Influence of Brownian diffusion on statics of magnetic fluid

V. G. Bashtovoi¹ - V. K. Polevikov² - A. E. Suprun³ - A. V. Stroots³ - S. A. Beresnev²

¹ Belarusian National Technical University, 65 Nezavisimosti Ave., Minsk 220013, Belarus
² Belarusian State University, Minsk 220000, Belarus
³ Ferrolabs, Inc., 21525 Ridgetop Circle, Suite 260, Dulles VA 20166, USA

Abstract
In the present study, the influence of Brownian diffusion of magnetic particles in a magnetic fluid on a force, which acts upon a fluid volume under an external inhomogeneous magnetic field to be induced by a pair of flat poles, is considered in plane geometry. It is shown that the re-distribution of magnetic particle concentration causes this force to undergo considerable changes with time. Figs 6, Refs 7.