1.3 Scope of the present work
Due to the complex physical phenomena underlying the operation of the wire-arc system,
certain simplifications have to be made:
• Although the particle detachment, arcing, and therefore, arc heating are highly
oscillatory, all processes are assumed to occur at their average properties. In other
words, time dependence is not considered.
• The arc is modeled with a simplified semi-2D model, originally developed by
Lowke [ 38].
• Pictures of the arc are used to identify the shape of the arc. Pictures are then used to
prescribe arc info in the CFD solution of the fluid flow in the gun.
• The arc is solved independent of the cross-flow, except that the arc shape/length is
determined from the arc pictures.
• A simplified model of primary atomization is used to determine the size of primary
molten metal detachments from the wire-tips.
1.3 Scope of the present work
Due to the complex physical phenomena underlying the operation of the wire-arc system,
certain simplifications have to be made:
• Although the particle detachment, arcing, and therefore, arc heating are highly
oscillatory, all processes are assumed to occur at their average properties. In other
words, time dependence is not considered.
• The arc is modeled with a simplified semi-2D model, originally developed by
Lowke [ 38].
• Pictures of the arc are used to identify the shape of the arc. Pictures are then used to
prescribe arc info in the CFD solution of the fluid flow in the gun.
• The arc is solved independent of the cross-flow, except that the arc shape/length is
determined from the arc pictures.
• A simplified model of primary atomization is used to determine the size of primary
molten metal detachments from the wire-tips.
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