CFD Online Discussion Forums - oscillation of the pressure coefficient! why?

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nomrodd

June 29, 2009 14:17

oscillation of the pressure coefficient! why?

1 Attachment(s)

hi,

after a steady state simulation around a NACA 4415 airfoil i have plotted the cp_polar (the plot is attached) and noticed a oscillation of the pressure coefficient cp!
the used turbulence model was SST!

what may be the reasons for that oscillation?

Thanks!

ghorrocks

June 29, 2009 18:34

Hi,

My first guess is facetting of the geometry. You need a smoother shape. Second guess is incomplete convergence.

Glenn Horrocks

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