CFD Online Logo CFD Online URL
Home > Forums > General Forums > Main CFD Forum

problem in Phase Field method

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

LinkBack Thread Tools Search this Thread Display Modes
Old   June 9, 2007, 02:33
Default problem in Phase Field method
Posts: n/a
I used Phase Field method simulating a bubble movement. However, when I plot the streamlines, I found some of the streamlines across the interface, which means some fluid flows across the interface. However, I simulated the incompressible and immisible flow.

Does anyone can tell me the reason and how to solve it

Thanks a lot

  Reply With Quote

Old   June 9, 2007, 03:34
Default Re: problem in Phase Field method
Posts: n/a
maybe "parasitic current" is a reason,

this is problem of modeling capilarity two-phase flow with eulerian approaches, there are some treatement for VOF method, see this for a survay:

  Reply With Quote

Old   June 9, 2007, 03:47
Default Re: problem in Phase Field method
Posts: n/a
I am not sure whether it is because of Phase Field method I used. For parasitic flow, when surface tension is weak, the effect should be negligible. I decreased the surface tension, there still is across flow.
  Reply With Quote

Old   June 9, 2007, 08:02
Default Re: problem in Phase Field method
Posts: n/a
- note that phase field is not essentially release from parasitic current.

- note that surface tension is not good measure, better is working with dimensionless numbers and change them, weber, frude ... and study effects.

- also without surface tension we have some current too.
  Reply With Quote

Old   June 9, 2007, 10:32
Default Re: problem in Phase Field method
Posts: n/a
Concerning second, I increase We number by one order. It is almost the same.

Maybe I should try Level set method and check it.

  Reply With Quote

Old   June 13, 2007, 03:09
Default Re: problem in Phase Field method
Posts: n/a
Level set is good, but migration from phase-field to level set ! (so why u select phase-filed, level set was trivial choice at first)

anyhow, i think that false current should be smaller in phase-filed than VOF (because we don't have such discontinuty that is in VOF, also filtering of phase-field variable can be tested) and probably u can manage it with phase-filed, i don't knowe whose phase-field model u r used but, phase-field has several parameters that should be adjusted to give correct result, so u have good opportunity to do more with phase-field and then put it away, also it can be see as an original and interesting work.
  Reply With Quote

Old   February 16, 2011, 12:20
Duong A. Hoang
Join Date: Apr 2009
Location: Delft, Netherlands
Posts: 93
Rep Power: 16
duongquaphim is on a distinguished road
Send a message via Yahoo to duongquaphim
Hi all,

I am thinking of using Phase-field modeling in my case, a Taylor bubble moving in a channel. As far as I know, OF did not support this phase field modelling. Can you please share your experience of which solver is most similar to that method as a starting point?


duongquaphim is offline   Reply With Quote


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
a problem of incompressible two phases(water and gas) with VOF Method zhangweisnoopy Main CFD Forum 9 August 12, 2011 08:25
how 2 freeze 1 phase flow field & start lagrangian KK CFX 5 February 14, 2008 16:48
phase field or Cahn-Hilliard method dusky.he Main CFD Forum 3 February 2, 2006 16:43
Differences between VOF and phase field 2L Main CFD Forum 2 July 4, 2004 13:30
pressure field problem. michal FLUENT 1 March 18, 2004 14:45

All times are GMT -4. The time now is 02:11.