|About this Abstract
||Liquid Metal Processing & Casting Conference (LMPC 2019)
||Liquid Metal Processing & Casting
||Investigations on Collective Motion of Cathode Spots in the VAR Process
||Abdellah Kharicha, Ebrahim Karimi Sibaki, Menghuai Wu, Andreas Ludwig
|On-Site Speaker (Planned)
The behaviour of the arc in the VAR process can be considered as the sum of the collective motion of the spots. The spots moves discreetly at high speed, but based on experimental observation the arc motion is continuous and much slower. The purpose of the present paper is to investigate numerically the movement of the many cathode spots in interaction through their self-magnetic field. The movement of the spots is assumed to be controlled by a combined stochastic-deterministic law using a retrograde Lorentz force. It is shown that the cathode spots randomly nucleate near the centre and then move towards the edge of the electrode. Many spots move collectively in the form of alignments of 3 to 7 spots. For large applied currents, the spots form a cloud that expands periodically in an anisotropic way.
||Definite: At-meeting proceedings