|November 10, 2010, 10:30||
Eularian vs Discrete Phase Particle Tracking
Join Date: Mar 2009
Location: Long Island NY
Posts: 23Rep Power: 9
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.
|Thread||Thread Starter||Forum||Replies||Last Post|
|Urg: Particle tracks discrete phase summary sample||fivep||FLUENT||5||July 21, 2014 04:48|
|Particle Tracking for ion||Jun||CFX||2||August 31, 2010 08:19|
|Number density tracking rather than particle tracking||Rebecca||Main CFD Forum||2||April 23, 2009 12:52|
|DPM UDF particle position using the macro P_POS(p)[i]||dm2747||FLUENT||0||April 17, 2009 01:29|
|Discrete Phase Model - Particle Tracking||johnnyb||FLUENT||0||March 17, 2004 10:36|