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when,Ma=0.95,problems of airfoil compution in cfx

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Old   May 24, 2005, 11:04
Default when,Ma=0.95,problems of airfoil compution in cfx
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zuozicheng
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hi all

when Ma=0.95, I am computing an airfoil with a gap , Phiscal time scale=0.005, farfield rule=30 meters , the normal pressure force result is not converging , the transonic computing is so hard in cfx ,and how do I deal with it, my friends, help me!!!
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Old   May 24, 2005, 18:27
Default Re: when,Ma=0.95,problems of airfoil compution in
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Glenn Horrocks
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Hi,

Start off with a simpler simulation using possibly upwind differencing, a zero equation turbulence model and double precision numbers. Use that simulation as an initial condition for your final run to convergence with high res differencing and a better turbulence model.

Transonic simulations are always tricky to converge. There area a few other suggestions in the documentation.

Regards, Glenn
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Old   May 25, 2005, 07:18
Default Re: when,Ma=0.95,problems of airfoil compution in
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zuozicheng
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than you very much !
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