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Forum: Main CFD Forum

June 21, 2017, 11:21

Replies: 5

Transient RANS Simulation

Views: 2,997

Posted By FMDenaro

Yes, I agree that a RANS that does not drive the...

Yes, I agree that a RANS that does not drive the residuals to vanish has somehow a URANS-like behaviour. This is because URANS is nothing else that a RANS where the time derivatives are added....

Forum: Main CFD Forum

May 8, 2014, 14:37

Replies: 5

Transient RANS Simulation

Views: 2,997

Posted By FMDenaro

the URANS is based on a particular decomposition,...

the URANS is based on a particular decomposition, the averaged field is time dependent in terms of external forcing frequency (as in the engine) or low frequency as vortex shedding behind a bluff...

Forum: Main CFD Forum

May 8, 2014, 12:09

Replies: 5

Transient RANS Simulation

Views: 2,997

Posted By FMDenaro

Think about the compression/expansion flow cycle...

Think about the compression/expansion flow cycle in an engine chamber. At each time (or crank angle), the URANS provides the solution that has the meaning of representing an "ensemble average" of N...

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