[ANSYS Meshing] Effect of Symmetry BC on results

ali.qasim · May 19, 2012, 11:51

Please refer to this thread I had going in the FLUENT forum.

Basically, for an airfoil analysis (inviscid model), the presence of the symmetry BC on the two sides of the C-mesh gave bad results for the lift coefficient (40% deviation from wind tunnel data), while changing it to inlet gave good results (within 5%).

Did someone experience this before? And why did this happen?

Far · May 19, 2012, 12:04

Can you past the corresponding mesh files?

ali.qasim · May 19, 2012, 12:14

Quote:

Originally Posted by Far

Can you past the corresponding mesh files?

Sure. What extension should I save them as?

Far · May 19, 2012, 12:20

ICEM files, if they are created in ICEM.

ali.qasim · May 19, 2012, 12:22

Are these good?

May 19, 2012, 11:51	Effect of Symmetry BC on results	#1
ali.qasim New Member Ali Join Date: Apr 2012 Location: India Posts: 17 Rep Power: 14	Please refer to this thread I had going in the FLUENT forum. Basically, for an airfoil analysis (inviscid model), the presence of the symmetry BC on the two sides of the C-mesh gave bad results for the lift coefficient (40% deviation from wind tunnel data), while changing it to inlet gave good results (within 5%). Did someone experience this before? And why did this happen?

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May 19, 2012, 12:04		#2
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	Can you past the corresponding mesh files?

May 19, 2012, 12:20		#4
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	ICEM files, if they are created in ICEM.

May 19, 2012, 12:22		#5
ali.qasim New Member Ali Join Date: Apr 2012 Location: India Posts: 17 Rep Power: 14	Are these good?