different void-fraction value between tet- and hexa CFD-meshes

Submitted by EDW on Thu, 02/09/2012 - 14:49

Dear all,

is the void-fraction (centre) model valid for both - tet- and hex CFD-Meshes? We were performing some tests and get reasonable results for tet CFD-meshes while for a hexahedron CFD-mesh the void-fraction and therefore the fluid flow is not computed as expected.

thank you!

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ckloss's picture

ckloss | Thu, 02/09/2012 - 16:04

Hi edw,

generally the "void-fraction (centre) model" is valid when Vparticle << Vcell (one can argue what the criterion for "<<" is ). This should be independant of the tet/hex/whatever form the cell has. Probably your tet and hex cells have different volume?

Cheers, Christoph