Viscosity of a dilute suspension in a high-frequency electromagnetic field

The action of a high-frequency electromagnetic field on a dilute suspension of spherical particles with a constant dipole moment is studied using statistical mechanics. An expression for effective viscosity is obtained. It is shown that the shear viscosity of the dilute suspension depends on the frequency, magnitude, and direction of the high-frequency electromagnetic field. Depending on the frequency of the high-frequency electromagnetic field, the rotation of the suspension particles is decelerated or accelerated, with the viscosity increasing or decreasing, respectively. It is shown that the acceleration of the suspension particles by a high-frequency electromagnetic field and, hence, the decrease in shear viscosity has a resonant nature.