applied).

Parameters

mflx	Fine flux MultiFab.
dir	Direction index.
srccomp	Starting component in mflx.
destcomp	Starting component in the register.
numcomp	Number of components.
mult	Scale factor (typically +1).

fineLevel()

int amrex::FluxRegister::fineLevel ( ) const

noexcept

Returns the level number of the fine level.

FineSetVal()

void amrex::FluxRegister::FineSetVal ( int dir, int boxno, int destcomp, int numcomp, Real val, RunOn runon )

noexcept

Set flux correction data for a fine box (given by boxno) to val. This routine used by FLASH does NOT run on GPU for safety.

Parameters

dir	Direction index.
boxno	Index of the owning FAB in the register.
destcomp	Starting component to set.
numcomp	Number of components to set.
val	Scalar value to assign.
runon	Execution context (host/device).

nComp()

int amrex::FluxRegister::nComp ( ) const

noexcept

The number of components.

operator=() [1/2]

FluxRegister & amrex::FluxRegister::operator= ( const FluxRegister & rhs )

delete

operator=() [2/2]

FluxRegister & amrex::FluxRegister::operator= ( FluxRegister && rhs )

delete

OverwriteFlux()

void amrex::FluxRegister::OverwriteFlux	(	Array< MultiFab *, 3 > const &	crse_fluxes,
		Real	scale,
		int	srccomp,
		int	destcomp,
		int	numcomp,
		const Geometry &	crse_geom )

Overwrite the coarse flux at the coarse/fine interface (and the interface only) with the fine flux stored in the FluxRegister.

Parameters

crse_fluxes	MultiFab pointers to coarse fluxes.
scale	scaling factor by which the fine flux is multiplied.
srccomp	starting component in fine flux in the FluxRegister
destcomp	starting component in coarse flux MultiFab
numcomp	number of components
crse_geom	coarse Geometry

read()

void amrex::FluxRegister::read	(	const std::string &	name,
		std::istream &	is )

Read data from checkpoint files.

Parameters

name	Base filename prefix.
is	Stream providing metadata.

Reflux() [1/5]

void amrex::FluxRegister::Reflux	(	MultiFab &	mf,
		const MultiFab &	volume,
		int	dir,
		Real	scale,
		int	scomp,
		int	dcomp,
		int	nc,
		const Geometry &	crse_geom )

Overload that only corrects faces in direction dir using explicit cell volumes.

Reflux() [2/5]

void amrex::FluxRegister::Reflux	(	MultiFab &	mf,
		const MultiFab &	volume,
		Orientation	face,
		Real	scale,
		int	scomp,
		int	dcomp,
		int	nc,
		const Geometry &	geom )

Low-level helper used on GPUs: apply correction for a single face orientation.

Parameters

mf	Coarse MultiFab to correct.
volume	Coarse cell volumes.
face	Orientation being updated.
scale	Scaling factor applied to the accumulated flux.
scomp	Starting component within the register.
dcomp	Starting component within mf.
nc	Number of components to correct.
geom	Coarse Geometry (used for periodic wrap and face iteration).

Reflux() [3/5]

void amrex::FluxRegister::Reflux	(	MultiFab &	mf,
		const MultiFab &	volume,
		Real	scale,
		int	scomp,
		int	dcomp,
		int	nc,
		const Geometry &	crse_geom )

Apply flux correction and divide by coarse cell volumes.

Parameters

mf	Coarse MultiFab to correct.
volume	Coarse cell volumes.
scale	Scaling factor applied to the correction.
scomp	Starting component within the register.
dcomp	Starting component within mf.
nc	Number of components to correct.
crse_geom	Coarse Geometry (used for periodic wrap and face orientation).

Reflux() [4/5]

void amrex::FluxRegister::Reflux	(	MultiFab &	mf,
		int	dir,
		Real	scale,
		int	scomp,
		int	dcomp,
		int	nc,
		const Geometry &	crse_geom )

Overload that only corrects faces in direction dir assuming unit volumes.

Reflux() [5/5]

void amrex::FluxRegister::Reflux	(	MultiFab &	mf,
		Real	scale,
		int	scomp,
		int	dcomp,
		int	nc,
		const Geometry &	crse_geom )

Constant-volume version of Reflux() (no explicit volume MultiFab).

Parameters

mf	Coarse MultiFab to correct.
scale	Scaling factor applied to the correction.
scomp	Starting component within the register.
dcomp	Starting component within mf.
nc	Number of components to correct.
crse_geom	Coarse Geometry.

refRatio()

const IntVect & amrex::FluxRegister::refRatio ( ) const

noexcept

Returns the refinement ratio.

SumReg()

Real amrex::FluxRegister::SumReg

(

int

comp

)

const

Returns the sum of the registers.

Parameters

comp

write()

void amrex::FluxRegister::write	(	const std::string &	name,
		std::ostream &	os ) const

Write data to checkpoint files.

Parameters

name	Base filename prefix.
os	Stream storing metadata (e.g., BoxArray layout).

---

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

• /home/runner/work/amrex/amrex/Src/AmrCore/AMReX_FluxRegister.H
• /home/runner/work/amrex/amrex/Src/AmrCore/AMReX_FluxRegister.cpp