Electrohydrodynamic Instability and Electrodispersion of Liquids (Review)

IF 0.9 Q3 Engineering
A. I. Grigoriev, A. A. Shiryaev
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引用次数: 0

Abstract

The electrohydrodynamic instability of the charged liquid surface manifests itself in the instability of a highly charged drop, the instability of a charged drop in superposition of external electrostatic field and gravitational field, and the instability of flat charged surface of electroconductive liquid. Attempts to experimentally verify the correctness of the criterion of electrohydrodynamic instability of a highly charged drop, the Rayleigh criterion, which began in the middle of the last century and continue to the present, confirm it but with some error that does not decrease over the years (with the improvement of the instrument base), which indicates the principle of such an error. In general, the need to position the droplet implies the influence of certain external fields that deform the droplet and, thereby, affect the accuracy of the determined Rayleigh criterion. An experimental and numerical study of the instability of an uncharged drop in an external electrostatic field, the Taylor drop instability, shows its qualitative similarity to the instability of a charged Rayleigh drop. Somewhat apart is the electrohydrodynamic instability of the flat surface of the liquid, the Tonks–Frenkel instability, well studied theoretically but poorly experimentally, due to the fact that high-speed movie cameras have relatively recently entered scientific use.

液体的电流体动力学不稳定性和电分散(综述)
带电液体表面的电流体动力学不稳定性表现为高电荷液滴的不稳定性、外加静电场和引力场叠加作用下带电液滴的不稳定性以及导电液体平坦带电表面的不稳定性。尝试用实验验证高电荷滴的电流体动力不稳定性判据的正确性,瑞利判据,从上世纪中叶开始一直持续到现在,证实了这一点,但有一些误差,随着时间的推移(随着仪器基础的改进)没有减少,这表明了这种误差的原理。一般来说,需要定位液滴意味着某些使液滴变形的外部场的影响,从而影响所确定的瑞利判据的准确性。对不带电液滴在外加静电场中的不稳定性——泰勒液滴的不稳定性进行了实验和数值研究,结果表明它与带电瑞利液滴的不稳定性在定性上相似。稍微不同的是液体平坦表面的电流体动力学不稳定性,唐克斯-弗伦克尔不稳定性,理论上研究得很好,但实验上研究得很差,这是由于高速电影摄像机最近才进入科学应用。
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来源期刊
Surface Engineering and Applied Electrochemistry
Surface Engineering and Applied Electrochemistry Engineering-Industrial and Manufacturing Engineering
CiteScore
1.60
自引率
22.20%
发文量
54
期刊介绍: Surface Engineering and Applied Electrochemistry is a journal that publishes original and review articles on theory and applications of electroerosion and electrochemical methods for the treatment of materials; physical and chemical methods for the preparation of macro-, micro-, and nanomaterials and their properties; electrical processes in engineering, chemistry, and methods for the processing of biological products and food; and application electromagnetic fields in biological systems.
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