[losiola]

hello Foamers ,
I am making a 2D airfoil simulation using open Foam and i want to calculate the aerodynamic performnce of the aifoil (Cd,Cl,Cm) for multiple angles of Attack .


How Can i set multiple angles of attack without having to rotate the airfoil and regenerate new mesh for evrytime?

[blackpingu]

You can change the internal field velocity vector in the 0-folder.

internalField uniform (0 0 0);

alpha=0

internalField uniform (1 0 0);

alpha = 45

internalField uniform (0.70710678118
0.70710678118
0);

[losiola]

Originally Posted by blackpingu

You can change the internal field velocity vector in the 0-folder.



alpha=0



alpha = 45

Thank you for the reply , But how about the Boundary conditions that i should use on top bottom and outlet since the flow may go with 45 ° for exemple this means i cant just use the symmetry boundary conditions on top and bottom ?

[blackpingu]

You can define it like in the damBreak tutorial:



atmosphere
{
type pressureInletOutletVelocity;
value uniform (0 0 0);
}

change the uniform to whatever angle you have

[mzzmrt]

It's better to make an "O grid" for such a case. So you can define the velocity vector (x, y, z) in u and use the same mesh for all AoA range...