Electrostatic and hydrodynamics effects in a sedimented magnetorheological suspension.

ABSTRACT Title of Document: ADAPTIVE MAGNETORHEOLOGICAL SEAT SUSPENSION FOR SHOCK MITIGATION

Title of Document: ADAPTIVE MAGNETORHEOLOGICAL SEAT SUSPENSION FOR SHOCK MITIGATION. Harinder Jit Singh Doctor of Philosophy, 2014 Directed By: Norman M. Wereley Minta Martin Professor and Chair Department of Aerospace Engineering This research focuses on theoretical and experimental analysis of an adaptive seat suspension employing magnetorheological energy absorber with the objective of minim...

CFD Investigation of Hydrodynamics in an Industrial Suspension Polymerization Mixing Reactor

Instabilities of a pressure-driven flow of magnetorheological fluids

In this work, we studied a pressure-driven flow of a magnetorheological suspension through a cylindrical tube in the presence of a non-uniform magnetic field perpendicular to the tube and varying along its axis. The flow was realized with the help of a commercial capillary rheometer in a controlled-velocity mode. Experimental pressure-flow rate curves exhibited a local minimum, and flow instabi...

Hydrodynamic shocks in microroller suspensions

We combine experiments, large scale simulations and continuum models to study the emergence of coherent structures in a suspension of magnetically driven microrollers sedimented near a floor. Collective hydrodynamic effects are predominant in this system, leading to strong density-velocity coupling. We characterize a uniform suspension and show that density waves propagate freely in all directi...

Dynamics of an Autoparametric Pendulum-Like System with a Nonlinear Semiactive Suspension

This paper presents vibration analysis of an autoparametric pendulum-like mechanism subjected to harmonic excitation. To improve dynamics and control motions, a new suspension composed of a semiactive magnetorheological damper and a nonlinear spring is applied. The influence of essential parameters such as the nonlinear damping or stiffness on vibration, near the main parametric resonance regio...