Water film coated composite liquid metal marble and its fluidic impact dynamics phenomenon

doi:10.1007/s11708-015-0388-0

Front. Energy

2016, Vol. 10

Issue (1) : 29-36 https://doi.org/10.1007/s11708-015-0388-0

RESEARCH ARTICLE

Water film coated composite liquid metal marble and its fluidic impact dynamics phenomenon

Yujie DING¹,Jing LIU^2,^*(

)

1. Key Lab of Cryogenics and Beijing Key Lab of CryoBiomedical Engineering, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
2. Key Lab of Cryogenics and Beijing Key Lab of CryoBiomedical Engineering, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190; Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing 100084, China

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Abstract

A composite liquid metal marble made of metal droplet coated with water film was proposed and its impact dynamics phenomenon was disclosed. After encapsulating the liquid metal into water droplets, the fabricated liquid marble successfully avoided being oxygenized by the metal fluid and thus significantly improved its many physical capabilities such as surface tension modification and shape control. The striking behaviors of the composite liquid metal marbles on a substrate at room temperature were experimentally investigated in a high speed imaging way. It was disclosed that such marbles could disintegrate, merge, and even rebound when impacting the substrate, unlike the existing dynamic fluidic behaviors of liquid marble or metal droplet. The mechanisms lying behind these features were preliminarily interpreted. This fundamental finding raised profound multiphase fluid mechanics for understanding the complex liquid composite which was also critical for a variety of practical applications such as liquid metal jet cooling, inkjet printed electronics, 3D printing or metal particle fabrication etc.

Keywords liquid metal marble metallic droplet composite fluid impact dynamics multiphase fluid mechanics

Corresponding Author(s): Jing LIU

Just Accepted Date: 02 November 2015 Online First Date: 04 January 2016 Issue Date: 29 February 2016

Cite this article:

Yujie DING,Jing LIU. Water film coated composite liquid metal marble and its fluidic impact dynamics phenomenon[J]. Front. Energy, 2016, 10(1): 29-36.

URL:

https://academic.hep.com.cn/fie/EN/10.1007/s11708-015-0388-0
https://academic.hep.com.cn/fie/EN/Y2016/V10/I1/29

Fig.1 Exhibition and preparation of liquid metal droplets at different conditions

(a) Liquid metal droplet covered by oxide layer in the air; (b) liquid metal droplet coated with water; (c) a drop of water was put at the needle point; (d) contact the liquid metal droplet and water together; (e) liquid metal was pumped into the water droplet to form a composite liquid metal marble

Fig.2 Dynamic impact processes of metal droplets at a speed of 1.90 m/s

(a) 4.77 mm liquid metal droplet; (b) 5.38 mm composite liquid metal marble; (c) side view of (a); (d) side view of (b)

Fig.3 Dynamic impact process of 5.38 mm composite liquid metal marble at a speed of 2.95 m/s

Fig.4 Dynamic impact processes of metal droplets at various impact velocities

(a) At a velocity of 1.90 m/s and a diameter of 2.61 mm; (b) at a velocity of 1.27 m/s and a diameter of 2.75 mm; (c) at a velocity of 1.90 m/s and a diameter of 2.75 mm; (d) at a velocity of 2.95 m/s and a diameter of 2.75 mm

Fig.5 Variation of droplets diameter with dimensionless time for various impact velocities

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