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

phase inversion

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 11, 2005, 22:56
Default phase inversion
  #1
Rashmi
Guest
 
Posts: n/a
hi all

iam trying to simulate phase inversion in horizontal pipe(two phase L-L flow)..using fluent how can i know where exactly the phase inversion is occuring?

any body has any idea regarding this? i thought if i have the experimental values of the pressure and i know at what length of the pipe the phase inversion is occuring then i can create a plane at that point and monitor the pressure...but how do i get the other pressure values to plot the graph.

can anyone help me out thanks Rashmi
  Reply With Quote

Old   December 12, 2005, 10:29
Default Re: phase inversion
  #2
kp@dal.ca
Guest
 
Posts: n/a
Eulerian approach cannot handle phase inversion. And PBE implementation in FLUENT does not support VOF. That is the reason why I told you ealier you have to focus on bubbly flows only. And it is very hard to find papers in horizontal pipes that to for liquid-liquid in bubbly regime. In G-L there are a few such as those by Iskandrani et al. (1999). KP
  Reply With Quote

Old   December 12, 2005, 10:36
Default Re: Follow up of phase inversion
  #3
kp@dal.ca
Guest
 
Posts: n/a
On top of it you cannot use 2D to solve horizontal pipes. U have to use 3D to get good and correct results. KP
  Reply With Quote

Old   December 12, 2005, 19:59
Default Follow up of phase inversion
  #4
Rashmi
Guest
 
Posts: n/a
iam using 3d but how do i proceed for simulating phase inversion.which model i have to use if go for bubbly flow.

Rashmi
  Reply With Quote

Old   December 13, 2005, 03:37
Default Follow up of phase inversion
  #5
Rashmi
Guest
 
Posts: n/a
hi KP

is there any udf where i can increase the vol fraction of oil after x iterations keeping the velocity of oil and water constant to get the phase inversion. at phase inversion point the effective viscosity of the mixture is greater then the mixture viscosity.so i write a udf for this will it work??

Rashmi
  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
alphaEqn.H in twoPhaseEulerFoam cheng1988sjtu OpenFOAM Bugs 14 September 18, 2011 13:46
two Phase column simulation chemeng OpenFOAM 3 August 18, 2010 12:53
Source Term used in Eulerian Model(Two phase) Padian FLUENT 1 May 19, 2008 03:47
can cfx handle phase inversion and drop size Rashmi CFX 0 December 14, 2005 05:21
compressible two phase flow in CFX4.4 youngan CFX 0 July 1, 2003 23:32


All times are GMT -4. The time now is 11:12.