CFD Online URL
[Sponsors]
Home > Forums > Main CFD Forum

Momentum interpolation for explicit schemes

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 19, 2002, 12:07
Default Momentum interpolation for explicit schemes
  #1
Yogen
Guest
 
Posts: n/a
I am trying the solve the N-S incompressible equations with a pressure based method on a collocate grid with explicit time stepping. Can you tell me how to implement the Rhie Chow momentum interpolation for an explicit scheme?
  Reply With Quote

Old   December 19, 2002, 13:50
Default Re: Momentum interpolation for explicit schemes
  #2
Jim Park
Guest
 
Posts: n/a
I can't help with your basic question of implementing an explicit Rhie Chow scheme.

But I think that you meant 'colocated', not 'collocated'. 'Collocation' is (I think) a superposition solution technique.
  Reply With Quote

Old   December 19, 2002, 17:02
Default Re: Momentum interpolation for explicit schemes
  #3
frederic Felten
Guest
 
Posts: n/a
Hi there,

The Rhie and Chow momentum interpolation is just a way of coupling the cell-center velocities (that do not conserve mass) with the pressure field. If you combine this approach with the fractional step method (explicit or semi-implicit), it has been shown to work very effectively. Anyway, the details of the implementation require some mathematical details that are well presented in the following paper: Morinishi, Lund, Vasilyev and Moin, Journal of Computational Physics, Vol 143, pp 90-124, 1998.( available online at: http://aero.uta.edu/~lund/ )

Now there are some deeper issues with the kinetic energy conservation associated with the interpolation operation itself and for this, take a look at the following paper:

Felten and Lund, Proceeding of 3rd AFOSR Int. Conf. DNS/LES, Arlington, Texas, Aug. 5-9 2001. (Available online at: http://aero.uta.edu/~felten/resume/resum.html )

This last paper has been reworked and enhanced since, and is about to be submitted to the J. Comp. Phys. A preprint will soon be available for download at the same address.

Sincerely,

Frederic Felten.
  Reply With Quote

Old   December 20, 2002, 11:43
Default Re: Momentum interpolation for explicit schemes
  #4
Yogen
Guest
 
Posts: n/a
Thanks for your help. I shall look into these papers.
  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
Surface interpolation schemes and parallelization jutta OpenFOAM Running, Solving & CFD 0 February 25, 2010 15:32
momentum interpolation for collocated grid Hadian Main CFD Forum 4 December 25, 2009 08:25
Momentum Interpolation on Collocated grids Naresh Main CFD Forum 3 November 17, 2009 09:30
Derivation of Momentum Equation in Integral Form Demonwolf Main CFD Forum 2 October 29, 2009 21:53
Question About solvers and interpolation schemes titio OpenFOAM Running, Solving & CFD 0 July 9, 2009 12:41


All times are GMT -4. The time now is 01:23.