EFFECT OF CARRIER FLUID VISCOSITY AND PARTICLE CONCENTRATION ON STABILITY OF MAGNETORHEOLOGICAL FLUID

被引：0

作者：

Prajapati, Hiren ^{[1
]}

Lakdawala, Absar ^{[1
]}

机构：

[1] Department of Mechanical Engineering, Institute of Technology, Nirma University, Ahmedabad

来源：

Multiphase Science and Technology | 2024年 / 36卷 / 04期

关键词：

induction method; magnetorheological fluids; multiphase; sedimentation index; settling;

D O I：

10.1615/MultScienTechn.2024054255

中图分类号：

学科分类号：

摘要：

Magnetorheological fluids (MRFs) are multiphase smart fluids comprising micro-sized magnetic par- ticles suspended in nonmagnetic carrier fluid. Dispersed particles get polarized and form chains along the magnetic field lines when MRF is exposed to an external magnetic field. It further increases the apparent viscosity. Such rheological characteristics encourage its use in hydro-mechanical systems such as damper, clutch, and brake. These systems become semi-active by using MRF instead of New- tonian oils. The biggest hurdle in rheological response is the sedimentation of particles in MRF. Due to the large density difference between carrier fluid and magnetic particles, the dispersed phase settles and separates from carrier fluid. Numerous studies have been reported on the application of differ- ent additives to reduce sedimentation. In the present work, MRF sedimentation is measured using an induction-based setup. The sedimentation index, which is used for quantification of settling, is obtained from the experimental particle settling data. Further, the experimental sedimentation index is used to study the effect of dispersed phase concentration on the stability of magnetorheological fluid. The concentration of the dispersed phase varies from 10 to 25 vol%. It is inferred that increase in the concentration of the dispersion phase increases the stability of MRF. © 2024 by Begell House, Inc.

引用

页码：47 / 55

页数：8

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