CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > General Forums > Main CFD Forum

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

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   May 9, 2017, 01:22
Default what length scale should be used when calculating kolmogorov scale of fountain flow?
  #1
New Member
 
Join Date: Dec 2016
Posts: 4
Rep Power: 5
John-Lee is on a distinguished road
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?
Attached Images
File Type: png Fountain.jpg.png (72.2 KB, 26 views)
John-Lee is offline   Reply With Quote

Old   May 9, 2017, 03:16
Default
  #2
Senior Member
 
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 5,416
Rep Power: 58
FMDenaro has a spectacular aura aboutFMDenaro has a spectacular aura aboutFMDenaro has a spectacular aura about
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
FMDenaro is offline   Reply With Quote

Reply

Tags
fountain, kolmogorov scale

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Turbulence length scale and integral length scale rizhang CFX 2 April 22, 2016 08:22
Modelled Length Scale in SAS-SST Simulation jego Main CFD Forum 0 January 16, 2016 07:45
Calculating mass flow rate at multiphase flows Kuslo187 OpenFOAM Post-Processing 1 August 21, 2015 19:11
Interface treatment in turbulent model and its length scale. paka OpenFOAM Running, Solving & CFD 0 February 15, 2014 03:02
Integral Length Scale vs Turbulent Length Scale Scott Nordsen FLUENT 2 January 20, 2014 02:17


All times are GMT -4. The time now is 02:28.