Generation of Fluid Driving Force in Liquid-Metal Magnetic Fluid Flowing in Increasing Magnetic Field

Abstract

Three-dimensional numerical calculations have been performed on the generation of fluid driving force in liquidmetal magnetic fluid (liquid-metal including ferromagnetic particles) and water magnetic fluid (water including ferromagnetic particles) flowing in an increasing magnetic field. It has become clear from the calculations that the liquidmetal magnetic fluid including ferromagnetic particles with volume concentrations greater than 0.001 can produce the magnetic force which overcomes the Lorentz force and thus can generate the fluid driving force. Next, experiments have been performed using water magnetic fluid. These experimental results by the authors and others in literatures are compared with numerical results obtained by the present calculations. It has been proved that the present numerical calculations can predict nearly the pressure increase observed in the experiments if the magnetization of the magnetic fluid is given exactly.