Table of Contents
Magnetic Separation News
Volume 1 (1984), Issue 3, Pages 151-165

A New Mathematical Model for the Performance of Axial Magnetic Filters

Low Temperature Laboratory, Helsinki University of Technology, Espoo 15 02150 , Finland

Received 5 January 1984

Copyright © 1984 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A mathematical model to describe the macroscopic behaviour of an axial magnetic filter is developed. The model takes into account the long range of absorption forces. Partial mixing of the particles in the fluid is included by introducing the concept of “mixing length”. Behaviour of an axial filter under different conditions is numerically simulated. Experiments with colloidal ferrite particles indicate that for an axial filter composed of 12 μm steel wires with a packing factor of 4.8% the mixing length is of the order of 4 mm.