CFD Online Logo CFD Online URL
Home > Forums > General Forums > Main CFD Forum

continuity equation for the mixture

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

LinkBack Thread Tools Display Modes
Old   May 2, 2003, 03:59
Default continuity equation for the mixture
Posts: n/a

I posted this message some time ago on fluent forum but ive got no responce. So ill try my luck here...

Im dealind with cavitation problem with so called mixture model. Its very simmilar to VOf model. Anyway the problem is with continuity equation with the mixture.

d/dt(rho_m)+nabla(rho_m*v_m)=mass transfer

Its equation 20.3.1 in fluent manual. index m means mixture (all the parameters of each phase - like velocity and density are averaged to a single mixture phase).The question is how can there be mass transfer between phases inluded in this equation if its averaged for the mixture????

The other equation is volume fraction equation for secondary phase (20.3.15) To get the void fraction of each phase in a cell fluent solves this equation:


where alpha_k is the volume fraction of k-th phase. - shouldnt mass transfer be included here????

please help

regards MATEUS

  Reply With Quote


Thread Tools
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 On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
How to write k and epsilon before the abnormal end xiuying OpenFOAM Running, Solving & CFD 8 August 27, 2013 15:33
Upgraded from Karmic Koala 9.10 to Lucid Lynx10.04.3 bookie56 OpenFOAM Installation 8 August 13, 2011 04:03
mixture mass continuity v.s. volumetric mixture continuity in pressure equation kaifu OpenFOAM 0 June 9, 2011 08:14
IcoFoam parallel woes msrinath80 OpenFOAM Running, Solving & CFD 9 July 22, 2007 02:58
Could anybody help me see this error and give help liugx212 OpenFOAM Running, Solving & CFD 3 January 4, 2006 19:07

All times are GMT -4. The time now is 13:20.