Electrohydrodynamically driven chaotic mixing in a translating drop
Electrohydrodynamically driven chaotic mixing in a translating drop
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平移液滴中电流体动力学驱动的混沌混合
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
G. Homsy
中科院分区：
文献类型：
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作者：
T. Ward;G. Homsy
当给定介电常数、电阻率和粘度的液滴在不同介电常数、电阻率和粘度的液体中有电场作用时，产生的内循环是Hadamard-Rybcynski和Taylor（四轴）循环的叠加。对于足够大的场强，泰勒流的四轴结构导致内部滞止盘的发生。当该流场被电场的交流分量调制时，在低斯托克斯数下，所得到的拉格朗日粒子轨迹可以表现出混沌行为。这种拉格朗日混沌是通过庞加莱图来检验的，并且在广泛的场强和调制频率范围内研究了混合的程度和速率。
When a liquid drop of given dielectric constant, resistivity and viscosity is translating in the presence of an electric field in a liquid of different dielectric constant, resistivity and viscosity, the resulting internal circulation is a superposition of the Hadamard–Rybcynski and Taylor (quadrapole) circulations. For sufficiently large field strengths, the quadrapole structure of the Taylor flow causes an internal stagnation disk to occur. When this flow field is modulated by an ac component of the electric field, at low Stokes numbers, the resulting Lagrangian particle trajectories can exhibit chaotic behavior. This Lagrangian chaos is examined via Poincare maps and both the degree and rates of mixing are studied for a wide range of field strengths and modulation frequencies.