CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM

Modification of turbulent kinetic energy generation term

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 21, 2022, 04:02
Default Modification of turbulent kinetic energy generation term
  #1
QMW
New Member
 
Qi
Join Date: Feb 2021
Posts: 7
Rep Power: 5
QMW is on a distinguished road
Hello everyone!
I am a beginner of OpenFoam.In the modeling of the generation term of the turbulent kinetic energy equation in the turbulence model, I want to introduce a velocity divergence, so that the turbulent kinetic energy will increase sharply in theory when the over-excited wave flow ( because the severe compression of the shock wave will lead to a large velocity divergence ). However, I did not find this phenomenon in the verification, and I was very confused about this. At a moment, it was my code and the distribution nephogram of the turbulent kinetic energy. The model was Hifire-5, with a flow of 8 Mach and a shock wave at the head.

volScalarField::Internal G
(
this->GName(),

nut*
sqrt(2.0)*mag(symm(fvc::grad(this->U_)))*
sqrt(2.0*magSqr(skew(fvc::grad(this->U_))))
-(2/3)*(this->k_)*(fvc::div(this->U_))

);
QMW is offline   Reply With Quote

Old   August 21, 2022, 04:08
Default
  #2
QMW
New Member
 
Qi
Join Date: Feb 2021
Posts: 7
Rep Power: 5
QMW is on a distinguished road
Here is the picture of k distribution
Attached Images
File Type: jpg k.jpg (71.8 KB, 9 views)
QMW is offline   Reply With Quote

Reply

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
Energy equation - where is the turbulent kinetic energy? usv001 OpenFOAM Programming & Development 1 January 25, 2022 15:04
Interpretation of turbulent kinetic energy chmurillor FLUENT 0 June 30, 2013 17:32
Smagorinsky term in SGS kinetic energy equation Ivan Main CFD Forum 3 January 21, 2013 15:22
A trouble with Turbulent Kinetic energy calculation agoshmc4u Main CFD Forum 0 February 29, 2012 13:39
ATTENTION! Reliability problems in CFX 5.7 Joseph CFX 14 April 20, 2010 15:45


All times are GMT -4. The time now is 22:44.