Promoting rebound from droplet impact on a spherical particle: Experimental and numerical study

Autor:	Ikroh Yoon, Chiwook Ha, Choongyeop Lee, Seungwon Shin
Rok vydání:	2022
Předmět:	Fluid Flow and Transfer Processes Mechanics of Materials Mechanical Engineering Computational Mechanics Condensed Matter Physics
Zdroj:	Physics of Fluids. 34:103302
ISSN:	1089-7666 1070-6631
Popis:	In this study, we experimentally and numerically investigate the activity of a rebounding droplet on a spherical particle and the effects of surface curvature on its rebounding behavior. We report that the rebound of the droplet can be promoted in smaller particles. As the droplet-to-particle size ratio increases, the critical Weber number is significantly reduced, and the restitution coefficient is much increased. The underlying physical mechanism for the promotion of the rebound is the reduced energy dissipation on the smaller particles in the very early stages of the collision, and this reduction mainly occurs as the liquid is being squeezed. This reduced energy loss allows larger liquid–gas interfacial deformation at the maximum spreading state and also allows more drastic retractions during the recoiling stage, which eventually leads to the promotion of the rebound.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7fc79b5aaa61d17bb858fa8a464f76d3 https://doi.org/10.1063/5.0111074 Zobrazit plný text záznamu