Investigation of the viscosity of magnetic-liquid systems using the developed capillary viscometer

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Abstract

We studied the viscosity of liquids using a capillary viscometer of our own design. The viscosity value is determined by the pressure drop in the capillary, which makes it possible to study optically opaque liquids and carry out measurements in a magnetic field. A series of calibration experiments were carried out on liquids with a known viscosity value. The obtained dependences of the magnetic-viscous effect in magnetic fluid samples with different structures and physical parameters are consistent with known theoretical and experimental data.

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About the authors

A. A. Churaev

Southwest State University

Email: r-piter@yandex.ru
Russian Federation, Kursk, 305040

E. V. Shel’deshova

Southwest State University

Email: r-piter@yandex.ru
Russian Federation, Kursk, 305040

E. V. Bondar’

Southwest State University

Email: r-piter@yandex.ru
Russian Federation, Kursk, 305040

P. A. Ryapolov

Southwest State University

Author for correspondence.
Email: r-piter@yandex.ru
Russian Federation, Kursk, 305040

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Supplementary files

Supplementary Files
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2. Fig. 1. Block diagram of a capillary viscometer: 1 – capillary, 2 – area in which the pressure difference will be measured, 3 – pressure sensor.

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3. Fig. 2. Block diagram of the setup for measuring the magnetoviscous effect of magnetic fluids under the influence of an external magnetic field: 1 – capillary, 2 – FL-1 electromagnet, 3 – pressure sensor, 4 – syringe pump, 5 – voltmeter, 6 – power source for the sensor, 7 – power source for the electromagnet.

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4. Fig. 3. Dependence of the viscosity ratio on the viscosity of a rotational viscometer.

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5. Fig. 4. Dependence of the magnetoviscous effect of МЖ-2.1, МЖ-2.2, МЖ-2.3 on the magnetic field strength.

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6. Fig. 5. Dependence of the magnetoviscous effect of МЖ-1.1, МЖ-1.3 on the magnetic field strength.

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7. Fig. 6. Dependence of the magnetoviscous effect of МЖ-1.2.1, МЖ-1.2.2 on the magnetic field strength.

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8. Fig. 7. Dependence of the magnetoviscous effect on the concentration of the magnetic fluid.

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