My interests encompass phenomena in applied polymer physics, fluid mechanics, wetting and biomimetics. In my thesis, I investigate the fundamental problem of how structured liquid-repellent surfaces, which support a composite liquid-air interface, can reduce skin friction in both viscous laminar and turbulent flows. I have performed experimental characterization and applied mathematical modeling to demonstrate that such a macroscopic drag reduction in turbulent flow is indeed sustainable, thus settling a long standing unresolved question.
My research leads to a number of practical applications such as reducing the drag in marine vehicles and energy savings in pipe flows. In addition to this central theme, I have also worked on a mathematical analysis of the gravity driven deformation of drops on non-wetting surfaces, correlating the wetting dynamics on the barbs and barbules of aquatic birds with diving and wing-spreading behavior and on developing a hierarchical model to design oleophobic woven fabrics. Please take a look at my published work for more details.