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apaojo-5 February 23, 2012 08:27

Study advise for multiphase flow?
 
Hey all,

I'm currently working with a general multiphase problem where air is entrained in water and I feel that I lack some fundamental understanding in general multiphase issues. I have been checking out the book by Drew & Passman Theory of Multicomponent Fluids, have anyone on the forum used or heard of this book and can recommend it to me? Other book recommendations or perhaps even better courses in multiphase flow fundamentals is highly appreciated!

Kind regards,

Patrick

rmh26 February 23, 2012 22:46

I've done some work in this area, if you could be a little more specific about what your trying to do i could point you in the right direction.

Is this a bubbly flow, or a wave breaking, or fluidized bed etc.

apaojo-5 February 24, 2012 04:51

Thanks for a fast reply!

I'm working with hydraulic jumps so I would say its both a bubbly flow problem as well as a free-surface flow problem, make sense? However, at this stage I'm more interested in general liquid-gas (bubbly flow) multiphase flow fundamentals such as level of coupling between equations in numerical methods (FEM/FVM) and ESPECIALLY the physical aspects of the interaction between phases.

/ Patrick

rmh26 March 3, 2012 12:46

This software(GERRIS) is open source. It will solve the navier stokes equations in for two phase flows with an accurate(ish) model for the surface tension. Accurate models of surface tension flows are still an active topic of research.
The software does adaptive meshing to so I would say its pretty good stuff.

http://gfs.sourceforge.net/wiki/index.php/Main_Page

GERRIS used for hydraulic jumps
http://gerris.dalembert.upmc.fr/gerr.../GUM/tomar.pdf

While I have never actually used this software I have read a lot about it and used some of their ideas on my own project.

As for the method itself, it is a VOF code with a balanced force algorithm for the surface tension. VOF has been around or 30 or so years and come in many varieties but they all do basically the same thing.

As for the interfacial physics I think the or second chapter of Gary Leals book does an ok job explaining the boundary conditions.

I have seen some FEM multiphase work but I would say the bulk of the research and papers use a finite volume/ finite difference technique.

The surface tension presents more of a challenge and I don't think personally there are any good methods for treating it but some that are passable especially with a proper adaptive mesh.


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