CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Two-phase flow in T-junction, multiphase of DPM?

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

LinkBack Thread Tools Display Modes
Old   July 7, 2008, 01:57
Default Two-phase flow in T-junction, multiphase of DPM?
Posts: n/a
according to open literature, there should be a phase split phenomena when the two-phase flow is introduced into a T-junction. In most cases, the air phase is more likely to enter the side arm due to the existence of a thin water film on the T-junction wall, and it is just the mass ratio of air and water entering the side arm are of interest to me.

1.My problem considerd is wate/air two phase flow in T-junction

2.the flow pattern is annular.

i used multiphase(mixture and eulerian) first, but there is none liquid film, and it seems that the phase donot separate at all. (velocity inlet, outflow, outflow)

then i turn to DPM, and i turn on the "water-film" option in the wall BC, after calculation, there is still no water film, and the splitting ratio does not seem to be good

where is the problem? Is there anyone have ever performed such a research like mine? can you help me?

Many mang thanks
  Reply With Quote

Old   July 7, 2008, 20:41
Default Re: Two-phase flow in T-junction, multiphase of DP
Posts: n/a
In your problem is there a distinct interface between the water and air at the inlet? ie. the phases are not mixed at the inlet.

If this is the case you should use the VOF model.
  Reply With Quote

Old   July 8, 2008, 01:26
Default Re: Two-phase flow in T-junction, multiphase of DP
Posts: n/a
to:CDE first, i would like to express my appreciate for your answer.

In my problem, there is not a distinct phase interface, cause that the air and water are premixed, and it is injected in to the domain in a atomize way. I assume that the averaged diameter of the liquid is about 5um, so vof model could not be used

  Reply With Quote


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
Multiphase flow and Phase change due to heat transferevaporation haghajani OpenFOAM Running, Solving & CFD 87 July 30, 2017 09:02
about two phase flow in a T-junction alpha Main CFD Forum 1 March 31, 2005 07:35
multiphase or discrete phase? Louis FLUENT 1 March 10, 2004 04:49
Multiphase (3) phase simulation Eldoret CFX 1 October 9, 2003 07:30
Flow through a open channel junction Jose Alfredo C Santos Main CFD Forum 1 April 3, 2002 15:24

All times are GMT -4. The time now is 13:45.