CFD Online Logo CFD Online URL
Home > Forums > CFX

BC Profile with Turbulent Intensity

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

LinkBack Thread Tools Display Modes
Old   May 13, 2010, 03:36
Default BC Profile with Turbulent Intensity
Join Date: Feb 2010
Posts: 33
Rep Power: 9
blackbody is on a distinguished road
hi everybody!

can i use turbulent intensity (%) as a profile boundary condition?
when i look at the "standard variable names" in CFX helper i only
see that i can specify k (turbulence kinetic energy) as a profile bc parameter.
if i use k in the profile BC, than CFX ask me for epsilon (turbulent dissipation rate). i dont have epsilon though....
any suggestion?

thank you very much!
blackbody is offline   Reply With Quote

Old   May 13, 2010, 07:10
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 14,065
Rep Power: 109
ghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the rough
Turbulence intensity % just defines the turbulence intensity (k) as a function of flow velocity. It does not define the second variable required to specify the turbulence inlet condition. You will need to specify an epsilon, turbulence length scale, turbulence viscosity scale or some other independent turbulence parameter to define the second turbulence variable.
ghorrocks is offline   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
How to calculate Turbulent Intensity? prem FLUENT 8 March 21, 2012 14:40
Turbulent intensity for pressure Outlet Boundary condition Mohsin FLUENT 1 April 30, 2010 10:36
Turbulent intensity swe704 Main CFD Forum 0 November 13, 2009 04:42
setting value of turbulent intensity and turbulent viscosity ratio in wind tunnel nuimlabib Main CFD Forum 0 August 4, 2009 00:05
Turbulent Intensity good or bad for a jet Christian Main CFD Forum 0 November 19, 2003 06:47

All times are GMT -4. The time now is 05:39.