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

CFX has a very strong stirred multiphase reactor capability.

Have a look at their site and whitepapers.

http://www.cd-adapco.com/press_room/...1/mixpert.html

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

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.

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

Thanks for the links, that seems appropriate for my purposes.

Luis