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vortex and lift, please help

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Old   June 7, 2006, 08:06
Default vortex and lift, please help
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hi all, when the computation was stable, i found that lift achieve its max at T/4 and 3T/4,but the min lift(approximately 0) don't at 2T/4 and 4T/4, T is the vortex shedding period.

would u please give me some idea about the relationship between vortex generation or dissipation and the change of lift.

thanx in advance kevin
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