|March 7, 2012, 06:23||
Diverging Eulerian Multiphase
siamak rahimi ardkapan
Join Date: Jul 2010
Location: Copenhagen, Denmark
Posts: 218Rep Power: 10
I am simulating particles in the air.
The geometry is a room and a candle inside.
When I try steady state, it shows from the beginning floating point.
When I use Unsteady with low relaxation factors, it works to some extent, but whenever I change it to steady state, again it starts to diverge.
Any advice is highly appreciated.
|March 7, 2012, 18:51||
Join Date: Oct 2009
Posts: 637Rep Power: 14
Looks like an Eulerian multiphase simulation, right?
In that case, run it laminar, it's very unstable when running it turbulent.
Another try is to reduce under-relaxation factors to very very very low numbers.
Or even better: Try both at the same time!
I understand that's not satisfying, but unfortunately the Eulerian approach is very unstable under turbulent conditions. There are too much equations affecting each other.
|January 2, 2014, 13:12||
Join Date: May 2011
Posts: 231Rep Power: 8
Did you get the solution with steady state?
I have the same problem.
can you help me!
thanks in advance
|Thread||Thread Starter||Forum||Replies||Last Post|
|porosity in packed bed with eulerian multiphase||Sree||FLUENT||1||April 15, 2015 06:17|
|mesh size in Eulerian multiphase flow - liquid/solid mixture||microfin||FLUENT||3||June 10, 2014 12:53|
|modelling solids viscosity in eulerian multiphase model||derkaiser||FLUENT||1||December 5, 2011 04:42|
|the Eulerian multiphase model in CFX||Hossam||CFX||0||October 27, 2008 14:04|
|multiphase Eulerian particles||Zbynek||CFX||5||September 24, 2008 11:21|