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-   -   oscillation of the pressure coefficient! why? (http://www.cfd-online.com/Forums/cfx/65887-oscillation-pressure-coefficient-why.html)

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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