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Lateral forces on a magnet falling in a conducting pipe

Content Provider	Hyper Articles en Ligne (HAL)
Author	Dufour, Stéphane Vinsard, Gérard Brancher, J. -P
Abstract	Purpose — The purpose of this paper is to investigate the lateral forces during the fall of a magnet in a conducting pipe, when the direction of magnetization of the magnet is fixed. If the direction of magnetization is not parallel to the axis of the pipe, lateral forces occur and a decentration of the magnet happens.Design/methodology/approach — The problem is studied numerically, with a T − h 3D FE formulation well-suited for the problem. Computational results are compared with experimental results.Findings — The physical model is given and the main force coefficients analyzed. The lateral forces and the decentration phenomenon are studied as a function of the main parameters (thickness and radius of the pipe).Originality/value — The direction of magnetization is a key parameter to analyze the dynamics of a magnet motion inside a conducting pipe, when the radii of the pipe and the magnet are not so close. This analysis with a fixed direction of magnetization allows to quantify the lateral forces and the decentration, and is a first step to understand the complete motion which includes the rotation which can be linked to the decentration.
Ending Page	1636
Page Count	12
Starting Page	1625
File Format	PDF
ISSN	03321649
DOI	10.1108/03321641211267038
Journal	COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering
Issue Number	6
Volume Number	31
Language	English
Publisher	Emerald
Publisher Date	2012-01-01
Access Restriction	Open
Subject Keyword	Velocity Finite Element Eddy currents Magnets spi Engineering Sciences [physics] Electromagnetism Reactive fluid environment
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Computational Theory and Mathematics Electrical and Electronic Engineering Computer Science Applications

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