Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session A12: Drops: General I
8:00 AM–9:57 AM,
Sunday, November 18, 2018
Georgia World Congress Center Room: B217
Chair: Monica Nitsche, University of New Mexico
Abstract ID: BAPS.2018.DFD.A12.1
Abstract: A12.00001 : Shape oscillations in an initially nonspherical raindrop*
8:00 AM–8:13 AM
Manoj Kumar Tripathi
(Indian Institute of Science Education and Research Bhopal)
(Indian Institute of Technology Hyderabad)
The dynamics of a nonspherical droplet falling in air is investigated via three-dimensional numer- ical simulations of the Navier-Stokes and continuity equations. The main focus of this work is to study the effects of the relative influence of surface tension force over the inertial force, and the orientation of the droplet. The range of parameters considered in this study is similar to a falling raindrops. A theoretical analysis is also conducted by neglecting gravity and in the limit of creep- ing flow. The expressions of the frequency and decay rate of the shape oscillations of a raindrop are derived, and compared against the the direct numerical simulation results. To the best of our knowledge, the influence of these physical parameters has not been considered so far in the context of raindrops.
*We thanks Department of Science and Technology, India for financial support.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.A12.1
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