FiniteDifference.H File Reference

#include "ablastr/utils/Enums.H"
#include <AMReX_Vector.H>
#include <AMReX_REAL.H>

Go to the source code of this file.

Namespaces
namespace	ablastr
namespace	ablastr::math

Functions
amrex::Vector< amrex::Real >	ablastr::math::getFornbergStencilCoefficients (int n_order, ablastr::utils::enums::GridType a_grid_type)
	Returns an array of coefficients (Fornberg coefficients), corresponding to the weight of each point in a finite-difference approximation of a derivative (up to order n_order).
void	ablastr::math::ReorderFornbergCoefficients (amrex::Vector< amrex::Real > &ordered_coeffs, const amrex::Vector< amrex::Real > &unordered_coeffs, int order)
	Re-orders the Fornberg coefficients so that they can be used more conveniently for finite-order centering operations. For example, for finite-order centering of order 6, the Fornberg coefficients (c_0,c_1,c_2) are re-ordered as (c_2,c_1,c_0,c_0,c_1,c_2).