[snappyHexMesh] snappyHexMesh on a multiple region blockMesh

blais.bruno · November 17, 2014, 16:54

Hello everyone.

To quickly mesh an impeller rotating in a stirred tank, I would like to use snappyHexMesh on top of a structure blockMesh which encompasses the AMI interface.

I Have already made the structured blockMesh that has the AMI patches and a rotating cylinder of fluid in the middle. Everything is fine.

However, when comes to time to use snappyHexMesh, if the point "inside" that I specify is within the rotor region, the entire stator region. It seems that snappyHexMesh only detects the region in which the locationInMesh point is in.

Do any of you know a work around to this issue? (namely keeping the two regions...)

Cheers,
Bruno

be_inspired · February 17, 2015, 06:40

http://www.cfd-online.com/Forums/ope...tml#post532134

I think your problem is quite similar to mine in some points.
Now I am dealing with rotorDiskSource but I have obtained a valid wind turbine mesh with the blades meshed and so. You will need a cylinder STL geometry to define that all the cells inside that cylinder will be a new cellZone.

Inside surfaceRefinement:

rotating

{

level (1 2);

cellZone rotating;

faceZone rotating;

cellZoneInside insidePoint;

insidePoint (0 0.1 0.5);

November 17, 2014, 16:54	snappyHexMesh on a multiple region blockMesh	#1
blais.bruno Member Bruno Blais Join Date: Sep 2013 Location: Canada Posts: 64 Rep Power: 13	Hello everyone. To quickly mesh an impeller rotating in a stirred tank, I would like to use snappyHexMesh on top of a structure blockMesh which encompasses the AMI interface. I Have already made the structured blockMesh that has the AMI patches and a rotating cylinder of fluid in the middle. Everything is fine. However, when comes to time to use snappyHexMesh, if the point "inside" that I specify is within the rotor region, the entire stator region. It seems that snappyHexMesh only detects the region in which the locationInMesh point is in. Do any of you know a work around to this issue? (namely keeping the two regions...) Cheers, Bruno

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February 17, 2015, 06:40		#2
be_inspired Senior Member M. Montero Join Date: Mar 2009 Location: Madrid Posts: 155 Rep Power: 17	http://www.cfd-online.com/Forums/ope...tml#post532134 I think your problem is quite similar to mine in some points. Now I am dealing with rotorDiskSource but I have obtained a valid wind turbine mesh with the blades meshed and so. You will need a cylinder STL geometry to define that all the cells inside that cylinder will be a new cellZone. Inside surfaceRefinement: rotating { level (1 2); cellZone rotating; faceZone rotating; cellZoneInside insidePoint; insidePoint (0 0.1 0.5);