what length scale should be used when calculating kolmogorov scale of fountain flow?

John-Lee · May 9, 2017, 01:22

I want to use the LES and Laminar model in Fluent to simulate a fountain flow as shown in the attachment. So a fine mesh is needed. The Kolmogorov scale can be estimated by L (length scale) and Re (Reynolds number). My question is what is the length scale I should use when calculating Kolmogorov scale of the fountain flow?

FMDenaro · May 9, 2017, 03:16

Do you want to compare LES to a laminar (no-model) solution?

The Kolmogorov lenght scale depends on the physical viscosity and dissipation http://www.eng.utah.edu/~mcmurtry/Turbulence/turblt.pdf

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May 9, 2017, 03:16		#2
FMDenaro Senior Member Filippo Maria Denaro Join Date: Jul 2010 Posts: 6,882 Rep Power: 73	Do you want to compare LES to a laminar (no-model) solution? The Kolmogorov lenght scale depends on the physical viscosity and dissipation http://www.eng.utah.edu/~mcmurtry/Turbulence/turblt.pdf