[Darius]

I ran two 3D simulations in CFX on NACA 23012 with 20 degrees angle of attack. One model was made in solidworks and then the airfoil was rotated 20 degrees and after that imported into the CFX simulation. In the CFX-pre expressions I didn't enter any angle of attack cuz it was already rotated.

The other model was made in DesignModular with the same dimensions and domain. The only different was that the airfoil was not rotated so in the CFX-Pre I applied the angle of attack in expressions to get lift and drag.

Apart from the airfoil rotation and the expressions applied all the configurations such as domain, inlet pressure, outlet, speed, density and everything were the same, but I got completely different results out of the simulation.

I was expecting to get the same results cuz in practice they are the same.
Well the both simulation results did get even close to the wind tunnel testing result I made on the same airfoil with the same dimensions.

Any idea as why these two give different results?