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why the moment coefficient always positive..

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Old   November 3, 2009, 01:24
Default why the moment coefficient always positive..
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i am simulate the airfoil. but the moment coefficient always in positive magnitude..i using fluent cfd experimental data. the moment coeffcient always in negative magnitude..where my mistake occured. please help me..thanks
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Old   November 7, 2009, 21:49
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Dear friends:
How to define your momentume coefficient.
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