Maximum cell skewness

atothep · July 4, 2011, 10:27

Running a simulation and once convergences has been achieved i click on check case and get a message saying that my mesh cell skewness is greater than 0.98 and that i need to improve the mesh. can someone define what this means pleas?

Alex

swiss_zhang · August 4, 2011, 08:38

first Question:

Which software did you use for the mesh? ICEM or AnsysMeshing.

If you used AnsysMeshing to generate the mesh, the Skwness must be lower than 0.95 (For ICEM, i am not queite sure, but you can also do followings), so that avoid the bad mesh quality.

Try to do followings:

1: Try to smooth the mesh with Smooth Option: Fine; but do not change the mesh size. After meshing, check the mesh quality skwness again. If the mesh quality is still higher than 0.95, then

2: reduce the mesh size (Surface mesh size and groth rate ratio), but still with Mesh Option: Fine.

atothep · August 4, 2011, 08:48

I am using AnsysMeshing. I have managed to improve the mesh quality to around 0.85 cell skewness I would like to improve the quality further.

July 4, 2011, 10:27	Maximum cell skewness	#1
atothep New Member Alex Poyser Join Date: Jun 2011 Posts: 19 Rep Power: 15	Running a simulation and once convergences has been achieved i click on check case and get a message saying that my mesh cell skewness is greater than 0.98 and that i need to improve the mesh. can someone define what this means pleas? Alex

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August 4, 2011, 08:38		#2
swiss_zhang New Member Zhang Yang Join Date: Jun 2011 Location: Zürich Posts: 28 Rep Power: 16	first Question: Which software did you use for the mesh? ICEM or AnsysMeshing. If you used AnsysMeshing to generate the mesh, the Skwness must be lower than 0.95 (For ICEM, i am not queite sure, but you can also do followings), so that avoid the bad mesh quality. Try to do followings: 1: Try to smooth the mesh with Smooth Option: Fine; but do not change the mesh size. After meshing, check the mesh quality skwness again. If the mesh quality is still higher than 0.95, then 2: reduce the mesh size (Surface mesh size and groth rate ratio), but still with Mesh Option: Fine.

August 4, 2011, 08:48		#3
atothep New Member Alex Poyser Join Date: Jun 2011 Posts: 19 Rep Power: 15	I am using AnsysMeshing. I have managed to improve the mesh quality to around 0.85 cell skewness I would like to improve the quality further.