Solution not accurate, can't figure it out

Frozenguy · March 8, 2015, 01:56

I am a student learning to use Ansys and cannot explain my lack of accuracy.

I have modeled a NACA 0012 airfoil. Lots of published data on this so I can compare.

I am getting Cl of 0.72 when I should get Cl of ~0.45

My mesh orthogonally quality is about 0.44.

I am running inviscid, with energy equation on.
fluid is air and is ideal-gas-law for what I assume is 'compressible' because I'm running at a mach 0.4 at 4 deg AoA.

Is my problem in mesh or in my solution set up?

Thank you for your help!

Peter

fresty · April 29, 2015, 13:42

If you're still stuck with this, please, post some images of the mesh and model for better understanding.

March 8, 2015, 01:56	Solution not accurate, can't figure it out	#1
Frozenguy New Member Peter Join Date: Mar 2015 Posts: 1 Rep Power: 0	I am a student learning to use Ansys and cannot explain my lack of accuracy. I have modeled a NACA 0012 airfoil. Lots of published data on this so I can compare. I am getting Cl of 0.72 when I should get Cl of ~0.45 My mesh orthogonally quality is about 0.44. I am running inviscid, with energy equation on. fluid is air and is ideal-gas-law for what I assume is 'compressible' because I'm running at a mach 0.4 at 4 deg AoA. Is my problem in mesh or in my solution set up? Thank you for your help! Peter

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April 29, 2015, 13:42		#2
fresty Senior Member Join Date: Aug 2014 Location: UK Posts: 213 Rep Power: 13	If you're still stuck with this, please, post some images of the mesh and model for better understanding.