zh_collocated_gap Namespace Reference

Functions
	drag (N, kind, mu=0.1, F=1e-3, dt=80.0, warm_tol=1e-7, tail=40, max_steps=4000)

Variables
	PHI0
	K_ZH
list	Ns = [int(x) for x in (sys.argv[1:] or [32, 48, 64, 96, 128, 192, 256])]
	prev = None
tuple	R = (3 * PHI0 / (4 * np.pi)) ** (1 / 3) * N
	ks
	ns
	ts
	kg
	ng
	tg
float	gap = 100.0 * (kg - ks) / ks
str	o = ""
	flush

Detailed Description

Is the collocated permeability ceiling real? Measure the collocated-minus-staggered GAP on
Zick & Homsy, where both solvers run the same harness on identical geometry.

Measuring either solver against K_ZH = 4.292 is limited by the table's four figures (+-0.023 %).
The GAP between two computations on the same grid has no such limit: the benchmark value cancels,
so a ceiling of 0.3 % is resolvable far below its own size, and the question "does the gap decay
under refinement or flatten" gets a clean answer.

    SDFLOW_BUILD=build_ge python tests/study/zh_collocated_gap.py [N ...]

Function Documentation

drag()

zh_collocated_gap.drag	(		N,
			kind,
			mu = 0.1,
			F = 1e-3,
			dt = 80.0,
			warm_tol = 1e-7,
			tail = 40,
			max_steps = 4000
	)

Definition at line 25 of file zh_collocated_gap.py.

Variable Documentation

PHI0

zh_collocated_gap.PHI0

Definition at line 22 of file zh_collocated_gap.py.

K_ZH

zh_collocated_gap.K_ZH

Definition at line 22 of file zh_collocated_gap.py.

Ns

list zh_collocated_gap.Ns = [int(x) for x in (sys.argv[1:] or [32, 48, 64, 96, 128, 192, 256])]

Definition at line 61 of file zh_collocated_gap.py.

prev

tuple zh_collocated_gap.prev = None

Definition at line 64 of file zh_collocated_gap.py.

R

tuple zh_collocated_gap.R = (3 * PHI0 / (4 * np.pi)) ** (1 / 3) * N

Definition at line 66 of file zh_collocated_gap.py.

ks

zh_collocated_gap.ks

Definition at line 68 of file zh_collocated_gap.py.

ns

zh_collocated_gap.ns

Definition at line 68 of file zh_collocated_gap.py.

ts

zh_collocated_gap.ts

Definition at line 68 of file zh_collocated_gap.py.

kg

zh_collocated_gap.kg

Definition at line 69 of file zh_collocated_gap.py.

ng

zh_collocated_gap.ng

Definition at line 69 of file zh_collocated_gap.py.

tg

zh_collocated_gap.tg

Definition at line 69 of file zh_collocated_gap.py.

gap

float zh_collocated_gap.gap = 100.0 * (kg - ks) / ks

Definition at line 72 of file zh_collocated_gap.py.

o

str zh_collocated_gap.o = ""

Definition at line 73 of file zh_collocated_gap.py.

flush

zh_collocated_gap.flush

Definition at line 77 of file zh_collocated_gap.py.