Non-Newtonian Hele-Shaw Flow and viscous instabilities in aqueous foams.

Flow of Non-Newtonian fluids have recently recieved increased attention due to their growing importance in industry. Unfortunately, one of the important impediment to their extensive applications is their poorly understood rheological properties. I am presently studying viscous instabilities generated in a flowing foams using the Cellular Potts Model.
Our simulations based on the Cellular Potts model have already reproduced recent experimental results related to viscous instabilities of a large bubble flowing in a monodisperse foam through a Hele Shaw cell. This study is being
extended to study pattern formation in aqueous foam flowing in the H-S cell. Below are some animations of foam flowing
through the Hele Shaw cell.

A Single Large bubble moving through the foam.



Links to foam pages.

1) The foam book.
2) Foam Physics in Dublin.
3) Foam Rheology.
4) Experiments on Monolayer foams and bubble rafts.
5) Giant Soap film.


Recent publications.

Sanyal S., Glazier J. A. Viscous instabilities in flowing foams: A Cellular Potts Model Approach. Journal of Stat. Mech. P10008 (2006).