Spiral air jet mills are widely used for grinding particles to a product size of 5-10 microns. The mill comprises a short cylindrical geometry with tangential air jets. Material is continuously fed to the mill and exits from a central opening. The grinding is done by high speed jets (larger than 100 m/s), and the mill has no moving parts. Further, the centrifugal motion in the mill results in simultaneous grinding and classification, with fine particles flowing out of the system once they become smaller than the cut size.

This work will investigate in detail, how wind-generated ocean waves arise, become rough and eventually break using theoretical and compuational (CFD) models. We also plan to collaborate with wave modelling groups in India / France towards this. 

Turbulent, dense fluid-particle flows are commonly encountered in engineering and natural process, transport of suspensions in chemical and pharmaceutical industries, bed load sediment transport, movement of sand dunes, impingement of jets on planetary surfaces. High speed fluid flows on dense beds are complex in nature because of the coupling between the fluid and solid phases. Most of the studies, reported in the literature have focused either dilute phase turbulent flows or dense phase solid system with laminar flows.