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-   -   Unateady flow over airfoil (http://www.cfd-online.com/Forums/main/103359-unateady-flow-over-airfoil.html)

mahzad June 18, 2012 10:44

Unateady flow over airfoil
 
Hi every one
I am simulating an airfoil with plunge oscillation and the airfoil, when it has natural shedding in an incompressible low Re flow. The flow is unsteady and I wanna calculate Cp at different times(some selected time steps). Now I have some questions:
1) when I want to calculate cp in a special time for airfoil with natural shedding, can I use the simple formula for calculating Cp? I mean Cp=(p-p_inf)/q which P_inf is the pressure in the far field boundary!
2) when I am applying force oscillation, for example plunge oscillation, how can I calculate Cp again?

does anyone know how to calculate Cp in this case?
Thanks for any words!


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