Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session T19: Drops: Instability and Break-up I
4:25 PM–6:09 PM,
Monday, November 20, 2023
Room: 146B
Chair: Stephane Zaleski, Sorbonne Universite
Abstract: T19.00006 : Aerobreakup of a liquid metal droplet*
5:30 PM–5:43 PM
Presenter:
Shubham Sharma
(Indian Institute of Science Bangalore)
Authors:
Shubham Sharma
(Indian Institute of Science Bangalore)
Navin K Chandra
(Indian Institute of Science of Bangalore)
Aloke Kumar
(Indian Institute of Science Bangalore)
Saptarshi Basu
(Indian Institute of Science Bangalore)
In this study, a comprehensive comparison is made between the atomization dynamics of conventional fluids and liquid metals under oxidizing and inert conditions on different spatial and temporal scales. The liquid metal droplet experiences breakup through the Shear-Induced Entrainment (SIE) mode within the examined range of Weber numbers. The mechanism governing this breakup is elucidated by considering the relative dominance of droplet deformation and KH wave formation. Notably, the research presents quantitative and qualitative similarities among the three test cases while highlighting the distinctions in the morphology of fragmenting secondary droplets in the oxidizing test case (Galinstan-air) due to the rapid oxidation of the fragmenting ligaments. Additionally, a phenomenological framework is proposed for predicting the morphology of secondary droplets. The unique formation of flake-like secondary droplets observed in the Galinstan-air test case is attributed to the oxidation rate of liquid metals and the properties of the oxide layer formed on the atomizing ligament surface.
*The authors acknowledge support from IGSTC (Indo–German Science and Technology Center) through project no. SP/IGSTC-18-0003.
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