Calculating the Coefficient of Lift and Drag at various angles of attack in ANSYS

AlfredOlooAlfredOloo KenyaMember

Hi,

I want to plot a graph of Coefficient of Drag for a 3D airfoil at various Angles of Attack.

I have done a simulation in ANSYS FLUENT with the Angle of Attack as the INPUT PARAMETER and the Drag force as the OUTPUT PARAMETER. 

I should be using the formula shown below within the PARAMETER SET....

 

MY QUESTION is this, what should I include as my reference area (S)? And how do you calculate it for various AoA?

 

Thank you.

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