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

Eularian vs Discrete Phase Particle Tracking

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   November 10, 2010, 10:30
Default Eularian vs Discrete Phase Particle Tracking
  #1
Member
 
Andy Robertson
Join Date: Mar 2009
Location: Long Island NY
Posts: 46
Rep Power: 17
AndyR is on a distinguished road
Folks,
I have been at this long enough that my predisposition is to use a discrete phase model (DPM / particle tracking) approach when modeling fuel sprays. However, CFD++ has presented several analyses where the fuel spray is modeled using a eularian mulitphase treatment. Fluent now has a population density model and other tools in their eularian multiphase treatment which allow the second phase to have a detailed size distribution which can change based on the same sort of modeling rules that are applied to DPM particle tracks.

Ultimately both approaches must fall back to various statistical methodologies as neither can explicitly track all the particles which might be generated within a fuel spray.

I have certainly experienced difficulties with DPM modeling where the flow physics require a very fine grid near the injection point to capture boundary layer and shock interaction (scramjets for instance), and then this fine grid results in high droplet volume fractions and DPM source terms get large and the continuum solver becomes unhappy.

So I was hoping for some general discussion of experiences with the eularian approach to fuel injeciton modeling. And would really like to hear if someone has actually directly compared the two approaches on the same problem.

Any feedback is appreciated.

Thanks
-Andy R
AndyR 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
Urg: Particle tracks discrete phase summary sample fivep FLUENT 5 July 21, 2014 05:48
Particle Tracking for ion Jun CFX 2 August 31, 2010 09:19
Number density tracking rather than particle tracking Rebecca Main CFD Forum 2 April 23, 2009 13:52
DPM UDF particle position using the macro P_POS(p)[i] dm2747 FLUENT 0 April 17, 2009 02:29
Discrete Phase Model - Particle Tracking johnnyb FLUENT 0 March 17, 2004 10:36


All times are GMT -4. The time now is 15:11.