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-   -   multiphase flow, CFX or FLUENT? (http://www.cfd-online.com/Forums/main/12355-multiphase-flow-cfx-fluent.html)

luis October 4, 2006 03:00

multiphase flow, CFX or FLUENT?
 
Hi,

I am interested in modelling the flow in a tank with a mixture of water and air (with a strong concentration of air bubbles in the water). Does anybody have any experience in modelling that kind of flows with Ansys CFX or Fluent? which code is better for handling multiphase flow?

In a second stage I will probably have to model also a moving blade in the tank. Same question, does anybody know which code is better for moving meshes, Fluent or CFX?

I would kindly appreciate any suggestions.

Regards,

Luis

Joe October 4, 2006 17:23

Re: multiphase flow, CFX or FLUENT?
 
CFX has a very strong stirred multiphase reactor capability.

Have a look at their site and whitepapers.

William Blake October 5, 2006 00:30

Re: multiphase flow, CFX or FLUENT?
 
http://www.cd-adapco.com/press_room/...1/mixpert.html

luis October 5, 2006 01:10

Re: multiphase flow, CFX or FLUENT?
 
I have checked CFX web page and some technical papers, and it seems that CFX has both an Eulerian-Lagangian approach (Particle Transport Model) and an Eulerian-Eulerian approach (Algebraic Slip Model and Mixture Model) for modelling multiphase flow, as well as a kind of VOF model for free surface flows.

Correct me if I am wrong, but I guess the Eulerian-Eulerian approach is better for modelling bubbly flow with a large concentration of bubbles.

Does anybody know the difference between the Algebraic Slip Model and the Mixture Model?

Cheers,

Luis


Joe October 5, 2006 08:56

Re: multiphase flow, CFX or FLUENT?
 
Correct me if I am wrong, but I guess the Eulerian-Eulerian approach is better for modelling bubbly flow with a large concentration of bubbles.

Yup.


Joe October 5, 2006 08:59

Re: multiphase flow, CFX or FLUENT?
 
ICEMCFd also does a good job on meshing reactors: http://www-harwell.ansys.com/demoroo...ls.php?id=44,8

luis October 5, 2006 13:24

Re: multiphase flow, CFX or FLUENT?
 
Thanks for the links, that seems appropriate for my purposes.

Luis



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