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

lagrangian particle simulation

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

Reply
 
LinkBack Thread Tools Display Modes
Old   February 9, 2013, 05:53
Default lagrangian particle simulation
  #1
New Member
 
Red Admiral
Join Date: Nov 2012
Posts: 6
Rep Power: 4
RedAdmiral is on a distinguished road
Hello

Currently I'm using cfd to determine the efficiency of a liquid-solid phase separator.

The software uses a lagrangian particle tracking model.

I have one main question:
  1. In the book "cfd for engineers" it's mentioned that the particles have to be much smaller then the fluid phase grid cells. Are there any guidelines in choosing the right mesh size? The particle sizes I use range from 50 m to 400 m.


And are there any other important subjects that you need to consider when using this kind of particle tracking model?




At the moment my results are quite odd, I could use tips.


Thankss
RedAdmiral is offline   Reply With Quote

Old   February 9, 2013, 13:39
Default
  #2
New Member
 
Christine Darcoux
Join Date: Jul 2011
Posts: 11
Rep Power: 6
bouloumag is on a distinguished road
Quote:
Originally Posted by RedAdmiral View Post
Hello

Currently I'm using cfd to determine the efficiency of a liquid-solid phase separator.

The software uses a lagrangian particle tracking model.

I have one main question:
  1. In the book "cfd for engineers" it's mentioned that the particles have to be much smaller then the fluid phase grid cells. Are there any guidelines in choosing the right mesh size? The particle sizes I use range from 50 m to 400 m.


And are there any other important subjects that you need to consider when using this kind of particle tracking model?




At the moment my results are quite odd, I could use tips.


Thankss
Langrangian stochastic models are used frequently in atmospheric science for plume modeling. You might want to look at what they do. A good place to start is

Rodean, Howard C., 1996: Stochastic Lagrangian Models of Turbulent Diffusion. Meteorological Monographs, 26, 184.
doi: http://dx.doi.org/10.1175/0065-9401-26.48.1

and

http://faculty.eas.ualberta.ca/jdwil..._bls_blm96.pdf

and look on google scholar who cite them.
bouloumag is offline   Reply With Quote

Old   February 9, 2013, 16:05
Default
  #3
New Member
 
Red Admiral
Join Date: Nov 2012
Posts: 6
Rep Power: 4
RedAdmiral is on a distinguished road
I will take a look at your information tomorrow
RedAdmiral 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
Eulerian and Lagrangian Particle Tracking gara1988 OpenFOAM Running, Solving & CFD 1 November 15, 2012 11:21
Particle position each timestep (during simulation) lindner OpenFOAM Programming & Development 2 September 10, 2010 03:22
restarting lagrange (particle tracking) simulation dbdias CFX 0 September 22, 2007 19:26
Pressure gradient in particle simulation Mikka Main CFD Forum 0 August 5, 2007 21:55
Pressure gradient in particle simulation Mikka Main CFD Forum 0 June 30, 2007 22:16


All times are GMT -4. The time now is 23:13.