Transient electrohydrodynamics of a liquid drop.
Transient electrohydrodynamics of a liquid drop.
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DOI：
10.1103/physreve.84.036308
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发表时间：
2011-09
期刊：
影响因子：
--
通讯作者：
A. Esmaeeli;P. Sharifi
中科院分区：
文献类型：
--
作者：
A. Esmaeeli;P. Sharifi
研究了均匀小电场作用下漏液滴的瞬态行为。结果表明，当液滴从球形变形到椭球形时，变形时间历程可用D=D（∞）[1-exp（-t/τ）]表示，其中D（∞）为稳态变形，τ=（aμ（o）/γ）（19μ+16）（2μ+3）/（40μ+40）为特征时间，a，γ，μ（o）和μ为液滴半径，表面张力，环境流体的粘度和液滴粘度与环境流体的粘度之比。还确定了净法向和切向电应力在变形程度和流体流动强度中的贡献。
The transient behavior of a leaky dielectric liquid drop under a uniform electric field of small strength is investigated. It is shown that for small distortion from a spherical shape, the drop deforms to an ellipsoid, and the deformation time history is represented by D=D(∞)[1-exp(-t/τ)], where D(∞) is the steady-state deformation and τ=(aμ(o)/γ)(19μ+16)(2μ+3)/(40μ+40)is the characteristic time, a, γ, μ(o) and μ being the drop radius, the surface tension, the viscosity of ambient fluid, and ratio of the drop viscosity to that of the ambient fluid, respectively. The contributions of the net normal and tangential electrical stresses in the degree of deformation and fluid flow strength are also determined.