Dielectric fluid in inhomogeneous pulsed electric field.
Dielectric fluid in inhomogeneous pulsed electric field.
复制标题
非均匀脉冲电场中的介电流体。
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
M. Pekker
中科院分区：
文献类型：
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作者：
M. Shneider;M. Pekker
我们考虑在强非均匀非平稳电场中电致伸缩有质动力影响下可压缩流体的动力学。结果表明，如果在尖锐的针状电极处电压上升的前沿相当陡峭（小于或大约纳秒），则会出现负压区域，该区域可能达到流体失去连续性并形成空化破裂的值。如果电极上的电压不够大或前端较平坦，则液体中不会发生空化。然而，磁场的突然关闭会导致液体从电极反向流动，从而导致出现负压，并可能导致空化。
We consider the dynamics of a compressible fluid under the influence of electrostrictive ponderomotive forces in strong inhomogeneous nonstationary electric fields. It is shown that if the fronts of the voltage rise at a sharp, needlelike electrode are rather steep (less than or about nanoseconds), the region of negative pressure arises, which can reach values at which the fluid loses its continuity with the formation of cavitation ruptures. If the voltage on the electrode is not large enough or the front is flatter, the cavitation in the liquid does not occur. However, a sudden shutdown of the field results in a reverse flow of liquid from the electrode, which leads to appearance of negative pressure, and, possibly, cavitation.