CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Turbulence kinetic energy formula

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

LinkBack Thread Tools Display Modes
Old   January 25, 2007, 02:56
Default Turbulence kinetic energy formula
Posts: n/a
after i turn on the turbulence k-epsilon model, while specifying the inflow velocity for air, fluent asks for "turbulence kinetic energy" and "turbulence dissipation rate". Both are given the default values of 1.

Is there any formula to calculate these values. Can it be calculated from Reynold's number, properties of air etc..

Please help..
  Reply With Quote

Old   January 25, 2007, 15:36
Default Re: Turbulence kinetic energy formula
Posts: n/a
The definition can be found here

For simulations the default values are very high and often leads to convergence troubles..

You may use .1 or lesser values for both.

Instead to TKE and e, you can select the turbulent specification method as Intensity and hydraulic diameter, which are easier to estimate.

  Reply With Quote


Thread Tools
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 On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
k-e turbulence model and energy equation Blob Main CFD Forum 0 May 29, 2009 08:35
Tubulence kinetic energy Alex CFX 0 September 21, 2007 03:32
kinetic energy in k-e dispersed turbulence model? tim FLUENT 0 March 29, 2007 14:24
turbulence kinetic energy? Eric FLUENT 1 December 3, 2000 11:41
turbulence modeling questions llowen Main CFD Forum 3 September 11, 1998 04:24

All times are GMT -4. The time now is 21:05.