Influence of surface viscosities on the electrodeformation of a prolate viscous drop
Influence of surface viscosities on the electrodeformation of a prolate viscous drop
复制标题
表面粘度对长形粘性液滴电形成的影响
DOI：
10.1039/d2sm01307j
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发表时间：
2023
期刊：
影响因子：
3.4
通讯作者：
Young, Y.-N.
中科院分区：
文献类型：
--
作者：
Nganguia, H.;Das, D.;Pak, O. S.;Young, Y.-N.
污染物和其他试剂通常存在于两种流体之间的界面处，从而产生流变特性，例如表面剪切和流变粘度。近年来，由于表面流变性对变形和周围流动的影响，具有界面粘度的粘性液滴动力学引起了人们更大的兴趣。利用Taylor-Melcher漏电介质模型研究了剪切粘度和折射率粘度对粘性液滴电变形的影响。我们使用一个大变形分析，推导出一个常微分方程的滴形状。我们的模型阐明了每一个力的贡献的整体变形的下降，并揭示了丰富的动态行为，显示表面粘度的影响和它们对系统的流变学和电学性质的依赖。我们还通过分析表面膨胀和表面变形来研究所观察到的行为的物理机制。
Contaminants and other agents are often present at the interface between two fluids, giving rise to rheological properties such as surface shear and dilatational viscosities. The dynamics of viscous drops with interfacial viscosities has attracted greater interest in recent years, due to the influence of surface rheology on deformation and the surrounding flows. We investigate the effects of shear and dilatational viscosities on the electro-deformation of a viscous drop using the Taylor–Melcher leaky dielectric model. We use a large deformation analysis to derive an ordinary differential equation for the drop shape. Our model elucidates the contributions of each force to the overall deformation of the drop and reveals a rich range of dynamic behaviors that show the effects of surface viscosities and their dependence on rheological and electrical properties of the system. We also examine the physical mechanisms underlying the observed behaviors by analyzing the surface dilatation and surface deformation.