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Electrocapillary Instability of Magnetic Fluid Peak
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posted on 2016-02-19, 02:55 authored by Levon Mkrtchyan, Arthur Zakinyan, Yuri DikanskyThis
Article presents an experimental study of the capillary electrostatic
instability occurring under the effect of a constant electric field
on a magnetic fluid individual peak. The peaks under study occur at
disintegration of a magnetic fluid layer applied on a flat electrode
surface under the effect of a perpendicular magnetic field. The electrocapillary
instability shows itself as an emission of charged drops jets from
the peak point in direction of the opposing electrode. The charged
drops emission repeats periodically and results in the peak shape
pulsations. It is shown that a magnetic field affects the electrocapillary
instability occurrence regularities and can stimulate its development.
The critical electric and magnetic field strengths at which the instability
occurs have been measured; their dependence on the peak size is shown.
The hysteresis in the system has been studied; it consists in that
the charged drops emission stops at a lesser electric (or magnetic)
field strength than that of the initial occurrence. The peak pulsations
frequency depending on the magnetic and electric field strengths and
on the peak size has been measured.