Mathematical Modelling of Heat Transfer of Welding Arc (Part 1)(WELDING PHYSICS, PROCESSES AND INSTRUMENTS)

概要

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A mathematical formulation has been developed to represent the electromagnetic force field, the velocity field and the temperature field in DC welding arc. The formulation utilzed an engineering approach in which the plasma was regarded as a continuum of known electrical properties, the behavior of which could be represented by using the MHD equations and the convective heat balance relationships including the concept of turbulent nature of flow. The calculations proceeded by specifying the arc dimensions and the arc current and then governning equations were solved numerically, ultimately yielding information on the velocity profiles and the temperature profiles within the system under the various conditions of electrode shapes. The theoretical predictions of the temperature field and heat transfer characteristics are compared and discussed with experimental results.
大阪大学の論文