A Comprehensive Model on the Transport Phenomena During Gas Metal Arc Welding Process
A comprehensive mathematical model and the associated numerical technique have been developed to simulate the coupled, interactive transport phenomena between the electrode (droplets), the are plasma, and the workpiece (weld pool) during a stationary axisymmetric gas metal are welding process. The simulation involves are plasma generation, electrode melting, droplet formation, detachment, transfer, and impingement onto the workpiece, and weld pool dynamics. During transfer from the tip of the electrode to the workpiece, the droplet subjects to gravity, electromagnetic force, surface tension, and arc plasma drag force. Transient temperature and velocity distributions of the arc plasma, shapes of the electrode, droplet, and weld pool, and heat transfer and fluid flow in the weld pool are all calculated in a single, unified model. The predicted solidified weld bead shape compares favourably with the experimental result.
F. L. Zhu et al., "A Comprehensive Model on the Transport Phenomena During Gas Metal Arc Welding Process," Progress in Computational Fluid Dynamics, Inderscience, Jan 2004.
Mechanical and Aerospace Engineering
Keywords and Phrases
Arc Plasma; Free Surface; Gas Metal Are Welding; Weld Pool Flow
Article - Journal
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