Ghost-gradient overlay (setGhostGradient): per cut cell, a precomputed 3-point directional FD stencil per axis replacing the ABC grad3 value — central where both axis-neighbour centers are fluid, 2nd-order one-sided toward the fluid else (never reads a decoupled solid-centered value; gradOf's read of the pinned p=0 through partially-open faces is a gauge-dependent O(1/h) error at cut cells — measured in tests/study_amr_ghost_apriori.cpp). More...

#include <flow.hpp>

Public Attributes
Index	n = 0
	number of overlay (cut) cells

View< Index >	cell
	[n] leaf index

View< Index >	idx
	[n9] stencil cell, slot s9 + axis*3 + k

View< double >	w
	[n*9] stencil weight (0 = unused)

Detailed Description

Ghost-gradient overlay (setGhostGradient): per cut cell, a precomputed 3-point directional FD stencil per axis replacing the ABC grad3 value — central where both axis-neighbour centers are fluid, 2nd-order one-sided toward the fluid else (never reads a decoupled solid-centered value; gradOf's read of the pinned p=0 through partially-open faces is a gauge-dependent O(1/h) error at cut cells — measured in tests/study_amr_ghost_apriori.cpp).

Weights include the 1/h factors; unused entries carry w=0.

Definition at line 253 of file flow.hpp.