Angle of attack not changed
 

Hi Foamers

I am simulating the flow over NACA23012 and it seems that when i change the angle of attack i am getting the same results. for example i changed from 0 deg to 5 deg using the Velocity*cos(angle) in x direction and Velocity*sin(angle) for y direction but the results seems to be the same even after i defined the angle of attack ..weird............. Might my inlet faces....what do you think?

Any suggestions......?

Thanks

What does your computational domain look like? What other boundary conditions do you have besides the velocity inlet?
A sketch or even a screenshot might be helpful.

And which soler are you using?

Thanks for reply

below i attached my sketch and sorry for the poor quality but you can understand ... I am using k omega sst and simpleFoam. solver
the wall represents my domain ... The inlet is defined 10 meters away from the wall and the outlet is defined 15 m away from the trailing edge.......

Thanks again

And the chord length is? I mean, if the chord is 1m in length I believe the boundaries are too close. They should be at approximately 20c away.
Something else, I don't know how openfoam works, but you should check whether it uses angles in degrees or in rads.

Just like I thought...

The straight boundaries (symmetry I guess) at the top and bottom of your domain guide the flow towards an AoA of 0°. No matter what you specify at the inlet.

Yes for AOA study you should modify domain to circular at inlet and boundaries should be placed at 15-20 C at inlet and 25-30 C at outlet.