Study of electroconvection in magnetic fluids by dynamic light scattering

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Abstract

Electroconvection in kerosene-based magnetic fluids was experimentally studied using the method of dynamic light scattering. A decrease in the relaxation time of the autocorrelation function was discovered at various voltages and interelectrode distances. Based on experimental data, the dependences of the maximum speed of chaotic electroconvective flows on the voltage on the electrodes and the distance between them were determined.

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About the authors

C. V. Yerin

North Caucasus Federal University

Author for correspondence.
Email: exiton@inbox.ru

Физико-технический факультет

Russian Federation, Stavropol

I. V. Eskova

North Caucasus Federal University

Email: exiton@inbox.ru

Физико-технический факультет

Russian Federation, Stavropol

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Supplementary files

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2. Fig. 1. Change in the shape of autocorrelation functions with increasing voltage between electrodes (interelectrode distance 5 mm).

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3. Fig. 2. Change in the shape of autocorrelation functions with increasing voltage between electrodes (interelectrode distance 2 mm).

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4. Fig. 3. Autocorrelation functions in an electric field (voltage 2 kV, interelectrode distance 2 mm). Points are the experiment, line is the calculation using formula (3) at γ=2.4 mm/s.

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5. Fig. 4. Dependence of the maximum velocity of EHD currents on the voltage between the electrodes.

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