How did YOU solve your skewness problem?

rjw · March 23, 2017, 22:54

Been getting the "skewness exceeds 0.98" error for my Fluent meshing pretty much regardless of what I do. Just curious to see what major steps I should be taking to troubleshoot this problem.

sina_mech · March 27, 2017, 01:57

If you're using ANSYS Meshing module, there are two solutions I would look into:

1- Try to increase the "Min size" of the mesh, which will lead to less-accurate mesh (in terms of matching with geometry), but it will decrease the skewness in edges and ...

2- Try to decrease the "Max face size" and "Max Size". It will increase the overall number of the cells! So, less skewness on edges1

LuckyTran · March 27, 2017, 08:32

Coarser grids do great things for reducing skewness.

Uniform grids are also helpful (make smallest cells bigger, and biggest cells smaller).

If you're using an automated mesher you don't have control over the mesh topology. But if you're using ICEM for example, you can change the block structure.

March 23, 2017, 22:54	How did YOU solve your skewness problem?	#1
rjw New Member Richard Join Date: Feb 2017 Posts: 12 Rep Power: 9	Been getting the "skewness exceeds 0.98" error for my Fluent meshing pretty much regardless of what I do. Just curious to see what major steps I should be taking to troubleshoot this problem.

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March 27, 2017, 01:57		#2
sina_mech Senior Member SinaJ Join Date: Nov 2009 Posts: 136 Rep Power: 16	If you're using ANSYS Meshing module, there are two solutions I would look into: 1- Try to increase the "Min size" of the mesh, which will lead to less-accurate mesh (in terms of matching with geometry), but it will decrease the skewness in edges and ... 2- Try to decrease the "Max face size" and "Max Size". It will increase the overall number of the cells! So, less skewness on edges1

March 27, 2017, 08:32		#3
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,674 Rep Power: 65	Coarser grids do great things for reducing skewness. Uniform grids are also helpful (make smallest cells bigger, and biggest cells smaller). If you're using an automated mesher you don't have control over the mesh topology. But if you're using ICEM for example, you can change the block structure.