Abstract Electrohydrodynamic (EHD) flow induced in dielectric fluids by charge injection is capable of producing convective instabilities accompanied by surface deformation of fluids. This work presents the results of experimental observations of the EHD flow induced in bulk dielectric liquid layers using corona discharge. A method for deformation analysis of surface liquid is presented and used to characterize the convective instabilities and bulk deformations formed within the fluid. The governing liquid properties for the deformations are discussed, indicating the vital role of surface tension and viscosity. Critical voltages at which rapid transformation of the liquid’s deformation occurs are identified and discussed. Consideration is also given to the potential application of the EHD flow as an air-wave-type EHD pump, including analyses of pumping performance and its governing parameters. The liquid layer thickness is shown to be a dominant parameter in the efficacy of such proposed pump designs. Graphic abstract

中文翻译：

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电晕引发电荷注入下大容量介电流体的变形

摘要 通过电荷注入在介电流体中引起的电流体动力学 (EHD) 流动能够产生伴随流体表面变形的对流不稳定性。这项工作展示了使用电晕放电在体介电液层中诱导的 EHD 流动的实验观察结果。提出了一种表面液体变形分析方法，用于表征流体内形成的对流不稳定性和体积变形。讨论了变形的控制液体性质，表明了表面张力和粘度的重要作用。确定并讨论了发生液体变形快速转变的临界电压。还考虑了 EHD 流作为空气波型 EHD 泵的潜在应用，包括泵送性能及其控制参数的分析。液体层厚度被证明是这种建议的泵设计效率的主要参数。图形摘要