sphere in freestream Star CCM+

rayzcorp · March 24, 2013, 07:31

I am trying to simulate a simple sphere in freestream air flow of 40 m/sec in Star CCM+ to calculate the lift and drag coefficient. For this, I have a sphere.iges imported as surface mesh. While generating volume mesh, I keep getting an error "error in surface mesh of Region Region1: Surface is not closed".

Being new to this software, I'am not able to figure out where the problem is. Can someone please help me out on this ?

flotus1 · March 24, 2013, 11:16

Your geometry file is probably corrupted.
There are ways in CCM+ to clean up geometries (some tutorials cover this) but for a simple one like a sphere, I would rather build the geometry in CCM+ instead of repairing the imported geometry.

rayzcorp · March 26, 2013, 11:47

thank you Alex for your reply. Actually the geometry is not only a sphere...but a sphere with an ring with x diameter, offset parallely to the plane passing through it's centre. So I decided creating the geometry in Catia. And thanks..the problem got solved.

But now I have another problem.

Is there any way I can export my volume mesh generated in Star ccm+ to Fluent? trimmer module has been used

March 24, 2013, 07:31	error in surface mesh of Region Region1: Surface is not closed".	#1
rayzcorp New Member Rohit Ray Join Date: Jun 2011 Location: India Posts: 4 Rep Power: 15	I am trying to simulate a simple sphere in freestream air flow of 40 m/sec in Star CCM+ to calculate the lift and drag coefficient. For this, I have a sphere.iges imported as surface mesh. While generating volume mesh, I keep getting an error "error in surface mesh of Region Region1: Surface is not closed". Being new to this software, I'am not able to figure out where the problem is. Can someone please help me out on this ? Last edited by rayzcorp; March 24, 2013 at 10:16. Reason: title change

March 26, 2013, 11:47		#3
rayzcorp New Member Rohit Ray Join Date: Jun 2011 Location: India Posts: 4 Rep Power: 15	thank you Alex for your reply. Actually the geometry is not only a sphere...but a sphere with an ring with x diameter, offset parallely to the plane passing through it's centre. So I decided creating the geometry in Catia. And thanks..the problem got solved. But now I have another problem. Is there any way I can export my volume mesh generated in Star ccm+ to Fluent? trimmer module has been used Last edited by rayzcorp; March 26, 2013 at 11:54. Reason: wrong data

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March 24, 2013, 11:16		#2
flotus1 Super Moderator Alex Join Date: Jun 2012 Location: Germany Posts: 3,427 Rep Power: 49	Your geometry file is probably corrupted. There are ways in CCM+ to clean up geometries (some tutorials cover this) but for a simple one like a sphere, I would rather build the geometry in CCM+ instead of repairing the imported geometry.