Rotational Viscosity of Viscoelastic Magnetic Fluid

Yu. L. Raikher and V. V. Rusakov

Institute of Continuous Media Mechanics, Ural Branch, Russian Academy of Sciences,
ul. Akademika Koroleva 1, Perm, 614013 Russia

Received April 20, 2007

Abstract—The influence of a magnetic field on the viscosity of dilute dispersion of spherical magnetohard par-
ticles in viscoelastic matrix, the Maxwell liquid with a single relaxation time, is studied. Calculations are per-
formed on the basis of the equation of rotational diffusion derived previously by the authors. It is shown that
the effective viscosity of magnetic fluid decreases in the presence of a field. This unexpected result is clearly
explained in physical terms.

DOI: 10.1134/S1061933X08010122

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