CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > CFX

turblent multiphase flow

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   May 16, 2002, 04:20
Default turblent multiphase flow
  #1
zhu
Guest
 
Posts: n/a
Hi, all, when i learn cfx4, i have a question about the standard k-epsilon model in turblent multiphase flow, such as gas-solid flow. solid phase turbulent may be laminar, so, what's the equation about k-epsilon model of solid phase? someone know this. thanks. zhu
  Reply With Quote

Old   May 17, 2002, 07:11
Default Re: turblent multiphase flow
  #2
zhu
Guest
 
Posts: n/a
hi,all, maybe i don't explain my question clearly. when i simulate turbulent two-phase flow, one phase is tubulence ,the other is laminar. cfx manual says 'if any of the phases is laminar, the LAMINAR string turns off the turbulence model for the relevant phase'. but from my results, the code doesn't turn off the turbulence. that the command concerns with the turbulence is

>>OPTIONS

TURBULENT FLOW

>>TURBULENCE PARAMETERS

>>TURBULENCE MODEL

PHASE NAME 'PHASE1'

TURBULENCE MODEL 'K-EPSILON'

PARTICLE INDUCED TURBULENCE 'NONE'

>>TURBULENCE MODEL

PHASE NAME 'PHASE2'

TURBULENCE MODEL 'LAMINAR'

PARTICLE INDUCED TURBULENCE 'NONE'

if the code don't turn off the turbulence ,so what is k-epsilon equation, maybe i am wrong, i don't know. someone have the experience? thanks in advance zhu
  Reply With Quote

Old   May 17, 2002, 15:35
Default Re: turblent multiphase flow
  #3
cfd guy
Guest
 
Posts: n/a
Once I've read in the manual that both phases must have the same turbulence model, but I also have read this that you mentioned. Perhaps this formulation, turbulence for the continuous phase and laminar for the disperse phase, may be a numerical strategy to "turn off" the diffusive terms in the dipersed phase turbulence equations, perhaps. I don't know.
Regards, cfd guy
  Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Multiphase flow! Amer FLUENT 2 May 16, 2012 16:57
Realizable k-epsilon eqns for multiphase flow Rana FLUENT 0 December 8, 2006 14:46
Multiphase Flow mbga8ejf CFX 0 July 10, 2003 11:26
Inviscid Drag at subsonic, subcritical Mach # Axel Rohde Main CFD Forum 1 November 19, 2001 13:19
multiphase flow Shane Gillis FLUENT 10 August 28, 2000 20:12


All times are GMT -4. The time now is 02:45.