Experimental study of magnetorheological fluids formed used particle mixtures

The viscosity of magnetorheological (MR) fluids, which are formed by suspending particle mixtures in ferrofluids, increases within a few milliseconds of a magnetic field being applied, and goes back to the original value once the magnetic field is removed. Thus, MR fluids are appropriate for applications in which adjustable viscosity with a short response time is desired. The viscosity increases when the magnetic field is applied as a fraction of the particles become positively magnetized, while the rest are negatively magnetized. These dipoles then interact to form chains and columns aligned in the field’s direction and in the perpendicular plane. This work aims to study the dependence of the magnetorheological response on the properties, proportions, and size distribution of the particles.