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

John-Lee · May 9, 2017, 00:22

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, 02:16

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

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Turbulence length scale and integral length scale	rizhang	CFX	2	April 22, 2016 07:22
Modelled Length Scale in SAS-SST Simulation	jego	Main CFD Forum	0	January 16, 2016 06:45
Calculating mass flow rate at multiphase flows	Kuslo187	OpenFOAM Post-Processing	1	August 21, 2015 18:11
Interface treatment in turbulent model and its length scale.	paka	OpenFOAM Running, Solving & CFD	0	February 15, 2014 02:02
Integral Length Scale vs Turbulent Length Scale	Scott Nordsen	FLUENT	2	January 20, 2014 01:17

May 9, 2017, 02:16		#2
FMDenaro Senior Member Filippo Maria Denaro Join Date: Jul 2010 Posts: 6,768 Rep Power: 71	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