Eulerian granular flow using PBM

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

 September 7, 2011, 09:48 Eulerian granular flow using PBM #1 Member   Li Huang Join Date: Jan 2011 Posts: 30 Rep Power: 7 Dear friends, I am using Population Balance Model coupled with FLUENT mixture model to simulate the dispersion of solid particles in the wake of moving cars. The simulated volume fraction of the secondary phase looks reasonable, which extends backwards to a certain distance behind the car. But when I plot the Population Balance variables (such as Bin Fraction and Number Density), they don't go far behind the car. It seems the model has no problem in modeling the dispersion of particles as secondary phase, but when it comes to each bin of particles, the model does not give the dispersion right. Can anyone help? Thanks

 September 7, 2011, 13:23 #2 New Member   koteswari Join Date: Mar 2011 Posts: 14 Rep Power: 7 can u provide the details of intial conditions for inlet and intialisation of particle size distribution

September 7, 2011, 13:56
#3
Member

Li Huang
Join Date: Jan 2011
Posts: 30
Rep Power: 7
Quote:
 Originally Posted by mdsvjpk can u provide the details of intial conditions for inlet and intialisation of particle size distribution
I have a velocity inlet of air at a so-called INLET surface (v=-28m/s, about 10 m in front of a stationary car) and a velocity inlet of particles at tailpipe of the car (v=-10~-20 m/s). Particle size is around 80 nm to 800 nm in 6 discrete size bins. I initialized the model from INLET with 0 volume fraction of particles and 0 fraction for each bin.

 September 8, 2011, 00:18 #4 New Member   koteswari Join Date: Mar 2011 Posts: 14 Rep Power: 7 i think, u should not initialise that with zero volume fraction try with that and let me know the result

September 8, 2011, 14:06
#5
Member

Li Huang
Join Date: Jan 2011
Posts: 30
Rep Power: 7
Quote:
 Originally Posted by mdsvjpk i think, u should not initialise that with zero volume fraction try with that and let me know the result
Thanks very much for your suggestion. It works for a single component particle scenario. I initialize the model with 0 total particle volume fraction and a prescribed size distribution for bin volume fractions.
However, when I try with two components for particles as mixture, the plot of particle->species->Mole fraction of each component shows 0 for the whole domain. Even when I tried to initialize the model with small fraction of total particle phase volume fraction, I had no luck. Could you point some directions to me please?

Thanks

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post AdN FLUENT 7 October 7, 2015 23:00 kevin FLUENT 8 August 11, 2015 13:00 diaw Main CFD Forum 104 February 16, 2006 06:44 Derek Jing FLUENT 0 February 22, 2002 21:50 daninwin FLUENT 0 January 19, 2001 04:47

All times are GMT -4. The time now is 09:22.