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Negative Lift and Drag force problem

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Old   February 22, 2015, 04:15
Default Negative Lift and Drag force problem
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Hello Every one,

I am doing simulation of an airfoil for both coupled flow and segregated flow separately. But I am having problem with Lift and Drag force calculation. It shows negative values. Would you please suggest me why this is happening.

I have used Mach no: 0.2, angle of attack = 0 degree, k-e turbulence model.

Your cooperation is highly appreciated.

Thanks,
Rakibul
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Old   February 24, 2015, 19:48
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9/10 problems with aero cases like this are mesh related, check your mesh.
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