|December 11, 2009, 16:00||
Top boundary condition for fluidized bed
Join Date: Dec 2009
Posts: 1Rep Power: 0
I am simulating a fluidized bed reactor using cfx 11. I am using a kinetic theory of granular flow in order to simulate the behaviour of the catalys phase. Well, I managed to set-up the simulation, and run it, however I get some unnatural results, for example higher pressure on the top of my bed in comparison to my inlet, border between gas and solid oscilates before bubbles appear, and also very high gas velocity in the freeboard zone.
Somehow I have the feeling that this might have something to do with the outlet boundary condition specification.
When I specify outlet boundary condition, I constantly get the message that my both solids and gas are entering the domain, and the wall is put on the boundary.
When I however put the opening bounday condition with pressure specification, simulation runs fine, but I have to specify the concentrations on the other side of the boundary, which is effecting (diluting my reaction products ) my results, and I cant predict reactor outlet.
Does anyone have any advice?
Thanks a lot,
|Thread||Thread Starter||Forum||Replies||Last Post|
|Wind turbine simulation||Saturn||CFX||34||October 16, 2014 05:27|
|Degassing boundary condition in Fluent?||srjp||FLUENT||2||August 18, 2011 08:46|
|how to set up a wall boundary condition according to calculated wall shear stress?||gameoverli||OpenFOAM Pre-Processing||1||May 21, 2009 08:28|
|1 and 2 Order Boundary condition at the same place||CFD_Flo||Main CFD Forum||4||July 11, 2005 11:57|
|Degassing Boundary Condition ????||thomas||CFX||2||February 12, 2004 03:59|