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

how to specify the inlet turbulence kinetic energy

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   December 3, 2005, 05:26
Default how to specify the inlet turbulence kinetic energy
  #1
rajesh
Guest
 
Posts: n/a
Can any body please help me how to specify inlet boundary condition for turbulent flow. Because it is asking for parameters like turblence reference velocity, % mean velocity, % hydraulic diameter, turbulence kinetic energy, turbulence dissipation rate.

  Reply With Quote

Old   December 3, 2005, 07:00
Default Re: how to specify the inlet turbulence kinetic en
  #2
Rashmi
Guest
 
Posts: n/a
hi can u tell me what u r modeling so that i can answer ur question

Rashmi
  Reply With Quote

Old   December 3, 2005, 07:16
Default Re: how to specify the inlet turbulence kinetic en
  #3
rajesh
Guest
 
Posts: n/a
i am trying to model water cooling jacket of a diesel engine, for that i need inlet specifications. i know the mean mass flow rate and pressure. thank you
  Reply With Quote

Old   December 3, 2005, 19:52
Default Re: how to specify the inlet turbulence kinetic en
  #4
Halim
Guest
 
Posts: n/a
The followings are what the CFX code is doing;

TEin=1.5*(0.037*Vin)**2,

EDin=TEin**1.5/(0.3*D)

where TEin is the turbulent kinetic energy at inlet, EDin is its dissipation rate at inlet, Vin is the inlet velocity and D is the inlet length scale such as the hydraulic diameter. The value 0.037 (3.7%) is the turbulence intensity and you can change it. I hope this helps.

Good luck,

Halim
  Reply With Quote

Old   July 29, 2015, 08:27
Default
  #5
New Member
 
Siddhant Jain
Join Date: Jul 2015
Posts: 1
Rep Power: 0
jainsiddhant19@gmail.com is on a distinguished road
Can u please tell me the source of above info
jainsiddhant19@gmail.com 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
LES and total turbulent kinetic energy Boerge FLUENT 1 September 8, 2012 12:41
LES of periodic pipe centerline turbulent kinetic energy smehdi609 OpenFOAM 0 December 1, 2010 00:59
Turbulence kinetic energy transfer Jun FLUENT 0 April 12, 2006 00:52
turbulence kinetic energy profile chouer Main CFD Forum 0 October 27, 2005 23:02
turbulence modeling questions llowen Main CFD Forum 3 September 11, 1998 05:24


All times are GMT -4. The time now is 09:40.