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EDDY CURRENT AND TEMPERATURE SIMULATION IN THIN MOVING METAL STRIPS
Author(s) -
CONRATHS H.J.
Publication year - 1996
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/(sici)1097-0207(19960115)39:1<141::aid-nme843>3.0.co;2-k
Subject(s) - eddy current , discretization , galerkin method , mechanics , magnetic potential , electromagnetic field , finite element method , vector potential , strips , scalar potential , boundary value problem , scalar (mathematics) , magnetic field , physics , mathematical analysis , classical mechanics , mathematics , geometry , thermodynamics , algorithm , quantum mechanics
Abstract The paper presents a special finite element formulation for the computer simulation of an inductive heating device for thin moving metal strips. The calculation includes both the electromagnetic field and the temperature distribution resulting from the losses of the induced currents. The electromagnetic field is described by an electric vector potential and a magnetic scalar potential, the induced eddy currents are represented by a special boundary condition for the magnetic scalar potential along the surface of the current‐carrying strip. This avoids the necessity to discretize the thin secondary region. The thermal model includes the movement of the strip as well as convection and radiation as its surfaces. The field equations are discretized using the Galerkin variant of the Method of Weighted Residuals. The mutually coupled electromagnetic and temperature fields are then calculated using an iterative, staggered solution scheme. Comparisons between calculated and measured temperature profiles show the validity of the presented approach.