Bulletin of the American Physical Society
77th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 24–26, 2024; Salt Lake City, Utah
Session X09: Drops: General II
8:00 AM–10:23 AM,
Tuesday, November 26, 2024
Room: Ballroom I
Chair: Maksim Mezhericher, Princeton University
Abstract: X09.00008 : Investigation of Lubricant Film Dynamics due to Drops on Slippery Surfaces*
9:31 AM–9:44 AM
Presenter:
Shivam Gupta
(Institute of Technology Kanpur, India)
Authors:
Shivam Gupta
(Institute of Technology Kanpur, India)
Zhaoe Dai
(Peking University, China)
Krishnacharya Khare
(Institute of Technology Kanpur, India)
By employing the principles of fluid dynamics and dual wavelength reflection interference contrast microscopy (DW-RICM), we present a comprehensive numerical and experimental study that addresses the short and long-time dynamics of a lubricant film due to a deposited drop. We find that the drainage dynamics are significantly affected by the initial coated lubricant thickness and the Laplace pressure of the drop. The experimental observations for the temporal change in the complete lubricant profile under the drop are also compared with the numerical predictions and a good quantitative agreement is found between them.
[1] Bohn, H. F. & Federle, W. Insect aquaplaning: Nepenthes pitcher plants capture prey with the peristome, a fully wettable water-lubricated anisotropic surface. Proc. Natl Acad. Sci. 101, 14138–14143 (2004).
[2] Wong, TS., Kang, S., Tang, S. et al. Bioinspired self-repairing slippery surfaces with pressure-stable omniphobicity. Nature 477, 443–447 (2011).
[3] Dai, Z., & Vella, D. Droplets on lubricated surfaces: The slow dynamics of skirt formation. Phys. Rev. Fluids 7, 054003 (2022).
*Fund for Improvement of S&T Infrastructure in Universities and Higher Educational Institutions (FIST) by Department of Science & Technology (DST), Government of India, Prime Minister's Research Fellows (PMRF) Scheme of the Government of India.
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