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

Inlet B.C for epsilon in k-e model

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 14, 2002, 18:37
Default Inlet B.C for epsilon in k-e model
  #1
Abhijit Tilak
Guest
 
Posts: n/a
Hi all,

I have some doubts about inlet bc for e in k-e model, i calculate e at inlet as e=Cmu*rho*k**2/mu_t k is easily estimated from T.U. normally we do not have any idea what value will eddy viscosity take so I start off with some arbitrary guess (like mu_t=100*mu_l, mu_l = molecular viscosity, ofcourse mu_t is updated at each iteration) or if you have apriori knowledge of length scale u can calculate mu_t. My question is if i calcualte e from assumed value of mu_t obviously my e value at inlet is wrong. Should I update e_inlet after mu_t is updated? will i need to update even if i know the lenght scale. can some turbulence expert throw light on this.

Regards

Abhijit Tilak
  Reply With Quote

Reply

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
Centrifugal Pump and Turbulence Model Michiel CFX 12 January 25, 2010 04:20
Problems bout CFD model of biomass gasification, Downdraft gasifier wanglong FLUENT 2 November 26, 2009 00:27
Problem with b.c. of k-e model JASON Main CFD Forum 0 January 25, 2004 01:27
what the result is negatif pressure at inlet chong chee nan FLUENT 0 December 29, 2001 06:13
Unsteady Inlet B.C. Using UDF - Segmentation #@$! James Hart FLUENT 0 December 17, 2001 03:20


All times are GMT -4. The time now is 19:17.