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

interFoam and stratified flow in a pipeline

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

Like Tree1Likes
  • 1 Post By AlmostSurelyRob

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 24, 2011, 11:13
Default interFoam and stratified flow in a pipeline
  #1
Senior Member
 
Robert Sawko
Join Date: Mar 2009
Posts: 117
Rep Power: 22
AlmostSurelyRob will become famous soon enough
Dear All,

I would like to invite some comments on the ability of interFoam to simulate stratified flow in a pipeline.

My objective is to use interFoam together with cyclic boundary conditions. To validate my results I specify the flow rate and check the pressure gradient. There is a number of semi-theoretical correlations like Taitel & Dukler (1976) so I can compare with these results.

I've done mesh sensitivity studies, but in the range of values I tried there was no significant effect on pressure drop or shape of the interface.

There is however, a big change when I play with turbulence models. I have tried various models: kEpsilon, kOmega, LaunderSharmaKE, LamBremhorstKE and some very preliminary calculations with LES on a different mesh.

Convergence, interface shape, pressure drop, velocity profiles all seem to be very sensitive to these choices but to this day I haven't really got any satisfactory results. There are some "success stories" with Launder-Sharma model in the literature for channel flow.

I can give more details on the setting and results if anybody is interested. I am probably overlooking something so I would value your comments and criticism. Please, let me know if you have any thoughts or experience with similar problems.
AlmostSurelyRob is offline   Reply With Quote

Old   February 24, 2011, 19:23
Default No net flow case
  #2
Senior Member
 
Robert Sawko
Join Date: Mar 2009
Posts: 117
Rep Power: 22
AlmostSurelyRob will become famous soon enough
Sorry for putting a post again, but there is just one remarkably odd thing which I'd like to report. I've just imposed a zero mass flow rate for both phases and initialised the domain with zero velocity. With laminar model I immediately get large velocity vectors in transverse direction. All of these artefacts appear at the interface.
WesMaru likes this.
AlmostSurelyRob is offline   Reply With Quote

Reply

Tags
interfoam, stratified flow, turbulence modelling

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Stratified Two-Phase Flow metro OpenFOAM Pre-Processing 31 January 21, 2012 02:14
interFoam - stratified flow - problem with shear stress at interface AnjaMiehe OpenFOAM Running, Solving & CFD 8 June 14, 2010 07:49
Stratified Two-Phase Flow metro OpenFOAM 1 May 24, 2010 11:43
interFoam more Axi-symmetric two phase flow ? Ingenierias2003 OpenFOAM 4 May 10, 2010 15:39
Stratified flow with interFoam sabin.ceuca OpenFOAM Running, Solving & CFD 0 April 26, 2010 13:16


All times are GMT -4. The time now is 00:02.