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-   -   Steady versus Unsteady models!? (http://www.cfd-online.com/Forums/star-ccm/125083-steady-versus-unsteady-models.html)

Asatorae October 18, 2013 08:34

Steady versus Unsteady models!?
 
When precisely should I be using a steady model versus an unsteady model?

I get appropriate drag co-efficient's for a cylinder at Re~1E+4 using a steady approach, but values that don't match the experimentally accepted values when using time-averaged URANS.

Should I be using unsteady for all applications, or only when there is likely to be turbulence within the boundary layer and not the free stream / wake.

I want to go on to model aerofoils.

Any help is appreciated.

Cheers,

~Asa


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