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why dynamic mesh method give wrong results?

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Old   September 22, 2009, 21:06
Default why dynamic mesh method give wrong results?
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Wei Yang
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For conventional CFD study on airfoil, the air is moving, the airfoil is steady. It can give considerable results and acceptable.

In reality, the airfoil flies in air. So, I use dynamic mesh method modeling the motion.

But the results confused me. The lift is a bit smaller and the drag is 3 or 5times of conventional CFD method. why?

can anyone describe the reason?

How can I get the right result using dynamic mesh method?
Thanks!
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