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

How to initialize computational full of discrete particles to DPM or DDPM simulations

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 12, 2015, 04:51
Question How to initialize computational full of discrete particles to DPM or DDPM simulations
  #1
New Member
 
Daniel José de Oliveira Ferreira
Join Date: Aug 2015
Posts: 4
Rep Power: 11
chaada is on a distinguished road
Hi friends

How to initialize the case with a certain region filled with particles for DPM or DDPM simulation? I need to set up a initial patch for a determinate amount of particles in the computational domain before run the simulation.

Is there something like it is done for Euler-Euler simulations?
(where you can make initialize - patch - phase2 - volume fraction in a specif region)

thanks in advance
Daniel José
chaada is offline   Reply With Quote

Old   August 15, 2015, 07:31
Default
  #2
Member
 
Jim
Join Date: May 2015
Posts: 47
Rep Power: 11
CFDYourself is on a distinguished road
Hi Daniel,
I have a problem that is quite similar to yours in my own simulations.
you need to have an injection (or injections) in order for DPM to be present in the model.
I believe DDPM also need to have an injection.
if you want to create an injection in every cell, I have found this is possible but not straight forward. the way I'm doing it currently is using a UDF to write an injection file.

If you're in 2D i think you can also do a surface injection, and activate an tickbox that will weight every injection according to the area of the cell face.

I think Fluent has a beta function called "volume injection" in recent releases (v15/16) but I haven't explored this myself.

n.b. I don't have a lot of experience with DDPM.
CFDYourself is offline   Reply With Quote

Old   August 17, 2015, 08:52
Default
  #3
New Member
 
Daniel José de Oliveira Ferreira
Join Date: Aug 2015
Posts: 4
Rep Power: 11
chaada is on a distinguished road
Quote:
Originally Posted by CFDYourself View Post
Hi Daniel,
I have a problem that is quite similar to yours in my own simulations.
you need to have an injection (or injections) in order for DPM to be present in the model.
I believe DDPM also need to have an injection.
if you want to create an injection in every cell, I have found this is possible but not straight forward. the way I'm doing it currently is using a UDF to write an injection file.

If you're in 2D i think you can also do a surface injection, and activate an tickbox that will weight every injection according to the area of the cell face.

I think Fluent has a beta function called "volume injection" in recent releases (v15/16) but I haven't explored this myself.

n.b. I don't have a lot of experience with DDPM.

Thank you so much CFDYourself

It worked for me in a initial test. I had some problems with divergence at the beginning but I could make a simple test with a small number of particles.

There is a pdf material with a lot of beta functions not only for disperse phase modeling, but for almost all modeling tools available in Fluent. Just search in google "Fluent 15.0 beta functions manual".

Thanks Again.
chaada is offline   Reply With Quote

Reply

Tags
ddpm, euler-lagrange, initialize particles


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
Accumulation of particles inside the computational domain liliana FLUENT 0 June 2, 2014 20:10
allocating some particles to a parcel in DPM morihangi FLUENT 0 October 24, 2012 09:08
DEFIND_SOURCE with looping through DPM particles mfren FLUENT 4 November 8, 2011 03:24
DPM - do the particles affect the liquid? Nikhil Dani FLUENT 0 January 1, 2009 12:58
DPM - Why do the particles not vanish? Johannes FLUENT 12 July 6, 2007 12:19


All times are GMT -4. The time now is 00:02.