Abstract

A commercial CFD (computational fluid dynamics) code FLUENT was usedand modified to model an atmospheric pressure argon arc in a lowcross flow by solving the fully coupled conservation equations.Numerical experiments, with an arc current of 100 A to 200 A,an arcing distance of 3 mm to 6 mm, and a cross-flow velocityof 10 m/s to 30 m/s, were carried out. The modelling resultsshow that the arc tends to take the shortest path to the anode whendeflected by the cross flow; its anode attachment is fartherdownstream than the cathode one. Furthermore, due to the low inputgas flow imposed in this study, the effect of electromagnetic forceis important and it influences the crosscut shape of the arcsignificantly.

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