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Negative Drag ?????

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Old   May 16, 2002, 11:57
Default Negative Drag ?????
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aydin
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I am running a turbulent incompressible flow on an airfoil. for angle of attack of 10 or more degrees Spalart almaras model gives negative drag. should I modify turbulent parameters? or any idea???
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Old   May 16, 2002, 15:39
Default Re: Negative Drag ?????
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Sergei
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Are yours force vectors defined right?
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Old   May 17, 2002, 01:59
Default Re: Negative Drag ?????
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aydin
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yes...
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Old   May 17, 2002, 06:13
Default Re: Negative Drag ?????
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Andrew Parker
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I have been modelling airfoils for a while for my final year project, it is defiantly your force vectors-sorry.

Andy
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