Experimental Investigation on Dynamic Characteristics of Highly Viscous Droplets and Liquid Bridges Under the Influence of Electric Fields

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-01-10 DOI:10.1007/s12217-023-10091-8

Shuo Su, Tai Wang, Xiaolong Ma, Zhaojiu Zhang, Chuntao Liu

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Abstract

Formation of highly viscous droplets and liquid bridges under the influence of electric fields is widely used in material preparation, food processing, inkjet printing and 3D (three-dimensional) printing. To investigate the formation of droplets and liquid bridges, a visual experimental platform is designed and constructed. A non-uniform electric field is constructed using a metal capillary and a copper pole plate. By varying the voltage, capillary diameter and liquid volume flow rate, the formation of silicone oil droplets and liquid bridges is investigated. The influence of electric forces to the coiling effect of viscous fluids is researched, which has not been thoroughly investigated in previous research. The results verify that at low volume flow rates and small pipe diameters, the silicone oil formation pattern is in the droplet state. As the voltage increases, the droplet formation period decreases. When the voltage is gradually increased at higher volume flow rates, the silicone oil changes from the initial liquid bridge to the droplet. This experimental phenomenon demonstrates that the electric field can alter the instability of the jet. In the case of small volume flow rates and large pipe diameter, the droplet formation state changes from droplet mode to multi-strand jet mode after the voltage is increased to a certain level. At large pipe diameters and large volume flows rates, the liquid bridge mode with a rope coiling effect occurs due to the highly viscous nature of the silicone oil, but the rope coiling effect disappears after a certain voltage is applied.

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电场影响下高粘性液滴和液桥动态特性的实验研究

摘要高粘度液滴和液桥在电场作用下的形成广泛应用于材料制备、食品加工、喷墨打印和三维打印等领域。为了研究液滴和液桥的形成，我们设计并搭建了一个可视化实验平台。利用金属毛细管和铜极板构建了一个非均匀电场。通过改变电压、毛细管直径和液体体积流量，研究了硅油液滴和液桥的形成。研究了电场力对粘性流体卷绕效应的影响，这在以往的研究中还没有得到深入探讨。结果验证了在低体积流量和小管径条件下，硅油的形成模式为液滴状态。随着电压的增加，液滴形成期缩短。在较高体积流量下逐渐增加电压时，硅油会从最初的液桥转变为液滴。这一实验现象表明，电场可以改变射流的不稳定性。在体积流量较小、管道直径较大的情况下，电压升高到一定程度后，液滴的形成状态会从液滴模式转变为多股射流模式。在大管径和大流量的情况下，由于硅油的高粘性，会出现带有卷绳效应的液桥模式，但在施加一定电压后，卷绳效应会消失。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.