CFD Online URL
[Sponsors]
Home > Forums > FLUENT

weired behavior in discrete phase

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 15, 2006, 12:00
Default weired behavior in discrete phase
  #1
Arash Kashani
Guest
 
Posts: n/a
does anyone really know how discrete phase model works in fluent?

I use discrete phase model in fluent to inject a single droplet and study its breakup, nevertheless I get differenr results for child drop sizes every time I run the same case, total mass of liquid particles are conserved though. Has anybody ever experienced the same thing? I wonder if I have made any mistakes or if this is in the nature of discrete phase modeling.
  Reply With Quote

Old   August 30, 2006, 08:30
Default Re: weired behavior in discrete phase
  #2
kirankumar
Guest
 
Posts: n/a
yes i also faced similar problem, descrete phase calculation is based on your conuous phase solution.so it is naturally varie with iteration and with run also . but in many cases it is negligible if you take more particles. but in your case you are taking only one particle. hoping for your feed back kiran
  Reply With Quote

Old   August 30, 2006, 17:12
Default Re: weired behavior in discrete phase
  #3
Arash Kashani
Guest
 
Posts: n/a
well, I found the answer in the KIVA II manual. Fluent basically ,like Kiva, calculates the Sauter mean diameter D32, and then determines drop sizes randomly from a x-square distribution function. that's why we get different drop sizes per run,nevertheless it seems to be reasonable if large number of drops are injected.
  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
Discrete Phase Model vittal FLUENT 4 October 28, 2014 12:07
continuous and discrete phase coupling in fluids-HELP atmcfd Main CFD Forum 1 December 31, 2009 00:02
Discrete phase modellision through a free surface thomas Main CFD Forum 0 December 10, 2003 09:05
uncoupled discrete phase calculations AMV FLUENT 0 December 3, 2003 08:21
Discrete Phase Modeling Fred Kang FLUENT 3 October 18, 2000 11:23


All times are GMT -4. The time now is 11:40.