Abstract :

Magnetorheological Fluids Have The Unique Ability To Change Their Apparent Viscosity And Yield Stresses On Application Of An External Magnetic Field. Due To Their Smart Property These Fluids Are Gaining Extensive Usage In Modern Equipments. This Report Explains The Fundamentals Of MR Fluid, Their Basic Structure And Behavior. To Understand The Physics Of MR Fluid, The Analysis Is Divided Into Two Parts: Macroscopic And Microscopic Analysis. The Microscopic Analysis Involves The Molecular Simulation Dynamics On MR Fluid Under The Application Of Applied Magnetic Field. The Particle Motion Is Basically Governed By Magnetic, Hydrodynamic And Repulsive Interaction. Fluid Particle Interactions Are Accounted Via Stokes Drag While Interparticle Interactions Are Modeled Through Approximate Hard-sphere Rejection /hard-wall Rejections, Respectively. The Time Evolution Is Considered To Be Magnetically Quasi-static And The New Position Of The Particle Is Recomputed At Each Instant In Time By Solving The Governing Differential Equations Using R K 4th Order Method. Further, The Dynamic Yield Stress Is Determined Using Microscopic Shear Stress Tensor Equation And A Number Of Observations Such As Dependence Of Dynamic Yield Stress And Response Time-scales On Particle Size, Concentration, Applied Magnetic Field And Base Viscosity Which Are Crucial In Predicting The Behavior Of MR Fluids, Is Studied. The Macroscopic Analysis Involved The Viscosity Measurement On Viscometer And Rheometer And The Modeling Of Viscosity With Shear Rate And Temperature Without Application Of Applied Magnetic Field. An Experiment Is Performed On MR Brake To Analyze The Behavior Of MR Fluid Under The Application Of Applied Magnetic Field.

Published:

19-12-2025

Issue:

Vol. 25 No. 12 (2025)

Page Nos:

393-404

Section:

Articles

License:

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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