A Review on Sedimentation of Magnetorheological (MR) fluid

Abstract

Magnetorheological (MR) fluid is a smart material used for vibration control where the behavior of fluid can be changed from Newtonian fluid to a semi-solid material (Bingham fluids) by changing the magnetic field. Rheological characteristics of MR fluid change rapidly and be controlled effectively in presence of an applied magnetic field. The Synthesis of MR fluid involves many challenges like magnetic effect of coil, sedimentation and agglomeration of particles.  In this paper, properties of magnetorheological fluids, sedimentation and agglomeration of particles have been discussed. The review covers addition of green additives like guar gum and xanthan gum, challenges in the preparation and use of magnetorheological fluids that include stability, sedimentation, agglomeration, and also oxidation of the particles. The methodology to prepare the fluid along with the process for adding selected additives was reviewed. The results showed an improvement in the reduction of sedimentation and other problems.