[ICEM] automatically created parts...

jc_muaddib · June 25, 2010, 07:11

Hi guys!
I need some enlightenments!

When I define a mesh with a relatively poor quality, ICEM creates some parts containing volume elements of the mesh... What's the meaning of this operation? Can it be a problem for simulating it with fluent?
Thanks a lot

PSYMN · June 29, 2010, 12:19

If you don't create a material point, ICEM CFD will try to create one for each zone. It is acceptable to fluent but may not be what you want to simulate.

You could try creating a material point yourself, then these won't happen. Instead, the mesh in these other regions would be deleted.

In your case, I am guessing you have coarse mesh that is creating some triangle boxes or something that traps volume mesh in tight areas. These trapped clumps are each being put into their own "CREATED_MATERIAL_*" part. Your best bet to fix that would be better geometry or finer mesh in those areas.

A picture would help me diagnose.

jc_muaddib · June 30, 2010, 05:38

Thanks for the answer!
Ok I guessed that it was something related to a coarse mesh problem, but I didn't get why ICEM did it. Now it's clear in my mind, thanks!
I tried to simulate and as you say it didn't generate an error in fluent, but the results weren't really what I expected... At the end I have refined my mesh and I am working with this new one on my simulation.

Best regards

June 25, 2010, 07:11	automatically created parts...	#1
jc_muaddib New Member anonymous Join Date: Mar 2010 Posts: 8 Rep Power: 16	Hi guys! I need some enlightenments! When I define a mesh with a relatively poor quality, ICEM creates some parts containing volume elements of the mesh... What's the meaning of this operation? Can it be a problem for simulating it with fluent? Thanks a lot

June 29, 2010, 12:19	Created_material	#2
PSYMN Senior Member Simon Pereira Join Date: Mar 2009 Location: Ann Arbor, MI Posts: 2,663 Blog Entries: 1 Rep Power: 47	If you don't create a material point, ICEM CFD will try to create one for each zone. It is acceptable to fluent but may not be what you want to simulate. You could try creating a material point yourself, then these won't happen. Instead, the mesh in these other regions would be deleted. In your case, I am guessing you have coarse mesh that is creating some triangle boxes or something that traps volume mesh in tight areas. These trapped clumps are each being put into their own "CREATED_MATERIAL_*" part. Your best bet to fix that would be better geometry or finer mesh in those areas. A picture would help me diagnose.

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June 30, 2010, 05:38		#3
jc_muaddib New Member anonymous Join Date: Mar 2010 Posts: 8 Rep Power: 16	Thanks for the answer! Ok I guessed that it was something related to a coarse mesh problem, but I didn't get why ICEM did it. Now it's clear in my mind, thanks! I tried to simulate and as you say it didn't generate an error in fluent, but the results weren't really what I expected... At the end I have refined my mesh and I am working with this new one on my simulation. Best regards