flow.duct_walls

flow.duct_walls(shape)

The lateral walls of a duct whose axis is +Y.

The x and z extremes are solid; the y extremes are left open for the inlet and outlet.

Built in NumPy, and that is deliberate rather than incidental: the mask is fixed geometry that nothing differentiates, and :func:~cadjoint.flow.solver.step_for caches it on the configuration. A jnp array built during someone’s first (traced) call would be a tracer, and the cache would hand that tracer to every later call – which JAX reports as a leak. A concrete array cannot leak.

Parameters

Name	Type	Description	Default
shape	tuple[int, int, int]	(NX, NY, NZ) grid shape.	required

Returns

Name	Type	Description
	np.ndarray	Boolean wall mask, (NX, NY, NZ).