InterFoam for open channel: Time step divergence -- CFD Online Discussion Forums

November 29, 2021, 09:01

InterFoam for open channel: Time step divergence

river_fish

New Member

Zürich

Join Date: Nov 2021

Posts: 5

Rep Power: 4

Hi everybody,

I'm trying to simulate open channel flow using InterFoam solver. When I set up the case with a simplified geometry (see below), the simulation runs without problem. Now for the real geometry, that includes a bend and a culvert section, the time step immediately diverges and the solution blows up. The boundary conditions for the two cases are identical and checkMesh results only in 1 failure (20 skewfaces) for the second case with complex geometry.

Any idea what possibly went wrong during upscaling?

Thanks a lot for your inputs, very much appreciated!

Attached Images

	simplified_case.png (105.4 KB, 15 views)
	case_complex_geometry.png (56.0 KB, 15 views)

Tags

interfoam, upscale, velocity and pressure

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