A Review on the Magnetorheological Fluid, Damper and Its Applications for Seismic Mitigation

Abstract

Magnetorheological (MR) fluids and dampers have wide advances as smart materials because of its unique properties, notably, viscosity increases in the presence when magnetic field applied MR Fluids composed of three key components, including carrier fluid, surfactants and metal particles. The major applications of MR Fluids are in brakes, dampers, journal bearings, fluid clutches, pneumatic artificial muscles, aerospace etc. where electrical energy is converted to mechanical energy (Damping Force) in a controlled manner. Within a few milliseconds the fluid converts from liquid to semi solid state. Over the years, researchers were concerned on the ways to enhance the modelling precision. Though the proposed Dynamic models of MR Dampers represent displacement and force behaviour. In this review paper, the advances of MR Fluids, MR Damper, Damper Models, Energy harvesting and their applications for seismic resistance of structures are briefly discussed in the present study.

Effect of Non-uniform Magnetic Field on Non-newtonian Fluid Separation in a Diffuser

“…According to Table 2b, the separation occurs at Ha=4 and the reverse flow is observed for Ha less than 4. As shown in Figure 4c, for Ha=4 the flow velocity is tangent to the wall, and according to Figure 5c, the value of F (1)  is zero. With increasing Ha, i.e.…”

“…The study of non-Newtonian fluid flow has been appealing many interests, due to its numerous industrial and engineering applications including polymer technology, condensed matter physics, astrophysics, geophysics, environmental, biophysics and molten plastics, etc. Furthermore, according to literature, the subject of the MHD fluid flows have been considered in many research works using different methods [1][2][3][4][5], and fluid flow in the nozzle has been investigated with different methods as well [6,7]. Makinde [8] investigated the effect of arbitrary magnetic Reynolds number on a steady flow of an incompressible conducting viscous liquid in divergent channels under the influence of an externally applied homogeneous magnetic field.…”

Magnetorheological Fluids Based on Star-Shaped and Linear Polydimethylsiloxanes

“…The unique properties of MRFs and the ability to control them by means of external magnetic fields open up broad prospects for their practical application. The typical examples of devices based on MRFs are dampers [7][8][9][10][11][12][13], brakes [14][15][16] and clamping mechanisms [17][18][19].…”

Semi-active vibration control of building structure by Self Tuned Brain Emotional Learning Based Intelligent Controller

“…The plastic model of Bingham was the fundamental model of magneto-rheological fluid behavior. This Bingham model was created using the three constants Herschel-Bulkley fluid model, which considers the nonlinear flow of the rheological fluid [54].…”