Cyclone analysis

March 5, 2005, 02:15

Hi, I have taken up a cyclone design ,targetting for max. particle collection efficiency through CFD. As being a highly swirling flow,I am facing problem in convergence.Can anyone suggest the level of convergence for these type of flows? Thanking you in advance for reply

subramaniam.CR

March 5, 2005, 10:22

Hi,

how are you modeling the particles? Lagrangian tracking or Eulerian?

Are you steadying everything out with a "high eddy viscosity model" like k-eps?

The physics of many of these swirling cyclone flows is that there is and instability in the highly swirling core that causes it to wobble an become unsteady. That can be hard to model and you have to run an LES type simulation.

Bak_Flow

March 5, 2005, 02:15	Cyclone analysis	#1
subramaniam.CR Guest Posts: n/a	Hi, I have taken up a cyclone design ,targetting for max. particle collection efficiency through CFD. As being a highly swirling flow,I am facing problem in convergence.Can anyone suggest the level of convergence for these type of flows? Thanking you in advance for reply subramaniam.CR

March 5, 2005, 10:22	Re: Cyclone analysis	#2
Bak_Flow Guest Posts: n/a	Hi, how are you modeling the particles? Lagrangian tracking or Eulerian? Are you steadying everything out with a "high eddy viscosity model" like k-eps? The physics of many of these swirling cyclone flows is that there is and instability in the highly swirling core that causes it to wobble an become unsteady. That can be hard to model and you have to run an LES type simulation. Bak_Flow

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
LES post analysis	faisal_durr	Main CFD Forum	0	July 13, 2011 05:52
3D analysis of Ahmed body	Irshad22	FLUENT	0	December 17, 2009 04:33
What exactly is a sensitivity analysis?	Josh	CFX	3	August 19, 2009 09:18
Short Course: Computational Thermal Analysis	Dean S. Schrage	Main CFD Forum	11	September 27, 2000 17:46
Modelling Industrial cyclone behaviour	Günther Hasse	Main CFD Forum	3	October 12, 1999 19:34