Computing Wall shear stress at each point on surface

[Bharathwaj Dharani]

Hello All,

I am carrying out a flow simulation on an airfoil and am working on post-processing the results. I am trying to compute the skin friction coefficient (Cf​) on the airfoil surface to identify flow separation and reattachment points. To do this, I need to compute the local wall shear stress (τw​).

Could you please provide guidance on the best way to compute wall shear stress at each point on the airfoil surface? 

Any alternative/quick method is appreciated too. 

Thank you,

Bharathwaj