Theoretical Study of Transmissivity of Electromagnetic Wave in Magnetorheological Fluids

Abstract

The internal structure of magnetorheological fluid could change under external magnetic field, as well as its dielectric constant and magnetic conductance. A theoretical model of electromagnetic wave propagation in MRF was established and the basic formula of transmissivity was deduced. Theoretical simulation shows that the electromagnetic wave transmissivity decreases with the increasing of dielectric constant of magnetorheological fluid, and increases with the magnetic permeability. Theoretical analysis indicates that the change of its structure and dielectric magnetic properties of MR fluids is the main cause for the fact that the transmittance could be adjusted under external magnetic field.

Research on the vibration transmissibility of impedance modulating structure based on magnetorheological fluid

“…Based on the formation of clustering structures inside MR fluid clearly had an influence on ultrasonic propagation, Bramantya et al [23,24] proposed a qualitative analysis of these clustering structures by measuring properties of ultrasonic propagation. Wan et al [25] established a theoretical model of electromagnetic wave propagation in MR fluid, the results showed that the electromagnetic wave transmissivity decreased with the increase of dielectric constant of MR fluid, and increased with the increase of the magnetic permeability.…”