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-   -   Drag levels double after switching to transient (https://www.cfd-online.com/Forums/fluent/117944-drag-levels-double-after-switching-transient.html)

MachZero May 17, 2013 14:56

Drag levels double after switching to transient
 
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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