[snappyHexMesh] SnappyHexMesh and cell orientation region-wise

heksel8i · July 20, 2015, 12:40

Hey!

I have been wondering if it is possible to force the cell orientation inside stl-surfaces different from the background blockmesh orientation? This in case I know that at some part of my domain I have flow not aligned with the background mesh. Naturally a smooth change back to background orientation is needed close to the interface and is totally expected.

If this is not possible by some trick, then most probably I have to split the background blockmesh domain into pieces and orient the blocks correctly before applying snapping...

Regis_ · July 22, 2015, 16:29

I am facing the exact same problem. Hekseli, before someone enlighten us if this is possible, could you please explain in more details the workaround you mentioned?

heksel8i · July 23, 2015, 02:15

Hey!

I think the only way to overcome this is to design the background mesh in a way that the cells are orientated properly in it and then apply SHM.

I am now creating the background structured mesh with gmsh.

July 20, 2015, 12:40	SnappyHexMesh and cell orientation region-wise	#1
heksel8i Member hekseli Join Date: Mar 2013 Posts: 49 Rep Power: 13	Hey! I have been wondering if it is possible to force the cell orientation inside stl-surfaces different from the background blockmesh orientation? This in case I know that at some part of my domain I have flow not aligned with the background mesh. Naturally a smooth change back to background orientation is needed close to the interface and is totally expected. If this is not possible by some trick, then most probably I have to split the background blockmesh domain into pieces and orient the blocks correctly before applying snapping...

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July 22, 2015, 16:29		#2
Regis_ New Member Regis Join Date: Jan 2012 Posts: 24 Rep Power: 14	I am facing the exact same problem. Hekseli, before someone enlighten us if this is possible, could you please explain in more details the workaround you mentioned?

July 23, 2015, 02:15		#3
heksel8i Member hekseli Join Date: Mar 2013 Posts: 49 Rep Power: 13	Hey! I think the only way to overcome this is to design the background mesh in a way that the cells are orientated properly in it and then apply SHM. I am now creating the background structured mesh with gmsh.