INTEGRODIFFERENTIAL APPROACH TO MODELLING OF CONTINUAL INDUCTION HEATING OF NONMAGNETIC CYLINDRICAL BODIES

摘要

Continual induction heating, from the viewpoint of the mathematical and computer modelling, represents a relatively complicated problem described by two coupled partial differential equations for electromagnetic and temperature fields characterised by time-varying boundary conditions. Application of classical finite element method (FEM) requires remesh-ing of the definition area at every time level, which may significantly decelerate the process of solution, particularly calculation of the electromagnetic field. For linear problems of this kind the paper offers another approach based on the direct computation of spatial and temporal distributions of eddy currents and Joule losses in the heated body. The algorithm is illustrated by an example whose results are validated by a professional FEM-based code.