Interparticle force measurements on ferromagnetic steel balls
作者:
Chak Tan,
T. B. Jones,
期刊:
Journal of Applied Physics
(AIP Available online 1993)
卷期:
Volume 73,
issue 8
页码: 3593-3598
ISSN:0021-8979
年代: 1993
DOI:10.1063/1.352916
出版商: AIP
数据来源: AIP
摘要:
Interparticle force measurements have been performed upon various configurations of linear chains and planar layers of chrome steel balls immersed in a steady uniform applied magnetic field. These force measurements, made for particles in contact and at various separations, reveal that the attractive forces are enhanced in the case of particle chains parallel to the applied magnetic field and slightly decreased in the case of perpendicular layers. The magnetic saturation exhibited by the steel balls has only a modest effect on the force. Experimental data obtained for two‐particle chains correlate reasonably well to force calculations based upon a linear multipolar expansion using a relative particle permeability value of &mgr;r=100. It is also found that data obtained with longer linear chains as well as with planar particle arrays do not deviate drastically from the predictions of the two‐sphere problem.
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