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

2D eulerian multiphase

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 4, 2013, 09:12
Default 2D eulerian multiphase
  #1
New Member
 
Join Date: Feb 2013
Posts: 11
Rep Power: 13
Marbau is on a distinguished road
Hi,
I try to simulate the injection of small water particles (diameter 5e-06 m), into a closed chamber. For that I use the eulerian-multiphase dense discrete phase model, with air as the eulerian phase.

Just to see how it works I tried to set up a 2D simulation (with gravity).
Update DPM Sources Every Flow iteration is enabled, injection type is surface.

But using my configuration it doesn't work. It looks like the particles get stuck directly at the injection, so nothing really flows. Reversing the direction of the injection-velocity had no effect. The boundary condition at the inlet is wall (I adopted this from a similar simulation. There it worked.)

1. Any idea what I do wrong?
2. I am not sure about boundary conditions for DPM. Which one should I choose? The descriptions in the manual are a bit confusing, at least for me.

Would be great if someone can help.
Marbau is offline   Reply With Quote

Old   February 5, 2013, 01:30
Default
  #2
Senior Member
 
SSL
Join Date: Oct 2012
Posts: 226
Rep Power: 14
msaeedsadeghi is on a distinguished road
Is it needed to use discrete-phase model?
Why don't you use multiphase model?
msaeedsadeghi is offline   Reply With Quote

Old   February 6, 2013, 06:49
Default
  #3
New Member
 
Join Date: Feb 2013
Posts: 11
Rep Power: 13
Marbau is on a distinguished road
We are interested in the particle deposition at the bottom of the chamber, so we started using this model. Do you think it is a problem of the DPM?

Well, I calculated the stopping length of my particles and it seems to fit to the calculated particle trajectory. But this is quite confusing, because I had a similar problem where it worked, under the same circumstances (aerosol in air, normal pressure).
Marbau is offline   Reply With Quote

Old   February 8, 2013, 10:04
Default
  #4
Senior Member
 
SSL
Join Date: Oct 2012
Posts: 226
Rep Power: 14
msaeedsadeghi is on a distinguished road
It is correct if you have used dense discrete phase model.
It is so simple. I think you made a mistake in boundary conditions. Would please send me your case file to check?
msaeedsadeghi is offline   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
mesh size in Eulerian multiphase flow - liquid/solid mixture microfin FLUENT 4 December 23, 2016 14:55
modelling solids viscosity in eulerian multiphase model derkaiser FLUENT 1 December 5, 2011 04:42
How to include wall lubrication forces in the Eulerian multiphase model xiaoyoyo FLUENT 1 January 4, 2011 17:42
the Eulerian multiphase model in CFX Hossam CFX 0 October 27, 2008 14:04
multiphase Eulerian particles Zbynek CFX 5 September 24, 2008 12:21


All times are GMT -4. The time now is 22:17.