CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT > Fluent Multiphase

Separation of Oil Phase from Dilute Oil/Water Emulsion

Register Blogs Community New Posts Updated Threads Search

Like Tree3Likes
  • 3 Post By CeesH

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 1, 2014, 13:33
Default Separation of Oil Phase from Dilute Oil/Water Emulsion
  #1
New Member
 
Alireza Khidambashi
Join Date: Feb 2010
Location: Iran
Posts: 10
Rep Power: 16
alireza-kh is on a distinguished road
I want to simulate Separation of Oil Phase from Dilute Oil/Water Emulsion.
I don't know that which of multiphase model of fluent is suitable for my modeling.
water droplets separate from oil by gravity. In this separation the water droplets have interaction with together and small droplets change to larger droplets then new droplet that have more weight, separate from oil with gravity.
alireza-kh is offline   Reply With Quote

Old   September 5, 2014, 08:29
Default
  #2
Senior Member
 
Cees Haringa
Join Date: May 2013
Location: Delft
Posts: 607
Rep Power: 0
CeesH is on a distinguished road
Hello Alireza,

That's a rather involved simulation to do in FLUENT. It all depends on the scale of the domain you want to model. If you are looking at large scale equipment there's no way you can model the individual droplets, and you need Eulerian multiphase. Problem is that interaction is not default in there, and you need some kind of population-balance approach in order to simulate droplet merging. But this does mean that merging results from a set empirical model, rather than underlying physics.

Looking at smaller scales, volume of fluid (VOF) may be the way to go but the method is not particularly good at predicting coalescent behavior if I recall correctly. When you are looking at small scales (several droplets) it would be better to look outside of FLUENT, for example into phase-field methods. Those simulations use chemical potential rather than concentration as a driving force, hence phase separation can be captured quite nicely with it. If I'm correct, there are some OpenFOAM modifications that can handle phase-field.
alireza-kh, aee and BlnPhoenix like this.
CeesH is offline   Reply With Quote

Old   September 8, 2014, 07:32
Default
  #3
New Member
 
Alireza Khidambashi
Join Date: Feb 2010
Location: Iran
Posts: 10
Rep Power: 16
alireza-kh is on a distinguished road
Hello Ceesh
Thanks for your attention and guidance.
Your post is very helpful for me and now I can solve my problem with a new method. I have not any studied about phase-field methods.
alireza-kh is offline   Reply With Quote

Old   November 9, 2019, 23:32
Default
  #4
New Member
 
sam
Join Date: Dec 2018
Posts: 13
Rep Power: 7
camad93 is on a distinguished road
Quote:
Originally Posted by alireza-kh View Post
Hello Ceesh
Thanks for your attention and guidance.
Your post is very helpful for me and now I can solve my problem with a new method. I have not any studied about phase-field methods.
Hi alireza,
What method do you used to simulate the droplet particles/emulsion? Are you using Eulerian method or just VOF? Thanks in advanced!
camad93 is offline   Reply With Quote

Reply


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
alphaEqn.H in twoPhaseEulerFoam cheng1988sjtu OpenFOAM Bugs 15 May 1, 2016 17:12
Problem with phase separation in t-junction estenmark FLUENT 2 June 3, 2014 21:18
Algorithms for single phase flow equation of oil reservoir fluid aadi.engr Main CFD Forum 0 April 2, 2014 17:01
Oil water separation Eric1 CFX 1 September 1, 2010 16:07
compressible two phase flow in CFX4.4 youngan CFX 0 July 2, 2003 00:32


All times are GMT -4. The time now is 18:24.