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

komega turbulence model

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

Like Tree1Likes
  • 1 Post By romant

Reply
 
LinkBack Thread Tools Display Modes
Old   January 20, 2012, 05:19
Default komega turbulence model
  #1
Member
 
ahmed
Join Date: Sep 2011
Location: Pune-INDIA
Posts: 34
Rep Power: 5
ahmed_khatibs is on a distinguished road
hallo All,
I'm having a little trouble setting up the case in OpenFOAM 1.7 using k-omega SST turbulence model.
What are I need to define (Boundary Condition) for k-omega turbulent model in OpenFoam so as model has to compare with Ansys-Fluent (k-omega standard turbulence model).
Or
which solver I need to take in OpenFoam for compare with Ansys-Fluent (k-omega standard turbulence model).

Thank you
ahmed_khatibs is offline   Reply With Quote

Old   January 20, 2012, 06:07
Default
  #2
Senior Member
 
romant's Avatar
 
Roman Thiele
Join Date: Aug 2009
Location: Stockholm, Sweden
Posts: 360
Rep Power: 12
romant is on a distinguished road
You will have to decide if you want to run the model in low Reynolds number mode or in high Reynolds number mode. The difference is to have the first cell y+<1 or between 30 and 100. You can then use the following boundary conditions

for low Reynolds mode
Code:
k:
all walls

type fixedValue;
value 1e-10;

omega:
all walls

type omegaWallFunction;

nut:
all wall

type nutLowReWallFunction;
high Reynold number mode
Code:
k:
all walls

type kqRWallFunction;

omega:
all walls

type omegaWallFunction;

nut:
all walls

type nutkWallFunction;
in case for the nutkWallFunction, there are different nut wall functions available, which you have to chose yourself in case you have a rough wall or some special wall behavior.
fumiya likes this.
__________________
~roman
romant is offline   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
Use of k-epsilon and k-omega Models Jade M Main CFD Forum 12 June 2, 2015 13:16
Low Reynolds k-epsilon model YJZ ANSYS 1 August 20, 2010 13:57
KOmega Turbulence model from wwwopenFOAMWikinet philippose OpenFOAM Running, Solving & CFD 30 August 4, 2010 10:26
SSG Reynolds Turbulence Model Georges CFX 1 February 28, 2007 17:15
Komega turbulence model jasonb OpenFOAM Running, Solving & CFD 6 August 29, 2006 08:46


All times are GMT -4. The time now is 06:14.