Numerical modeling of the coupled electromagnetic and thermal fields in the controlled solidification process

Author： Nagy Stefan Leuca Teodor Mich Claudiu

ISSN： 0332-1649

Source： COMPEL: Int J for Computation and Maths. in Electrical and Electronic Eng., Vol.29, Iss.5, 2010-09, pp. : 1266-1275

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Abstract

Purpose ‐ The purpose of this paper is to present the numerical modeling of the coupled electromagnetic and thermal fields for the controlled solidification process of non-ferrous alloys. Design/methodology/approach ‐ The paper uses a numerical modeling program for the controlled solidification process modeling to allow visualization of the model and collection of the data. The data are then processed using spreadsheets in order to obtain graphic representations for the variations of the measured values. Findings ‐ The probes cast using this method will have a uniform structure, without micro-fissures. If the solid part growth of the molten is controlled, the process can be stopped that creates solidification centers, thus the material structure will be homogenous. A solution for this matter is given by the control of the solidification structure using forced heating of the liquid part with eddy currents and forced cooling of the solid part. The evolution of the area with eddy currents and the cooled one controls the phase transformation. Originality/value ‐ It is presented here a computation method for the thermal field diffusion and the results of the numerical modelling of the thermal and electromagnetic fields during casting process with controlled solidification layer for the non-ferrous alloys.