verify_velocity_mg_staircase_packing_sdflow Namespace Reference

Functions
	packing_sdf (N, R, target_phi, gap=2.0, seed=0)
	run (sdf, mode, dt, vcyc=16, levels=4, mu=0.1, f=1e-3, steps=600, tol=1e-7)
	main ()
	mu_b (dt, mu=0.1)

Detailed Description

Staircase velocity-MG on a REAL packed bed (random periodic sphere packing, thin pore necks).

The SC single sphere is one connected solid blob; a packed bed has MANY solid spheres with thin fluid necks
between near-contacts -- the geometry that stresses the coarse operator (the const-coarse couples fluid
pockets through resolved walls; the staircase classification should disconnect them). This checks that the
staircase velocity-MG (a) gives the EXACT RB-GS mean velocity / permeability on a packed bed, (b) stays stable
at large dt, and (c) how the coarsening-level cap matters (deep coarsening dissolves the thin necks).

Function Documentation

packing_sdf()

verify_velocity_mg_staircase_packing_sdflow.packing_sdf	(		N,
			R,
			target_phi,
			gap = 2.0,
			seed = 0
	)

Random periodic sphere packing: greedily place non-overlapping spheres (min surface gap `gap` cells)
until the solid fraction reaches target_phi. SDF = min over spheres of (dist - R), periodic, <0 in solid.

Definition at line 20 of file verify_velocity_mg_staircase_packing_sdflow.py.

Referenced by main().

run()

verify_velocity_mg_staircase_packing_sdflow.run	(		sdf,
			mode,
			dt,
			vcyc = 16,
			levels = 4,
			mu = 0.1,
			f = 1e-3,
			steps = 600,
			tol = 1e-7
	)

mode: 'rbgs' (plain RB-GS reference) | 'vmg' (the staircase velocity-MG, via set_velocity_multigrid).

Definition at line 50 of file verify_velocity_mg_staircase_packing_sdflow.py.

Referenced by main().

main()

verify_velocity_mg_staircase_packing_sdflow.main

(

)

Definition at line 75 of file verify_velocity_mg_staircase_packing_sdflow.py.

References packing_sdf(), and run().

Referenced by mu_b().

mu_b()

verify_velocity_mg_staircase_packing_sdflow.mu_b	(		dt,
			mu = 0.1
	)

Definition at line 98 of file verify_velocity_mg_staircase_packing_sdflow.py.

References main().