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

k-epsilon implementation at High Re for incompressible channel flow

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 11, 2013, 03:18
Default k-epsilon implementation at High Re for incompressible channel flow
  #1
New Member
 
Muhammad Zubair Sheikh
Join Date: Jun 2013
Posts: 2
Rep Power: 0
Zubair959 is on a distinguished road
I'm having trouble implementing K-epsilon model in my code. This is what I'm doing.

I solve (with explicit time marching) k & epsilon transport equations in internal cells and use log law relation to get friction velocity at wall adjacent cells. That value of friction velocity helps me calculate Boundary values for k and epsilon (Drichlet treatment).
Problem I'm getting is that even when my RE is 100,000, my velocity profile in channel still looks parabolic (like in laminar). I cannot understand what is the problem.

Can someone please help me? If I cant do it, it will be a big trouble for me..
Thanks all.

P.S: Turbulent quantities affect my mean momentum equation in two ways. My effective viscosity becomes laminar+turbulent viscosity and pressure becomes Pressure +(2/3)*k.
Zubair959 is offline   Reply With Quote

Reply

Tags
channel, explicit, implementation, k-epsilon, turbulence


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
[ICEM] Flow channel meshing problems StefanG ANSYS Meshing & Geometry 19 May 15, 2012 06:44
references for how to maintain a constant flow rate in turbulent channel flow amirrstg Main CFD Forum 0 October 25, 2011 03:17
Yacht in Open Channel Flow andreimour FLUENT 1 October 14, 2010 23:54
Flow within a thin channel al0Vera FLUENT 0 June 15, 2009 10:20
compressible channel flow.. R.D.Prabhu Main CFD Forum 0 July 17, 1998 17:23


All times are GMT -4. The time now is 22:53.