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

Particle dispersion model with LES?

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

Like Tree1Likes
  • 1 Post By matejfor

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   October 28, 2010, 20:17
Default Particle dispersion model with LES?
  #1
New Member
 
Kushagra Mittal
Join Date: Mar 2009
Posts: 15
Rep Power: 17
mittal is on a distinguished road
Hi,

Is there any dispersion model available for particle tracking with LES in Openfoam ? I found three models in openfoam:

1) StochasticDispersionRAS
2) none
3) GradientDispersionRAS

First and last option can not be used with LES and gives error as they seem to be based on RANS turbulence modeling?

Can some one please comment and guide me?

Many thanks,
Kushagra
mittal is offline   Reply With Quote

Old   October 29, 2010, 12:13
Default
  #2
Senior Member
 
matej forman
Join Date: Mar 2009
Location: Brno, Czech Republic
Posts: 182
Rep Power: 17
matejfor is on a distinguished road
Hi,
as you write the only dispersion model available for LES is none, which probably does not do what you want. The question is: Do you need a dispersion model for your LES simulation? What is the Stokes number of your particles, what is your particle time scale compared to the timescale of unresolved turbulence?

If you really need it, it should not be difficult to write your own following the RAS model as a template and some LES dispersion model from the literature.

btw. there is a dummy LES dispersion implementation in spray class of dieselSpray.

good luck

matej
Linmunn likes this.
matejfor is offline   Reply With Quote

Old   October 29, 2010, 15:50
Default
  #3
New Member
 
Kushagra Mittal
Join Date: Mar 2009
Posts: 15
Rep Power: 17
mittal is on a distinguished road
Dear Matej,
Thank you very much for your help.
I will look in to details you pointed out and get back to you.
Thanks once again,
Regards,
Kushagra
mittal is offline   Reply With Quote

Reply

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
Macroscopic particle model sbiswas12000@yahoo.com Main CFD Forum 1 October 26, 2017 03:57
Turbulent Dispersion for Coal Combustion gravis CFX 2 March 23, 2010 23:56
A model is used to model particle interaction with the geometry dungsidietquy FLUENT 0 November 4, 2009 16:05
How to create a pollution dispersion model? Diwanshu Siemens 4 September 3, 2008 11:49
LES particle dispersion Rasmus Gjesing (Gjesing) OpenFOAM Running, Solving & CFD 1 January 4, 2005 11:00


All times are GMT -4. The time now is 15:49.