Abstract
The current study presents a magnetic numerical simulation of a plate-plate magnetorheometer using the finite-element method. In this study, a magnetorheometer with the least number of coil turns has been proposed and developed to obtain a high and consistent magnetic flux density (0.68 T at 3A) along the radius of the magnetorheological fluid (MRF) zone. The possibility of radial migration of MRF is eliminated by the lack of a magnetic flux gradient along the MRF zone’s radius. After comparing the temperature rise in the magnetorheometer caused by resistive and viscous heating in the simulation and the experiment, it has been found that the temperature rise has a negligible effect on the MR fluid. When we conducted studies in hybrid mode—that is, shear plus compression mode—we found that, under the same operating conditions, the shear stress was significantly higher compared to when we only used shear mode. In the combined shear plus compression mode, it has been observed that the effects of particle concentration and compression velocity have a significant impact on the shear stress value.
Published Version
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