# Air Foil 2 D case

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 October 19, 2018, 13:18 Air Foil 2 D case #1 New Member   Arslan Join Date: Feb 2018 Location: Germany Posts: 5 Rep Power: 5 Dear All, I hope this message finds you in best of health and spirit. I am doing simulation for airfoil 2D case using snappyHexMesh. I am a little bit confused about type of computational domain. My airfoil is stationary and i have meshed it using snappyHexMesh. For 0 angle of attack square domain will work. If i want the airfoil to be at the same place for next angle of attack which is 5, so if i give in velocity vector (vcos5 and vsin5), the angle would be still zero or 5(square domain)? Is it compulsory to make a C domain then only i could work at different angle of attack.?

 October 29, 2018, 09:21 #2 Senior Member   Zander Meiring Join Date: Jul 2018 Posts: 125 Rep Power: 4 By using vertical and horizontal components for the inlet velocity, the result becomes more dependent on the top and bottom boundaries. It might be better to rather remesh the foil at different attack angles. Furthermore, I would personally recommend using blockMesh rather for an airfoil shape, as you're likely to get a better quality mesh.

 November 6, 2018, 13:12 3d wing #3 New Member   Arslan Join Date: Feb 2018 Location: Germany Posts: 5 Rep Power: 5 Hello all, i am working on 3D wing at 5 degree in square computational domain. I have small doubt regarding velocity vectors and lift and drag directions. As i have given 5 degrees to my wing in CAD. My inlet velocity is 1 m/s. Now do i need to give velocity also in x and y or (1 0 0) will work. Same question for lift and drag direction.

 Tags airfoil 2d, airfoil 3d, computational domain, snappy hex mesh

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