Enhanced charge transfer in dielectric fluids containing conducting particles

P. Felsenthal, B. Vonnegut
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引用次数: 29

Abstract

The motion of conducting particles in electrically stressed dielectric fluids has been examined with the intention of explaining enhanced charge transfer between electrodes in the fluid-particle system. The motion of the particles is due to induction charging and the consequent forces exerted on the particles by an electric field. It is shown that the usual assumptions relating to the velocity of such particles are not substantiated by experiments. The dependence of the enhanced charge transfer on the applied field is derived for one particular case. For this case the study of particle motion shows that particles of different sizes move with a charge equivalent to a maximum voltage on the particle of the order of 16 v. If it is assumed that the particles initially become charged when in contact with one of the electrodes, and on leaving the electrodes are shielded so that the effective charge is reduced, it is possible to show that the current is proportional to the square of the applied voltage, which is in agreement with experimental results.
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含有导电粒子的介电流体中增强的电荷转移
为了解释流体-粒子系统中电极间电荷转移的增强,研究了带电介质流体中导电粒子的运动。粒子的运动是由于感应电荷和由此产生的电场施加在粒子上的力。结果表明,关于这类粒子的速度的通常假设是不能被实验证实的。在一个特殊情况下,导出了增强电荷转移与外加电场的关系。对这种情况下粒子运动的研究表明,粒子大小不同的移动费用相当于一个粒子的最大电压的顺序16 v .如果假设粒子最初成为带电时接触的一个电极,和离开电极屏蔽的有效电荷减少,可以显示当前正比于电压的平方,这与实验结果一致。
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