|February 12, 2003, 19:40||
Mixing By Natural Convection Processes
I'm looking at a process involving surface reactions (combustion/gasification) on walls in large reactors. The mixing and fluid flow in the reactor may be governed by natural convection which is most likely time-periodic.
Unfortunately, I don't think I can simulate the transient behaviour due to computational limitations - its 3D, >10m size^3 and I have a minimum of 7 species and the residence time in the reactor is large.
In order to approximate this situation I've been looking at using a steady state model, and modifying diffusion parameters to "appproximate" the mixing effect of the natural convection.
Has anybody tried this? How did you go about it? Was it successful etc???
I imagine that in the limit of very high diffusion I'll get a CSTR type model from the CFD, while with the standard steady model I'll get a lot less mixing. Probably the natural convection mixing and mass transport - if I could simulate it - would lie between these two extremes. So I thought I'd look at the extremes and see what I get.
Anybody got any ideas, suggestions or inisghts which might be helpful?
|Thread||Thread Starter||Forum||Replies||Last Post|
|natural convection problem with radiation||jorien||CFX||0||October 14, 2011 09:26|
|Coupled vs Seg - Natural vs. Forced Convection||Alex||CD-adapco||5||December 12, 2007 05:58|
|Approximate Mixing due to Natural Convection||Greg Perkins||Main CFD Forum||0||February 12, 2003 19:43|
|Heat of mixing - natural convection||Andre||Main CFD Forum||0||May 10, 2000 05:42|
|Heat of mixing - natural convection||Andre||FLUENT||0||May 10, 2000 05:40|