# Turbulence closures

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

 September 4, 2003, 12:29 Turbulence closures #1 John Guest   Posts: n/a Hi, Could anyone please explain briefly what are single-point and two-point turbulence closures and their differences? Why they are called so? Which category includes major two-equation turbulence models (k-e, k-omega)? Thanks

 September 5, 2003, 04:05 Re: Turbulence closures #2 sylvain Guest   Posts: n/a Let NS(u(x1,t1)) be the Navier Stokes equation relatives to the fluctuating velocity at spatial cordinat x1 and time t1 and and let [.] be the Reynolds Averaging operator. [u_i(x2,t2)*NS(u_j(x1,t1))]+[u_j(x1,t1)*NS(u_j(x2,t2))] is the two points two times double correlation equations - see D.I.A. (Kraichnan) Making t2=t1 gives two points double correlation equations - see E.D.Q.N.M. (Orszag) Making x2=x1 gives one points double correlation equations - see R.S.M. Makinge i=j (and sum over i) gives k equation - see k-eps models

 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 Eric FLUENT 1 March 7, 2012 05:30 Mohsin FLUENT 0 September 19, 2011 21:05 Wen Long Main CFD Forum 3 May 15, 2009 09:52 John Main CFD Forum 1 August 19, 2004 06:50

All times are GMT -4. The time now is 15:37.