Saptarshi Basu, Department of Mechanical Engineering, Indian Institute of Science, Bengaluru

Tuesday, 5 October 2021, 06:30-07:45 AM (Los Angeles), 09:30-10:45 (New York), 14:30-15:45 (London), 15:30-16:45 (Berlin), 19:00-20:15 (New Delhi), 21:30-22:45 (Beijing), 22:30-23:45 (Tokyo)

Abstract: I will provide an account of the interesting dynamics exhibited by droplets at multiple length and time scales in completely different domains, namely gas turbines and COVID-19.

In the first part of my talk, I will provide some insights into the dynamics of spray-swirl interaction with a particular focus on droplet transport, breakup and dispersion. I will show how the fundamental insights gained through such interactions can be used to design a new class of atomizers in gas turbines.

In the second part of my talk, I will discuss how the spread of COVID can happen through respiratory droplets and fomites. In this part, I will provide a detailed exposition of how respiratory droplet dynamics can be combined with a pandemic model to provide a first principle insights into infection spread rates. We will show through experiments using surrogate fluids how such models can be experimentally verified rigorously. Subsequently, I will show how fomites form and how the virions are embedded in the crystal network using both contact free as well as sessile droplets.

About the presenter: 

BasuProf. Saptarshi Basu is currently DRDO Chair Professor in the department of mechanical engineering at IISc.

Prof. Basu primarily works on multiphase systems, especially droplets at multiple length and timescales across multiple application domains. He is a fellow of the Indian National Academy of Engineering, ASME, the Institute of Physics, the Royal Aeronautical Society and the Royal Society of Chemistry. Prof. Basu is the recipient of the DSTSwarnajayanti Fellowship in engineering.

Register here or livestream the webinar on YouTube

About the IJMF Spotlight V-Seminar Series

In early 20202, the International Journal of Multiphase Flow (IJMF) launched a series of virtual V-seminars for the benefit of the journal, its authors, and the multiphase flow community at large. Our goal is to hold these V-seminars for an initial two-year period, until the end of 2022. We intend to promote communication among the multiphase flow community, which has suffered during the Covid pandemic.

Speakers are selected by a seminar-selection committee, whose members are decided by the editors-in-chief of IJMF. The selection committee for 2021-2022 is: S. Balachandar (UF), Alfredo Soldati (TUW), Ted Heindel (ISU), and Shu Takagi (TU). The following criteria will be used in both the nomination and the selection processes: (1) The speaker must be one of the primary authors of a recent outstanding IJMF publication within the past year; (2) The quality of publication will be partly judged by the reviews received; and (3) The speaker has a record of providing outstanding presentations. Although the speakership is open to all researchers, emphasis will be placed on younger researchers who are either at the beginning or midway through their professional careers.

The nominations for seminar speakers can be made by anyone to the editors-in-chief of IJMF. Nominations must both cite a recent IJMF article by the nominee and provide evidence for the nominee’s ability as a good speaker.

The IJMF Spotlight V-Seminar Series is intended to provide a regular platform to bring the multiphase flow community together and to give the opportunity to up-and-coming researchers to gain greater exposure and recognition for their work.