|
[Sponsors] |
February 4, 2013, 08:12 |
2D eulerian multiphase
|
#1 |
New Member
Join Date: Feb 2013
Posts: 11
Rep Power: 13 |
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. |
|
February 5, 2013, 00:30 |
|
#2 |
Senior Member
SSL
Join Date: Oct 2012
Posts: 226
Rep Power: 14 |
Is it needed to use discrete-phase model?
Why don't you use multiphase model? |
|
February 6, 2013, 05:49 |
|
#3 |
New Member
Join Date: Feb 2013
Posts: 11
Rep Power: 13 |
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). |
|
February 8, 2013, 09:04 |
|
#4 |
Senior Member
SSL
Join Date: Oct 2012
Posts: 226
Rep Power: 14 |
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? |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
mesh size in Eulerian multiphase flow - liquid/solid mixture | microfin | FLUENT | 4 | December 23, 2016 13:55 |
modelling solids viscosity in eulerian multiphase model | derkaiser | FLUENT | 1 | December 5, 2011 03:42 |
How to include wall lubrication forces in the Eulerian multiphase model | xiaoyoyo | FLUENT | 1 | January 4, 2011 16:42 |
the Eulerian multiphase model in CFX | Hossam | CFX | 0 | October 27, 2008 13:04 |
multiphase Eulerian particles | Zbynek | CFX | 5 | September 24, 2008 11:21 |