Start
Jan 11, 2018 - 15:30
End
Jan 11, 2018 - 16:30
Venue
Room 230 Chemical Engg Dept
Event Type
Speaker
Prof. Kirti Sahu Department of Chemical Engineering IIT Hyderabad
Title
Bubbles and Drops: Natural Phenomena to Industrial Applications
Abstract: In this talk some interesting phenomena which occur in bubbles and drops when they rise or fall under the action of gravity will be discussed. First different regimes of an air bubble in terms of path instability and shape will be discussed. Then we will see how this behaviour of an air bubble gets modified by the presence of another bubble of the same size rising simultaneously. What happens when an air bubble rises a viscosity stratified medium? The viscosity-stratification can be achieved by the presence of concentration or temperature gradients. Another fundamental question are the dynamics of bubbles and drops similar if we invert the gravity will be discussed next. Finally the role of vortex shedding on a falling drop which is responsible for the wobbling motion in case of bubble will be discussed.Bio: Prof. Sahu joined the Chemical and Biological Engineering Department at IIT Hyderabad in 2009. He did his PhD in JNCASR (Bangalore) in 2007 following which he had a posdoctoral appointment at the Imperial College (London). His research interests include raindrops bubbles transition to turbulence and linear stability theory.