CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

How to determine time-averaged turbulent kinetic energy in LES?

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

LinkBack Thread Tools Search this Thread Display Modes
Old   October 27, 2020, 06:27
Default How to determine time-averaged turbulent kinetic energy in LES?
New Member
Join Date: Nov 2019
Posts: 1
Rep Power: 0
jaspera is on a distinguished road
Hi everyone,

I am performing a Large Eddy Simulation and I am interested in determining the time-averaged turbulent kinetic energy in the domain. I have read in the forum that to determine the total turbulent kinetic energy, I should add the resolved part of the TKE and the part of the sgs-model. I believe the resolved part of the turbulent kinetic energy can be achieved by the following: TKE_resolved = 1/2 * trace(UPrime2Mean) = 1/2*(UPrime2Mean_xx + UPrime2Mean_yy + UPrime2Mean_zz). Furthermore, the turbulent kinetic energy due to the sgs-model should be given from the turbulenceProperties_k file. Then adding these quantities should give the total turbulent kinetic energy: TKE_total = TKE_resolved + TKE_sgs

I was wondering if this approach is correct and if the total turbulent kinetic energy achieved by this approach is the instantaneous TKE or is this already the time-averaged TKE?

Thanks in advance for your help.
jaspera is offline   Reply With Quote


les, tke

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
courant number increases to rather large values 6863523 OpenFOAM Running, Solving & CFD 21 November 10, 2019 10:14
pimpleDyMFoam computation randomly stops babapeti OpenFOAM Running, Solving & CFD 5 January 24, 2018 05:28
LES unresolved turbulent kinetic energy balrog_f CFX 0 June 27, 2017 04:32
dynamic Mesh is faster than MRF???? sharonyue OpenFOAM Running, Solving & CFD 14 August 26, 2013 07:47
LES: mean velocity and turbulent kinetic energy MET FLUENT 8 December 8, 2006 05:08

All times are GMT -4. The time now is 06:25.