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  • FLUENT - Flow over an Airfoil- Step 7

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Cd =  (Cd)pressure + (Cd)skin friction

where

(Cd)pressure is due to pressure force.

(Cd)skin friction is due to viscous force.

Indeed, we see that the (Cd)skin friction is zero because of the inviscid model.

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In reality, (Cd)skin friction has biggest contribution to drag but ignored because of the inviscid model that we specify. (Cd)pressure should be zero, but not because of inaccuracies and numerical dissipation.


Before we can make any conclusion about the accuracy of our result, we should always make validation check. The most common validation step is grid convergence check.

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