[snappyHexMesh] Problem with extrudeMesh sHM 2D airfoil mesh

ssss · September 1, 2014, 04:33

Hi foamers,

I'm trying to make a 2D mesh of an airfoil. First I make a square blockMesh as explained in the openfoam guide. And then I run the following commands

Code:

foamClearPolyMesh
m4 constant/polyMesh/blockMeshDict.m4 > constant/polyMesh/blockMeshDict
blockMesh
transformPoints -translate "(0 0 -0.5)"
snappyHexMesh -overwrite
flattenMesh
extrudeMesh

All runs okay except that if I run snappyHexMesh, this is the output of extrudeMesh (the bounding box is incorrect). Even changing between back and front in the extrudeDict doesn make difference.

Code:

Mesh bounding box : (-10 -10 0) (10 10 1)

And if I don't run snappy before extrudeMesh I get the following output(the bounding box is correct).

Code:

Mesh bounding box : (-10 -10 -0.5) (10 10 0.5) //correct

Anyone knows what happens? Thank you

elvis · September 1, 2014, 09:55

Hi,

read the "final project" documentation by Alejandro Roger Ull
http://www.cfd-online.com/Forums/ope...gear-pump.html
->The work consists on meshing the geometry with snappyHexMesh in parallel and extruding it with extrudeMesh to make it two-dimensional.
I hope it can be a good guideline for your work.

ssss · September 1, 2014, 14:12

Quote:

Originally Posted by elvis

Hi,

read the "final project" documentation by Alejandro Roger Ull
http://www.cfd-online.com/Forums/ope...gear-pump.html
->The work consists on meshing the geometry with snappyHexMesh in parallel and extruding it with extrudeMesh to make it two-dimensional.
I hope it can be a good guideline for your work.

Thank you very much elvis , I think I found how to do it. Thank you

September 1, 2014, 04:33	Problem with extrudeMesh sHM 2D airfoil mesh	#1
ssss Senior Member anonymous Join Date: Aug 2014 Posts: 205 Rep Power: 13	Hi foamers, I'm trying to make a 2D mesh of an airfoil. First I make a square blockMesh as explained in the openfoam guide. And then I run the following commands Code: foamClearPolyMesh m4 constant/polyMesh/blockMeshDict.m4 > constant/polyMesh/blockMeshDict blockMesh transformPoints -translate "(0 0 -0.5)" snappyHexMesh -overwrite flattenMesh extrudeMesh All runs okay except that if I run snappyHexMesh, this is the output of extrudeMesh (the bounding box is incorrect). Even changing between back and front in the extrudeDict doesn make difference. Code: Mesh bounding box : (-10 -10 0) (10 10 1) And if I don't run snappy before extrudeMesh I get the following output(the bounding box is correct). Code: Mesh bounding box : (-10 -10 -0.5) (10 10 0.5) //correct Anyone knows what happens? Thank you

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September 1, 2014, 09:55		#2
elvis Senior Member Elvis Join Date: Mar 2009 Location: Sindelfingen, Germany Posts: 620 Blog Entries: 6 Rep Power: 24	Hi, read the "final project" documentation by Alejandro Roger Ull http://www.cfd-online.com/Forums/ope...gear-pump.html ->The work consists on meshing the geometry with snappyHexMesh in parallel and extruding it with extrudeMesh to make it two-dimensional. I hope it can be a good guideline for your work.