Magnetic interaction between two non-magnetic particles migrating in a conductive fluid under a strong magnetic field

A theoretical analysis of the interaction between two non-magnetic particles (Al2O3) migrating in a conductive fluid due to an imposed strong magnetic field is presented based on our recent work [1]. Two kinds of magnetic forces are induced: an attractive force due to the magnetisation and a repulsive force due to the conductive fluid flow around the Al2O3 particles. The forces are calculated with the consideration of the magnetic field effect on the particle migration and become significant with the increase of the magnetic flux density. A counteracting behavior with a critical particle size of the interparticle magnetic forces exists. In addition, the critical particle size as a function of the magnetic field gradient value is calculated. It renders a better understanding of some recent experimental results and provides a theoretical basis to control the particles assembly using strong magnetic fields for materials processing.

ISBN:978-3-936104-65-3

Jaar van publicatie:2009

Toegankelijkheid:Closed