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Drag levels double after switching to transient

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May 17, 2013, 15:56	Drag levels double after switching to transient	#1
MachZero Member Join Date: Aug 2011 Posts: 89 Rep Power: 15	I am encountering a problem where I am calculating drag over a somewhat bluff body. There is separated flow in the region behind the object and vortex shedding ensues. When I simulate this in steady state mode, the drag oscillated due to the shedding but I get an average close to experiment. When I switch to transient after I start calculated drag still oscillates but the magnitude of average deaf roughly doubles. Anyone seen this before? We can't figure this out on my end

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drag coefficient, steady and unsteady state, transient analysis

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