ablastr::coarsen::average Namespace Reference

Functions
void	Loop (amrex::MultiFab &mf_dst, amrex::MultiFab const &mf_src, int ncomp, amrex::IntVect ngrow, amrex::IntVect crse_ratio)
	Loops over the boxes of the coarsened MultiFab mf_dst and fills them by interpolating the data contained in the fine MultiFab mf_src.
void	Coarsen (amrex::MultiFab &mf_dst, amrex::MultiFab const &mf_src, amrex::IntVect crse_ratio)
	Stores in the coarsened MultiFab mf_dst the values obtained by interpolating the data contained in the fine MultiFab mf_src.
AMREX_GPU_DEVICE AMREX_FORCE_INLINE amrex::Real	Interp (amrex::Array4< amrex::Real const > const &arr_src, amrex::GpuArray< int, 3 > const &sf, amrex::GpuArray< int, 3 > const &sc, amrex::GpuArray< int, 3 > const &cr, int const i, int const j, int const k, int const comp)
	Interpolates the floating point data contained in the source Array4 arr_src, extracted from a fine MultiFab, with weights defined in such a way that the total charge is preserved.

Detailed Description

Mesh Coarsening by Averaging

These methods are mostly used for mesh-refinement.

Function Documentation

Coarsen()

void ablastr::coarsen::average::Coarsen	(	amrex::MultiFab &	mf_dst,
		amrex::MultiFab const &	mf_src,
		amrex::IntVect	crse_ratio )

Stores in the coarsened MultiFab mf_dst the values obtained by interpolating the data contained in the fine MultiFab mf_src.

Parameters

[in,out]	mf_dst	coarsened MultiFab containing the floating point data to be filled by interpolating the fine MultiFab mf_src
[in]	mf_src	fine MultiFab containing the floating point data to be interpolated
[in]	crse_ratio	coarsening ratio between the fine MultiFab mf_src and the coarsened MultiFab mf_dst along each spatial direction

Interp()

AMREX_GPU_DEVICE AMREX_FORCE_INLINE amrex::Real ablastr::coarsen::average::Interp	(	amrex::Array4< amrex::Real const > const &	arr_src,
		amrex::GpuArray< int, 3 > const &	sf,
		amrex::GpuArray< int, 3 > const &	sc,
		amrex::GpuArray< int, 3 > const &	cr,
		int const	i,
		int const	j,
		int const	k,
		int const	comp )

Interpolates the floating point data contained in the source Array4 arr_src, extracted from a fine MultiFab, with weights defined in such a way that the total charge is preserved.

The input (sf) and output (sc) staggering need to be the same.

Parameters

[in]	arr_src	floating point data to be interpolated
[in]	sf	staggering of the source fine MultiFab
[in]	sc	staggering of the destination coarsened MultiFab
[in]	cr	coarsening ratio along each spatial direction
[in]	i	index along x of the coarsened Array4 to be filled
[in]	j	index along y of the coarsened Array4 to be filled
[in]	k	index along z of the coarsened Array4 to be filled
[in]	comp	index along the fourth component of the Array4 arr_src containing the data to be interpolated

Returns

interpolated field at cell (i,j,k) of a coarsened Array4

Loop()

void ablastr::coarsen::average::Loop	(	amrex::MultiFab &	mf_dst,
		amrex::MultiFab const &	mf_src,
		int	ncomp,
		amrex::IntVect	ngrow,
		amrex::IntVect	crse_ratio )

Loops over the boxes of the coarsened MultiFab mf_dst and fills them by interpolating the data contained in the fine MultiFab mf_src.

Parameters

[in,out]	mf_dst	coarsened MultiFab containing the floating point data to be filled by interpolating the source fine MultiFab
[in]	mf_src	fine MultiFab containing the floating point data to be interpolated
[in]	ncomp	number of components to loop over for the coarsened Array4 extracted from the coarsened MultiFab mf_dst
[in]	ngrow	number of guard cells to fill along each spatial direction
[in]	crse_ratio	coarsening ratio between the fine MultiFab mf_src and the coarsened MultiFab mf_dst along each spatial direction