The man-made and natural world around us abounds in jets and water droplets. Their interactions with each other and with the surfaces with which they collide, can produce a very wide range of outcomes some of which can be visually very captivating. We seek a deeper understanding of how are droplets generated, dynamics of mutual impact of droplets and coalescence, the different modes of spreading on rigid and flexible surfaces, the dynamics of jet impact on rigid surfaces and the various hydrodynamic instabilities which arise as a part of these processes. This understanding is technologically very relevant - many manufacturing processes deal with droplets and jet impact and associated heat transfer. An improved understanding leads to an improvement in the efficiency and design of such processes. We are currently developing the necessary computational and experimental tools for studying this broad class of problems.
We have a long-term interest in waves on interfaces, their stability and associated mass transport. One of the first problems under experimental study is wave formation on a flow down an inclined plane. This effort will soon be extended to computations and theory.
In collaboration with colleagues at TIFR Centre for Interdisciplinary Sciences, Hyderabad (TCIS), we are conducting atomistic simulations of amorphous materials which sheds light into their plastic deformation. This is part of our ongoing work on understanding plasticity, shearbanding and fracture in amorphous solids.