Does O.F support hybrid grids?

VSass · December 4, 2012, 04:28

Simple case, i have an unstructured,hybrid mesh to work on. I solve it with icoFoam and no matter the BCs or the time step or nu,Courant number reaches e+80 at the tenth time step it crashes.Am i doing something terribly wrong or it just can't handle the hybrid mesh?

Bernhard · December 4, 2012, 05:13

What is the output of the checkMesh utility. Is the mesh OK? OpenFOAM can handle arbitrarily shaped domains and polyhydral and unstructured meshes in general. So there is either something terribly wrong with your mesh, or the case set-up is wrong, there is no way to tell for the people here without more details.

VSass · December 4, 2012, 09:03

Well, checkMesh says "Faces not in upper triangular order" and everything else OK. Could this be the reason?

hjasak · December 6, 2012, 16:22

run renumberMesh and see what happens - maybe you have multiple faces between two cells.

Hrv

December 4, 2012, 04:28	Does O.F support hybrid grids?	#1
VSass Member VS Join Date: Nov 2012 Posts: 86 Rep Power: 14	Simple case, i have an unstructured,hybrid mesh to work on. I solve it with icoFoam and no matter the BCs or the time step or nu,Courant number reaches e+80 at the tenth time step it crashes.Am i doing something terribly wrong or it just can't handle the hybrid mesh?

December 6, 2012, 16:22		#4
hjasak Senior Member Hrvoje Jasak Join Date: Mar 2009 Location: London, England Posts: 1,907 Rep Power: 33	run renumberMesh and see what happens - maybe you have multiple faces between two cells. Hrv __________________ Hrvoje Jasak Providing commercial FOAM/OpenFOAM and CFD Consulting: http://wikki.co.uk

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December 4, 2012, 05:13		#2
Bernhard Senior Member Bernhard Join Date: Sep 2009 Location: Delft Posts: 790 Rep Power: 22	What is the output of the checkMesh utility. Is the mesh OK? OpenFOAM can handle arbitrarily shaped domains and polyhydral and unstructured meshes in general. So there is either something terribly wrong with your mesh, or the case set-up is wrong, there is no way to tell for the people here without more details.

December 4, 2012, 09:03		#3
VSass Member VS Join Date: Nov 2012 Posts: 86 Rep Power: 14	Well, checkMesh says "Faces not in upper triangular order" and everything else OK. Could this be the reason?