Breakup of an electrified, perfectly conducting, viscous thread in an AC field.

Breakup of an electrified, perfectly conducting, viscous thread in an AC field.
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交流场中带电、完美导电、粘性线的破裂。

DOI:
10.1103/physreve.83.066314
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发表时间:
2011
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
通讯作者:
Conroy DT
Conroy DT
中科院分区:
--
文献类型:
--
作者:
Conroy DT

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本文研究了在随时间变化的交流电场作用下,同心圆柱形电极包围的细长射流的轴对称破碎和卫星形成。射流被假定为一个理想的导电粘性流体和介质的无粘气体包围。我们使用长波近似推导出耦合的界面位置和轴向速度分量,占静电强迫的演化方程。在这种情况下的静电力是大的,并与毛细管力附近的破裂点竞争,导致界面振荡和卫星的形状是不同的DC的情况。特别是,我们的研究结果表明,它可能是可以使用AC场来控制伴随分裂的卫星的数量以及它们的大小。
We study the axisymmetric breakup and satellite formation of slender jets surrounded by a concentrically placed cylindrical electrode and subjected to time-dependent AC electric fields. The jet is assumed to be a perfectly conducting viscous fluid and surrounded by a dielectric inviscid gas. We use the long-wave approximation to derive coupled evolution equations for the interface position and the axial velocity component, which accounts for electrostatic forcing. The electrostatic force in this case is large and competes with capillary forces near the rupture point, causing the interface to oscillate and the satellite to have shapes that are distinct from the DC case. In particular, our results indicate that it may be possible to use the AC field to control the number of satellites accompanying breakup as well as their size.
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影响因子: 4.6
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