- #1
MaxKang
- 20
- 0
Hello,
I came to know that a normal component of the viscous stress can exist at a solid surface for unsteady, compressible flows(though even in that case, the normal component of the viscous stress is typically much smaller than the tangential component). I tried googling it myself but could not find any relevant information.
To me, it seems that in calculating the aerodynamic force on an airfoil, the normal viscous stress contribution is completely ignored.
Can someone explain the difference between this normal viscous stress and a pressure?
I came to know that a normal component of the viscous stress can exist at a solid surface for unsteady, compressible flows(though even in that case, the normal component of the viscous stress is typically much smaller than the tangential component). I tried googling it myself but could not find any relevant information.
To me, it seems that in calculating the aerodynamic force on an airfoil, the normal viscous stress contribution is completely ignored.
Can someone explain the difference between this normal viscous stress and a pressure?