CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

DPM particle size distribution in Fluent

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   July 1, 2008, 16:51
Default DPM particle size distribution in Fluent
  #1
Pete
Guest
 
Posts: n/a
Can anyone help, I am using Fluent 6.3 to model particle flow in a duct, I have a distribution and have fitted it to a curve using the Rosin-Rammler function in Fluent, I run the model and then check the distribution at the outlet using the sample histogram. But all it shows is an even distribution and not the specified distribution. Are there any thoughts on this please, might I have missed something in the set-up.
  Reply With Quote

Old   July 1, 2008, 17:54
Default Re: DPM particle size distribution in Fluent
  #2
lakjfd
Guest
 
Posts: n/a
this may sound like a dumb question, but have you specified the inputs in the injection setup panel for the rosin-rammler distribution (min max mean spread)?
  Reply With Quote

Old   July 1, 2008, 18:08
Default Re: DPM particle size distribution in Fluent
  #3
Remus
Guest
 
Posts: n/a
If all you get is an uniform distribution what is the (uniform) diameter at the outlet? Is is the default Fluent value or something else?

Remus
  Reply With Quote

Old   July 1, 2008, 18:13
Default Re: DPM particle size distribution in Fluent
  #4
Pete
Guest
 
Posts: n/a
I have put in all the distribution data i.e. min,max,mean and spread, as far as I can see everything is fine.
  Reply With Quote

Old   July 1, 2008, 18:17
Default Re: DPM particle size distribution in Fluent
  #5
Pete
Guest
 
Posts: n/a
Instead of having variable percentages of each diameter I get for example if I specified 100 different diameters I get 1% of the total number of particle for each diameter between the specified range.
  Reply With Quote

Old   July 7, 2008, 13:22
Default Re: DPM particle size distribution in Fluent
  #6
Allan Walsh
Guest
 
Posts: n/a
In Fluent for R-R, you will get an evenly spaced distribution for particle diameters but each particle will represent a different mass fraction of the particle distribution. It is consistent, but not necessarily the best treatment. Check previous entries in this forum for more discussion.
  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
particle size distribution Felix CFX 0 May 29, 2006 05:16
how to make particle size distribution adma CFX 0 January 10, 2006 16:57
Particle Size Distribution with R-R fails? HP FLUENT 6 May 19, 2005 07:35
particle size distribution Bob FLUENT 6 January 29, 2004 20:32


All times are GMT -4. The time now is 20:48.