engine.stability_hifi.meanflow.spec Namespace Reference

Classes
class	FlameReference
class	ProvenanceRecord
class	MeanFlowSpec

Functions
MeanFlowSpec	synthetic_uniform_cylinder (float L, float R, int nx, int nr, *, float c_sound, float gamma=1.2, float rho=4.0)
MeanFlowSpec	synthetic_two_zone_duct (float L1, float L2, float R, int nx1, int nx2, int nr, *, float c1, float c2, float gamma=1.2, float rho=4.0)

Detailed Description

The ``MeanFlowSpec`` interface (paper Section V.A).

Every eigensolver input passes through this one container, so mean-flow fidelity
(synthetic uniform field -> parametric generator -> warm-started SU2 RANS) can be
swapped without touching the mesh, assembly, or eigensolver code. P0 only uses the
synthetic generator at the bottom of this file.

Function Documentation

synthetic_two_zone_duct()

MeanFlowSpec engine.stability_hifi.meanflow.spec.synthetic_two_zone_duct	(	float	L1,
		float	L2,
		float	R,
		int	nx1,
		int	nx2,
		int	nr,
		*	,
		float	c1,
		float	c2,
		float	gamma = 1.2,
		float	rho = 4.0 )

Two-zone duct with a sound-speed (temperature) jump at x=L1 (verification case V2).

``c1`` applies on ``[0, L1]``, ``c2`` on ``[L1, L1+L2]`` — a step discontinuity, not
a smooth profile, which is exactly why this uses ``c_element`` (see ``MeanFlowSpec``
docstring) rather than the ordinary per-node ``c`` field. ``rho`` is passed through
uniformly for now; density does jump physically alongside sound speed at a real
temperature interface (rho = p/(R*T), same p, different T), but the passive
Helmholtz operator (Eq. 10) only ever uses ``c``, so it plays no role in this case.

Definition at line 91 of file spec.py.

synthetic_uniform_cylinder()

MeanFlowSpec engine.stability_hifi.meanflow.spec.synthetic_uniform_cylinder	(	float	L,
		float	R,
		int	nx,
		int	nr,
		*	,
		float	c_sound,
		float	gamma = 1.2,
		float	rho = 4.0 )

Uniform-property closed cylinder mean flow (verification case V1).

Constant sound speed / density / gamma everywhere, no heat release (passive) — the
exact configuration the analytic mode formula in Section VII.A (case V1) assumes.

Definition at line 68 of file spec.py.