Different results from similar quality cfx and ICEM meshes

Nick R · January 14, 2011, 02:25

Hi all,

I've created two meshes with the same geometry one in cfx and the other in ICEM. The mesh quality in both is nearly the same. However with the one from ICEM I get a floating point error whereas the one created in CFX converges nicely. I don't know what's the deal. Although I set the same Boundary Condition for both cases. Everthing else is exactly the same.
Both are unstructured meshes by the way.

Generally I get a lot of overflow (floating point) errors from ICEM meshes.
Should the boundary conditions be defined in ICEM or is it sufficient to do so in cfx solver *which is what I do after i import from ICEM*. Thanks for any comments in advance.

ghorrocks · January 15, 2011, 06:34

Assuming there is no error in your ICEM mesh, then your assessment that the mesh quality is almost the same is obviously not correct.

Nick R · January 16, 2011, 04:03

Thanks for the reply. Strangely I get this overflow error message with meshes from ICEM. I don't know what I'm doing wrong. The same geometry and boundary conditions for a mesh generated by cfx mesh work fine.

paulo · January 17, 2011, 07:48

Hello,

In your simulation's .out file there are mesh quality statistics. Try to compare them.

Best Regards,

Paulo Rocha

January 14, 2011, 02:25	Different results from similar quality cfx and ICEM meshes	#1
Nick R Senior Member Nick Join Date: Nov 2010 Posts: 126 Rep Power: 15	Hi all, I've created two meshes with the same geometry one in cfx and the other in ICEM. The mesh quality in both is nearly the same. However with the one from ICEM I get a floating point error whereas the one created in CFX converges nicely. I don't know what's the deal. Although I set the same Boundary Condition for both cases. Everthing else is exactly the same. Both are unstructured meshes by the way. Generally I get a lot of overflow (floating point) errors from ICEM meshes. Should the boundary conditions be defined in ICEM or is it sufficient to do so in cfx solver which is what I do after i import from ICEM. Thanks for any comments in advance.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Import Mesh from ICEM CFD to CFX	Andre Almeida	CFX	16	April 19, 2016 03:42
CFX and ICEM CFD - structured meshes	realanony87	CFX	10	May 15, 2009 05:17
ICEM and CFX report different number of elements	Chris Basciano	CFX	0	July 20, 2007 17:24
CFX mesh & ICEM	mike	CFX	3	April 27, 2006 15:27
ICEM 10 mesh scale foe CFX	Korsh Mik	CFX	2	October 7, 2005 09:07

January 15, 2011, 06:34		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,715 Rep Power: 143	Assuming there is no error in your ICEM mesh, then your assessment that the mesh quality is almost the same is obviously not correct.

January 16, 2011, 04:03		#3
Nick R Senior Member Nick Join Date: Nov 2010 Posts: 126 Rep Power: 15	Thanks for the reply. Strangely I get this overflow error message with meshes from ICEM. I don't know what I'm doing wrong. The same geometry and boundary conditions for a mesh generated by cfx mesh work fine.

January 17, 2011, 07:48		#4
paulo Member Paulo Alexandre Costa Rocha Join Date: Mar 2009 Posts: 71 Rep Power: 17	Hello, In your simulation's .out file there are mesh quality statistics. Try to compare them. Best Regards, Paulo Rocha