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

June 29, 2009, 15:17

oscillation of the pressure coefficient! why?

nomrodd

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alex

Join Date: Jun 2009

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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!

Attached Images

cP_NACA_4415.jpg (86.9 KB, 83 views)

June 29, 2009, 19:34		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 18,001 Rep Power: 146	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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