buoyantSimpleFoam velocity oszillation 1.6-ext -- CFD Online Discussion Forums

May 12, 2011, 03:56

buoyantSimpleFoam velocity oszillation 1.6-ext

preibie

Member

Stefan

Join Date: Jun 2009

Posts: 67

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Hallo user ans developer of OpenFOAM 1.6-ext,

I want to simulate a room without any inlets and outlets only with a heat source on the ground. I choose the buoyantSimpleFoam solver. The steps I had done:

build and mesh the domain with Gambit
checkMesh OK (nonOrthogonality max = 63)
buoyantSimpleFoam: after 200 Iterations there are nonphysical oszillations (+-0.04 m/s) in the velocity fild (picture)
simpleFoam: same mesh the oszilations are very low (+- 1e-7) (picture)

Is this a problem with the mesh ore with buoyantSimpleFoam?

Preibie

Attached Images

	buoyantSimpleFoam.jpg (92.7 KB, 35 views)
	simpleFoam.jpg (87.2 KB, 27 views)

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