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A Simple Approach to Characterize Gas-Aqueous Liquid Two-phase Flow Configuration Based on Discrete Solid-Liquid Contact Electrification SCIE SCOPUS

Title
A Simple Approach to Characterize Gas-Aqueous Liquid Two-phase Flow Configuration Based on Discrete Solid-Liquid Contact Electrification
Authors
Choi, DLee, DKim, DS
Date Issued
2015-10-14
Publisher
Nature Publishing Group
Abstract
In this study, we first suggest a simple approach to characterize configuration of gas-aqueous liquid two-phase flow based on discrete solid-liquid contact electrification, which is a newly defined concept as a sequential process of solid-liquid contact and successive detachment of the contact liquid from the solid surface. This approach exhibits several advantages such as simple operation, precise measurement, and cost-effectiveness. By using electric potential that is spontaneously generated by discrete solid-liquid contact electrification, the configurations of the gas-aqueous liquid two-phase flow such as size of a gas slug and flow rate are precisely characterized. According to the experimental and numerical analyses on parameters that affect electric potential, gas slugs have been verified to behave similarly to point electric charges when the measuring point of the electric potential is far enough from the gas slug. In addition, the configuration of the gas-aqueous liquid two-phase microfluidic system with multiple gas slugs is also characterized by using the presented approach. For a proof-of-concept demonstration of using the proposed approach in a selftriggered sensor, a gas slug detector with a counter system is developed to show its practicality and applicability.
URI
https://oasis.postech.ac.kr/handle/2014.oak/36305
DOI
10.1038/SREP15172
ISSN
2045-2322
Article Type
Article
Citation
Scientific Reports, vol. 5, page. 15172, 2015-10-14
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김동성KIM, DONG SUNG
Dept of Mechanical Enginrg
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