k-omega turbulence model

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

 September 12, 2000, 22:57 k-omega turbulence model #1 Cyrille Douillet Guest   Posts: n/a Hi, I'm using an inhouse flow solver built using Overture for my master thesis at the university of Auckland. I'm running test cases on a flat plate using the k-omega turbulence model. I read that in the viscous sublayer, omega is proportional to 1/y^2 (where y is in the normal direction). What should the constant be? I get omega=0.0024*1/y^2, does that sound right, and what is the theoreticla value for the constant? Thanks for your help, Cyrille

 September 20, 2000, 11:58 Re: k-omega turbulence model #2 Antonio Pascau Guest   Posts: n/a Hi Cyrille, First of all, there is a good book on turbulence models in which the k-omega turbulence model is described in detail. The reference is Turbulence modeling for CFD by David Wilcox edited by DCW Industries at La caņada, California. Actually the writer was the proponent of the k-omega t.m. Secondly, if you are using the k-omega model described in this book the constant should be 2*nu/C_mu, nu being the kinematic viscosity and C_mu=0.09. With the value you gave for the constant the viscosity is 1e-4, more or less that of water, i.e., if your fluid is water is O.K., otherwise check your calculations again. Good luck. Antonio

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post Jade M Main CFD Forum 28 November 5, 2017 23:40 nedved OpenFOAM Running, Solving & CFD 2 November 30, 2014 23:43 doug OpenFOAM Running, Solving & CFD 10 October 2, 2012 06:55 philippose OpenFOAM Running, Solving & CFD 30 August 4, 2010 10:26 flga CFX 14 November 23, 2006 07:12

All times are GMT -4. The time now is 07:28.