Crown evolution kinematics of a camellia oil droplet impacting on a liquid layer

doi:10.1088/1674-1056/ac46c1

Abstract The phenomenon of droplet impact on an immiscible liquid is encountered in a variety of scenarios in nature and industrial production. Despite exhaustive research, it is not fully clear how the immiscibility of the liquid on which a droplet impacts affects the crown evolution. The present work experimentally investigates the evolution kinematics of a crown formed by the normal impact of a camellia oil droplet on an immiscible water layer. Based on discussion of dynamic impact behaviors for three critical Weber numbers (We), the radius of the crown and its average spreading velocity are compared with those of previous theoretical models to discuss their applicability to the immiscible liquid. The evolution kinematics (morphology and velocity) are analyzed by considering the effects of the We and layer thickness. Furthermore, the ability of crown expansion in radial and vertical directions is characterized by a velocity ratio. The results show that our experimental crown radius still follows a square-root function of evolution time, which agrees with the theoretical predictions. The dimensionless average spreading velocity decreases with We and follows a multivariate power law, while the dimensionless average rising velocity remains constant. The velocity ratio is shown to linearly increase with We, demonstrating that the rising movement in crown evolution gradually enhances with We. These results are helpful for further investigation on the droplet impact on an immiscible liquid layer.

Keywords: biomass oil droplet impact crown kinematics

Received: 12 July 2021
Revised: 27 December 2021
Accepted manuscript online:

PACS:	47.55.db	(Drop and bubble formation)
	47.55.Ca	(Gas/liquid flows)
	47.54.De	(Experimental aspects)

Fund: Project supported by the Natural Science Foundation of Zhejiang Province of China (Grant No.LY15E060007) and Innovation Ability Promotion of Science&Technology SMEs of Shandong Province,China (Grant No.2021TSGC1339).

Corresponding Authors: Guanqing Wang,E-mail:gqwang@hdu.edu.cn
E-mail: gqwang@hdu.edu.cn

About author: 2021-12-29

Cite this article:

Zhongyu Shi(石中玉), Guanqing Wang(王关晴), Xiangxiang Chen(陈翔翔), Lu Wang(王路), Ning Ding(丁宁), and Jiangrong Xu(徐江荣) Crown evolution kinematics of a camellia oil droplet impacting on a liquid layer 2022 Chin. Phys. B 31 054701

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Crown evolution kinematics of a camellia oil droplet impacting on a liquid layer

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