Abstract

Particle Image Velocimetry (PIV) is used to study the nonstationary flow pattern around a drop of a dielectric liquid of dibutyl phthalate surrounding water of weak conductivity under the action of a microsecond current pulse. It has been found that the time of existence of the induced vortex flow in water significantly exceeds the duration of the current pulse. During the action of the pulse, only small perturbations develop on the surface of the drop, while the final perturbations of the surface develop at much longer times, exceeding the duration of the current pulse by two or more orders of magnitude, and are associated with the evolution of the water flow around the drop. It is shown that the value of the maximum velocity in the induced water flow is affected by the potential of the needle at a constant duration and amplitude of the current.

中文翻译：

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水中电介质滴在微秒电流脉冲下的变形

摘要

粒子图像测速（PIV）用于研究在微秒电流脉冲作用下，邻苯二甲酸二丁酯介电液体周围的弱电导率水滴周围的非平稳流动模式。已经发现，水中感应涡流的存在时间明显超过电流脉冲的持续时间。在脉冲作用期间，液滴表面仅产生小的扰动，而表面的最终扰动产生的时间要长得多，超过电流脉冲的持续时间两个或多个数量级，并且与水滴周围水流的演变。结果表明，在电流持续时间和幅值恒定的情况下，诱导水流的最大速度值受到针电位的影响。