Ferziger and peric code for turbulent flow
 

Dear forum members, I was trying to use the code by peric on turbulent flow (according to the book by ferziger and peric)to analyze viscous flow around airfoil.I got some results for zero angle of attack.

But when I provide an angle of attack,the code seems to yield results only for one face of airfoil.
Can anyone please suggest me how to overcome this?