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

Population balance model for twofluid model

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 13, 2006, 10:52
Default Hello, Has anyone started t
  #1
Member
 
Pierre Le Fur
Join Date: Mar 2009
Location: UK
Posts: 60
Rep Power: 9
pierre is on a distinguished road
Hello,

Has anyone started to implement a population balance model, droplet size moments transport model in Foam?

just thought I asked, I am trying to model the break-up of a liquid jet into another liquid with a eulerian-eulerian approach.

Pierre
pierre is offline   Reply With Quote

Old   March 13, 2006, 11:12
Default hello, I will add the code of
  #2
Member
 
olivier Petit
Join Date: Mar 2009
Location: G÷teborg, Sweden
Posts: 67
Rep Power: 9
olivier is on a distinguished road
hello,
I will add the code of population balance which is already written for fluent (UDF).
The results with fluent are very good.
so when I will add it I will send it on the forum
olivier is offline   Reply With Quote

Old   March 13, 2006, 11:21
Default Cool!
  #3
Member
 
Pierre Le Fur
Join Date: Mar 2009
Location: UK
Posts: 60
Rep Power: 9
pierre is on a distinguished road
Cool!
pierre is offline   Reply With Quote

Old   January 5, 2007, 11:09
Default Hi there, I am interested a
  #4
New Member
 
joao carneiro
Join Date: Mar 2009
Posts: 3
Rep Power: 9
joao is on a distinguished road
Hi there,

I am interested at implementing the moments model with the eulerian-eulerian approach, solving phase independent tranport equations for the moments of the number size distribution of droplet diameter (for spray applications)... a huge problem in trying to implement this approach in conventional commercial codes is that the moments are actually tranported with the moment average velocities, not the phase velocity, and convective source terms are needed to work around this problem....also rho's and alfa's inside the derivatives are undesirable. Normally, the softwares do not offer this flexibility, that's why I want to try it with Foam...

Does anyone have any experience with that ???

Thanks a lot.
Joao.
joao is offline   Reply With Quote

Old   January 5, 2007, 15:13
Default Sounds like fun - indeed, you
  #5
Senior Member
 
Hrvoje Jasak
Join Date: Mar 2009
Location: London, England
Posts: 1,781
Rep Power: 22
hjasak will become famous soon enough
Sounds like fun - indeed, you can have as many independent flux fields as you like. Have you considered how you are going to make them conservative?

Hrv
__________________
Hrvoje Jasak
Providing commercial FOAM/OpenFOAM and CFD Consulting: http://wikki.co.uk
hjasak is offline   Reply With Quote

Old   January 17, 2007, 05:07
Default Thanks for the interest... Co
  #6
New Member
 
joao carneiro
Join Date: Mar 2009
Posts: 3
Rep Power: 9
joao is on a distinguished road
Thanks for the interest...
Conservative fluxes...hmmm. By conservative you mean the flux leaving a control volume must be equal to the flux entering the direct neighbour control volume ? Maybe I am missing your point here, but by defining our new independent flux as u*phi (and not rho*u*alpha*phi) and integrating over the whole control volume (and not only where, say, phase 1 is present, otherwise we would have "alpha" appearing again), as long as we don't formulate it in a non-conservative way ( d/dx(u*phi) and not u*d/dx(phi)... ) wouldn't be enough ?

Or do you think it is better to keep the idea of incorporating every change in the RHS of the equation with some convective source term (I must say I don't like it...)?

Again, thanks for your help.

Joao.
joao is offline   Reply With Quote

Old   November 26, 2012, 04:29
Default
  #7
Senior Member
 
Dongyue Li
Join Date: Jun 2012
Location: Torino, Italy
Posts: 742
Rep Power: 9
sharonyue is on a distinguished road
Quote:
Originally Posted by joao View Post
Thanks for the interest...
Conservative fluxes...hmmm. By conservative you mean the flux leaving a control volume must be equal to the flux entering the direct neighbour control volume ? Maybe I am missing your point here, but by defining our new independent flux as u*phi (and not rho*u*alpha*phi) and integrating over the whole control volume (and not only where, say, phase 1 is present, otherwise we would have "alpha" appearing again), as long as we don't formulate it in a non-conservative way ( d/dx(u*phi) and not u*d/dx(phi)... ) wouldn't be enough ?

Or do you think it is better to keep the idea of incorporating every change in the RHS of the equation with some convective source term (I must say I don't like it...)?

Again, thanks for your help.

Joao.
hello~ how is it going about the PBE in openfoam?
sharonyue is offline   Reply With Quote

Old   March 26, 2014, 03:39
Default
  #8
Senior Member
 
Dongyue Li
Join Date: Jun 2012
Location: Torino, Italy
Posts: 742
Rep Power: 9
sharonyue is on a distinguished road
Right now Im confused about the breakage process model:

Please see the image attached.
Attached Images
File Type: jpg 1.jpg (83.2 KB, 55 views)
sharonyue is offline   Reply With Quote

Old   March 15, 2016, 12:12
Default
  #9
Member
 
Muhammad Furqan Ali
Join Date: Oct 2014
Location: beijing
Posts: 35
Rep Power: 3
furqanrk is on a distinguished road
Send a message via Skype™ to furqanrk
Quote:
Originally Posted by olivier View Post
hello,
I will add the code of population balance which is already written for fluent (UDF).
The results with fluent are very good.
so when I will add it I will send it on the forum
Respected experts,

When applying Discrete*Population Balance Model in ANSYS Fluent we have to put predefine boundary conditions values. For Example,

phase.. Air.. Bins...7 Ratio Exponent...1.7 Minimum Dia...0.05cm then in boundary conditions... Velocity Inlet...Boundary Values*for setting*are..

Bin-0-fraction________ * Constant

Bin-1-fraction_________ Constant

Bin-2-fraction_________Constant

Bin-3-fraction_________Constant

Bin-4-fraction_________Constant

Bin-5-fraction_________Constant

Bin-6-fraction_________Constant

How to set these values to get appropriate gas distribution ?

How to set boundary condition values in Fluent Population Balance model ? - ResearchGate. Available from: https://www.researchgate.net/post/Ho..._Balance_model [accessed Mar 16, 2016].
furqanrk is offline   Reply With Quote

Old   March 19, 2016, 14:46
Default
  #10
Member
 
VinÝcius da Costa ┴vila
Join Date: Jul 2015
Location: Porto Alegre, Brazil
Posts: 61
Rep Power: 3
avila.vc is on a distinguished road
Hello all,

Have anyone ever tried to use PBE with Euler-Euler solver and non-Newtonian liquids? I am still trying to understand how to implement non-Newtonian behavior on twoPhaseEulerFoam. Does anyone have any thoughts?
__________________
VinÝcius dC.A.
avila.vc 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
the population balance model Hossam FLUENT 2 June 22, 2016 09:04
UDFs - Population balance model Sri FLUENT 3 July 8, 2011 07:01
Population Balance Model tacaro FLUENT 0 August 12, 2008 01:41
population balance model mustafa FLUENT 1 February 28, 2008 15:21
Population Balance Model Daniel CFX 0 September 4, 2003 19:48


All times are GMT -4. The time now is 06:23.