Prism problem in ICEM CFD at inlet and outlet

benjaminhogan · October 24, 2014, 18:23

Hello,

Relatively new user looking at meshing a case for exterior aerodynamics of streamlined vehicles, in particular a wind tunnel validation study.

My problem is prism generation on the floor boundary not running to the inlet and outlets correctly. This causes the prisms to decrease to a small point which ultimately leads to terrible quality cells.

Please see the attached picture that I hope explains my issue. I am aware that the mesh appears quite coarse - I am just trying to eliminate the prism problem.

Any help or advice welcome.

Cheers!

Ben

mohammad · November 11, 2014, 06:55

If your geometry is not very complex, try using blocking...then you will have easy time with the prism layer

rolloblues · November 15, 2014, 12:17

Hi,

check the value of Max Prism Angle parameter under Global Prism Mesh Parameters. If you have 90 or less that may cause the error

October 24, 2014, 18:23	Prism problem in ICEM CFD at inlet and outlet	#1
benjaminhogan New Member Benjamin Hogan Join Date: Feb 2014 Location: Liverpool Posts: 8 Rep Power: 12	Hello, Relatively new user looking at meshing a case for exterior aerodynamics of streamlined vehicles, in particular a wind tunnel validation study. My problem is prism generation on the floor boundary not running to the inlet and outlets correctly. This causes the prisms to decrease to a small point which ultimately leads to terrible quality cells. Please see the attached picture that I hope explains my issue. I am aware that the mesh appears quite coarse - I am just trying to eliminate the prism problem. Any help or advice welcome. Cheers! Ben

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November 11, 2014, 06:55		#2
mohammad Senior Member mohammad Join Date: Dec 2010 Location: UK Posts: 245 Rep Power: 16	If your geometry is not very complex, try using blocking...then you will have easy time with the prism layer

November 15, 2014, 12:17		#3
rolloblues Member davide basso Join Date: Jan 2012 Posts: 48 Rep Power: 14	Hi, check the value of Max Prism Angle parameter under Global Prism Mesh Parameters. If you have 90 or less that may cause the error