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

Simulation of bubble plumes

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 11, 2010, 08:07
Default Simulation of bubble plumes
  #1
New Member
 
Jolyn Chuah
Join Date: Nov 2010
Posts: 5
Rep Power: 6
jolync is on a distinguished road
Hi all,

May I know if anyone has done simulation for bubble plume using OpenFOAM before? Could you kindly share the file for guidance as I'm totally new to OpenFOAM..

Questions:
How to set the boundary and initial conditions?
Which solver should we use in specific?

Thank you!
jolync is offline   Reply With Quote

Old   November 11, 2010, 08:46
Default
  #2
Member
 
Join Date: Dec 2009
Posts: 36
Rep Power: 7
FG_HSRM is on a distinguished road
Hello Jolync,
a good starting point are the user's and programmer's guide, there you will surely learn to handle your first problems.
OF includes a whole bunch of tutorials, also multiphase flow solvers; interFoam, interDyMFoam, and bubbleFoam (one of this, might be useful for you).
Rergards
fritz
FG_HSRM is offline   Reply With Quote

Old   November 11, 2010, 08:54
Default
  #3
Senior Member
 
Laurence R. McGlashan
Join Date: Mar 2009
Posts: 370
Rep Power: 14
l_r_mcglashan will become famous soon enough
Are you looking to model the dispersed phase in an Eulerian or Lagrangian way?

People have published work on gas-liquid bubble columns using OpenFOAM. Do a quick google search.
__________________
Laurence R. McGlashan :: Website
l_r_mcglashan is offline   Reply With Quote

Old   November 11, 2010, 09:15
Default
  #4
New Member
 
Jolyn Chuah
Join Date: Nov 2010
Posts: 5
Rep Power: 6
jolync is on a distinguished road
Hi Freidrich,

Yup, I've gone through the user guide. But I still don't know how to make use of the multiphase - twophaseEuler solver to get started with the simulation. Hence, the post for help.
Thank you
jolync is offline   Reply With Quote

Old   November 11, 2010, 09:20
Default
  #5
New Member
 
Jolyn Chuah
Join Date: Nov 2010
Posts: 5
Rep Power: 6
jolync is on a distinguished road
Hi Laurence,

I think its the Eulerian method. I tried looking, but haven't found materials that are really helpful. Shall look into it again.
Thanks!
jolync is offline   Reply With Quote

Old   November 11, 2010, 09:33
Default
  #6
Senior Member
 
Laurence R. McGlashan
Join Date: Mar 2009
Posts: 370
Rep Power: 14
l_r_mcglashan will become famous soon enough
Sorry, I'm not being helpful:

Selma

Silva

Those should get you rolling on the implementation side. And of course don't forget Henrik Rusche's thesis.
__________________
Laurence R. McGlashan :: Website
l_r_mcglashan is offline   Reply With Quote

Old   November 11, 2010, 09:33
Default
  #7
Member
 
Join Date: Dec 2009
Posts: 36
Rep Power: 7
FG_HSRM is on a distinguished road
I'm not used to the solver, but what exactly is your problem?
Just jump into the twoPhaseEulerFoam/ bubbleColumn directory, create the Mesh with "blockMesh" and start the solver with "twoPhaseEulerFoam".
After finishing the tutorial, keep on and change the things to your needs.
FG_HSRM is offline   Reply With Quote

Old   September 28, 2011, 09:55
Default
  #8
Senior Member
 
Aurelien Thinat
Join Date: Jul 2010
Posts: 154
Rep Power: 7
Aurelien Thinat is on a distinguished road
Hi,

I'm trying to run a case closed to the test case Bubble Plume presented in Henrik Rusche's thesis.

Different by the injection way of bubbles in the domain : I have created a source term (a volumic scalar) in the alpha equation of bubbleFoam solver. Not a big deal normally (well, it's more a guess than something serious).

It's a 2D case, the flow is considered as laminar for a start. The sides are walls (or symmetryPlane), the bottom is a wall too and the upper boundary is an inletOutlet.

So at t=0, I put alpha = 0 if z<0,14 and alpha = 1 if z>0,14. And then some bubbles are created by the source term along the left wall.

So my main problems are :
- The interface has a strange behaviour which depends on the diameters da and db.
- If db is too high, (close to 1mm), the calculation is very unstable.
- At very small db, I have a loss of "water" (continuous phase). I guess it's something like a numerical "evaporation".

Anybody already faced these problems ?

Thank you.

Last edited by Aurelien Thinat; September 28, 2011 at 10:18.
Aurelien Thinat 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
Simulation of a single bubble with a VOF-method Suzzn CFX 18 October 2, 2009 04:18
Help required for CFD simulation of Trayed Bubble Column using Fluent art705 Main CFD Forum 0 July 15, 2009 04:04
Enquiry about the flame simulation in rotary kiln hassanelattar FLUENT 0 March 25, 2009 08:41
Air Bubble simulation Raj CFX 1 October 6, 2008 22:53
phase filed simulation of a bubble qunwuhe@hotmail.com Main CFD Forum 0 June 5, 2007 22:56


All times are GMT -4. The time now is 13:16.