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

Does interFoam consider the inter-phase momentum transfer?

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

Like Tree5Likes
  • 3 Post By kwardle
  • 2 Post By ziad

Reply
 
LinkBack Thread Tools Display Modes
Old   January 9, 2013, 23:06
Default Does interFoam consider the inter-phase momentum transfer?
  #1
Member
 
Jianye Xia
Join Date: Mar 2009
Posts: 32
Rep Power: 8
bioexplore is on a distinguished road
Hi,

Can anybody tell me does the interphase drag force considered in interFoam? And what the difference between bubbleFoam and interFoam?

Thanks!

Jianye
bioexplore is offline   Reply With Quote

Old   January 10, 2013, 06:17
Default
  #2
Member
 
Andrea
Join Date: Feb 2012
Location: Leeds, UK
Posts: 79
Rep Power: 6
Andrea1984 is on a distinguished road
Hi Jianye,

you can find the interFoam formulation in the Henrik Rusche's Ph.D. thesis.

Andrea
Andrea1984 is offline   Reply With Quote

Old   January 10, 2013, 15:53
Default
  #3
Senior Member
 
Kent Wardle
Join Date: Mar 2009
Location: Illinois, USA
Posts: 195
Rep Power: 10
kwardle is on a distinguished road
No. There is one velocity field shared by all phases in interFoam and it's derviatives (multiphaseInterFoam). bubbleFoam (and twoPhaseEulerFoam) uses Euler-Euler so each phase has it's own velocity field and inter-phase momentum transfer is supplied via drag formulations. A newer solver, multiphaseEulerFoam, is unique in that it does Euler-Euler for an arbitrary number of phases (with inter-phase drag), but it can also impose a sharp interface a la interFoam on any phase pairs. Hope this is useful info.
ziad, bioexplore and Andrea1984 like this.
kwardle is offline   Reply With Quote

Old   January 10, 2013, 22:14
Default
  #4
Member
 
Jianye Xia
Join Date: Mar 2009
Posts: 32
Rep Power: 8
bioexplore is on a distinguished road
Thanks Andrea!

Quote:
Originally Posted by Andrea1984 View Post
Hi Jianye,

you can find the interFoam formulation in the Henrik Rusche's Ph.D. thesis.

Andrea
But I think Henrik Rusche's Ph.D thesis dealing with bubbleFoam but not interFoam. Is this right? Can anyone know this give some explaination?
bioexplore is offline   Reply With Quote

Old   January 10, 2013, 22:21
Default
  #5
Member
 
Jianye Xia
Join Date: Mar 2009
Posts: 32
Rep Power: 8
bioexplore is on a distinguished road
Thanks Kwardle!

Quote:
Originally Posted by kwardle View Post
No. There is one velocity field shared by all phases in interFoam and it's derviatives (multiphaseInterFoam). bubbleFoam (and twoPhaseEulerFoam) uses Euler-Euler so each phase has it's own velocity field and inter-phase momentum transfer is supplied via drag formulations. A newer solver, multiphaseEulerFoam, is unique in that it does Euler-Euler for an arbitrary number of phases (with inter-phase drag), but it can also impose a sharp interface a la interFoam on any phase pairs. Hope this is useful info.
You make it more clear!

What's my understanding is that (If I was wrong, please correct it!):
Because there is one share velocity field in interFoam, so there is no interphase momentum item derived in the UEqn, and the interface between liquid and gas is davanced by solving the alpha equation?
For bubbleFoam, the derived UEqns for each phase have the interphase momentum item, so when solving each phase's UEqn the interphase momentum item should also be given?

Is this correct?
bioexplore is offline   Reply With Quote

Old   January 13, 2013, 17:10
Default
  #6
Senior Member
 
Ziad Boutanios
Join Date: Mar 2009
Location: Montréal, Canada
Posts: 113
Rep Power: 8
ziad is on a distinguished road
interFoam is a Volume of Fluid solver so it solves one set of mixture Navier-Stokes equations with a volume fraction scalar transport equation that determines which phase you're dealing with. It does not account for interphase momentum transport because it is simply not part of the VOF mixture formulation.

It is described in Onno Ubink's PhD thesis, and definitely not Henrik Rusche's, as pointed out by kwardle. Check out equations 2.14 and 2.15 in Onno's thesis which can be found there http://powerlab.fsb.hr/ped/kturbo/Op...oUbbinkPhD.pdf

In bubbleFoam (and twoPhaseEulerFoam) you solve a full set of NS equations for each phase and couple them with the momentum coupling term which includes drag, lift and virtual mass. Turbulence is done with k-epsilon on the mixture.
bioexplore and vbnhfylbh like this.
ziad is offline   Reply With Quote

Old   January 13, 2013, 20:48
Default
  #7
Member
 
Jianye Xia
Join Date: Mar 2009
Posts: 32
Rep Power: 8
bioexplore is on a distinguished road
Hi, Ziad, Thanks very much for your clearly explaination, It makes me more clear about the difference between interFoam and bubbleFoam.
bioexplore is offline   Reply With Quote

Old   January 13, 2013, 20:51
Default
  #8
Senior Member
 
Ziad Boutanios
Join Date: Mar 2009
Location: Montréal, Canada
Posts: 113
Rep Power: 8
ziad is on a distinguished road
You're quite welcome.
ziad is offline   Reply With Quote

Old   January 28, 2013, 22:44
Default
  #9
Senior Member
 
santiagomarquezd's Avatar
 
Santiago Marquez Damian
Join Date: Aug 2009
Location: Santa Fe, Santa Fe, Argentina
Posts: 418
Rep Power: 14
santiagomarquezd will become famous soon enough
Some clarifications,

1. Henrik Rusche's thesis deals both with VOF and Euler-Euler
2. VOF can be derived from Euler-Euler via the Mixture Model, giving which I call the Weller-VOF method, this explains why interFoam retains the relative velocity term in the alpha Eqn. and the necessity to go from volumetric flux formulation to mass flux formulation assembling the rhoPhi field. This is a key concept to understand the interFoam code.
3. As the guys told, the velocity is treated as a only one field in the momentum equations so that the interphase momentum exchange term vanishes (its expresion is \propto V_{pq}\otimes V_{pq}, where V_{pq} is the relative velocity between phases p and q).

I give a full explanation of these issues in my PhD thesis which is in review, it will be available for the community by the end of March, 2013.

Regards.
__________________
Santiago MÁRQUEZ DAMIÁN, Ph.D.
Post-doctoral Fellow
Research Center for Computational Mechanics (CIMEC) - CONICET/FICH-UNL
T.E.: 54-342-4511594 Ext. 1005
Güemes 3450 - (3000) Santa Fe
Santa Fe - Argentina
http://www.cimec.org.ar
santiagomarquezd 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
Implementation of the phase momentum equation in BubbleFoam Anne Severt OpenFOAM 1 November 27, 2013 05:15
An error has occurred in cfx5solve: volo87 CFX 5 June 14, 2013 17:44
Derivation of Momentum Equation in Integral Form Demonwolf Main CFD Forum 2 October 29, 2009 20:53
Conservation equations, momentum transfer forces Luke F Main CFD Forum 1 April 25, 2008 16:49
Which Code is Best for Two Phase, Heat Transfer earlc Main CFD Forum 0 September 23, 2005 20:26


All times are GMT -4. The time now is 04:15.