Hi,

I think I'm missing something about the "cell reynolds number".. Is this simply an indication of the calculation stability, or can it be used to infer the flow regime?

My problem is the following: I'm running a CFD simulation in which I really don't know whether I'll get a laminar or turbulent regime. Now would it be possible to solve the problem using Navier-Stokes, then consider the Cell reynolds number, and then pass to k-epsilon in the case a turbulent flow is detected?

Thanks in advance for any help!

[mahderezvan]

Originally Posted by Gavrilo Bozovic
;54042

Hi,

I think I'm missing something about the "cell reynolds number".. Is this simply an indication of the calculation stability, or can it be used to infer the flow regime?

My problem is the following: I'm running a CFD simulation in which I really don't know whether I'll get a laminar or turbulent regime. Now would it be possible to solve the problem using Navier-Stokes, then consider the Cell reynolds number, and then pass to k-epsilon in the case a turbulent flow is detected?

Thanks in advance for any help!

Hi. I have the same issues. I want to show that the flow is turbulence through the cell Reynolds number. Could anyone answer what is the cell Reynolds number for turbulence flow?

[FMDenaro]

Originally Posted by mahderezvan

Hi. I have the same issues. I want to show that the flow is turbulence through the cell Reynolds number. Could anyone answer what is the cell Reynolds number for turbulence flow?

It has nothing to do with the type of regime, it is simply a numerical parameter that is locally computed by means of the local computationla grid size and local velocity. It is relevant to assess the quality of the numerical resolution and has also relevance to avoid numerical oscillation with some central scheme.