[chitharenjan]

Hi,

My question is regarding the prediction of turbulence (intensity and transition) in computation, which is a new area to me.

I know that there are many turbulent models like Spalart-Allmaras, k-epsilon, k-omega etc. All these are available in commercial packages including fluent with many input parameters. One important user input there is turbulence intensity, which I believe is a measure of free-stream turbulence level.

If that is the case, are these models sufficient to capture the additional turbulent intensity created in a domain ? For example, if a geometry contains wall roughness or flow reattachment (which are known examples of turbulent stimulation), will the models correctly account for these induced turbulence ?

Sorry if it was silly question, but I want to make sure that, giving a certain intensity level at the beginning does not restrict the computations from capturing the induced turbulence.

Thanks in advance and waiting for a reply.