Dynamic simulation of metal transfer in GMAW, Part 1: Globular and spray transfer modes

The dynamic characteristics of the globular and spray metal transfer modes are simulated by adopting the Volume of Fluid (VOF) method. The electromagnetic force due to the welding current is included in the formulation of the VOF algorithm. The effect of the welding are is considered under the assumptions of a uniform and linear current density on the pendant drop surface. The free surface profiles, pressure and velocity distributions within the drop are calculated numerically. It is found that axial flow and radial pinch force promote drop detachment, and the taper of the elongated molten drop in the spray mode is maintained by the electromagnetic force. The current density distribution on the drop surface has significant effects on the molten drop profile, detaching drop volume and taper formation at the molten tip. Predicted results are in reasonably good agreement with the experimental data.
Publisher
Amer Welding Soc
Issue Date
1998-01
Language
ENG
Keywords

ARC

Citation

WELDING JOURNAL, v.77, no.1, pp.38S - 44S

ISSN
0043-2296
URI
http://hdl.handle.net/10203/73235
Appears in Collection
ME-Journal Papers(저널논문)
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