Estudio experimental de la viscosidad de un fluido magneto-reológico a base de magnetita mineral

Abstract

We experimentally study the viscosity of a magnetorheological (MR) fluid based on mineral magnetite and automotive oil for brakes. We use a Brookfield cone-plate rheometer to which it was adapted a solenoid that produces and controls a magnetic field parallel to the cone rotation axis. Even though the particles contain variable amounts of silica impurities and present a wide dispersion in the sizes, the system experiments important changes in the viscosity as a function of the magnetic field, shear rate and particle mean size. We study the behavior of a simplified MR damper and show some of its advantages respect to a conventional damper.