CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > General Forums > Main CFD Forum

[continuity ? in 2-phase]

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   July 30, 2001, 08:19
Default [continuity ? in 2-phase]
  #1
xaz
Guest
 
Posts: n/a
Hi everyone ! I always thanks for your helpful rep.

In two-phase flow, I want to use SIMPLE algorithm. When each fluids are immiscible, doesn't it need density variable in continuity eq. ?

(How can I make suitable pressure correction eq. in this case ?)

And, is there a good ref. or site for discretization scheme of convective term in void fraction transport eq. ?

  Reply With Quote

Old   July 30, 2001, 10:07
Default Re: [continuity ? in 2-phase]
  #2
Bhu
Guest
 
Posts: n/a
You can refer to

Preconditioing algorithms for the computation of multiphase mixture flows by S. Venkateswaran, J. W. Lindau, R. F. Kunz & C. L. Merkle

AIAA 2001-0279

for the governing equations. They do not use SIMPLE
  Reply With Quote

Old   July 30, 2001, 12:21
Default Re: [continuity ? in 2-phase]
  #3
NAUMAN
Guest
 
Posts: n/a
I WANT TO DISCUS SOME THING ABOUT THE "OUT OF PHASE BLOWING" AND THE USE OF CFD USE TO STUDY THIS PHENOMENA IN DETAIL

THANK YOU
  Reply With Quote

Old   July 30, 2001, 17:36
Default Re: [continuity ? in 2-phase]
  #4
NAME
Guest
 
Posts: n/a
Once you go through the derivation you will see that the variation of the cell averaged densities is taken into account by the F-Advection equation, not that it is also essential to assume the flow is incompressible.

Make sure to take the density out of the pressure correction equation if you plan on solving high density flows, other than that I believe the pressure correction equation does not change. I personally would not use the SIMPLE algorithm although but few people have been able to make it work.

Depends on what kind of accuracies you want for your interfaces between phases. IF high use VOF, levelset, etc.. IF medium use a High resolution scheme, if low then use a first order diffusive scheme

If you search this site for VOF you will find everything you need and more...
  Reply With Quote

Old   August 27, 2001, 07:47
Default Re: [continuity ? in 2-phase]
  #5
M.jangi
Guest
 
Posts: n/a
Hi my project is spray simulation so I need experiment data about droplets evaporation in duct , if you have these data please send for me . tank's
  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



All times are GMT -4. The time now is 08:03.