Time-Dependent Modeling of Droplet Detachment in GMAW Including Metal Vapor Diffusion

摘要

The most advanced models for gas–metal arc welding (GMAW) take into account either the time-dependent droplet formation using volume-of-fluid models or the diffusion of metal vapors evaporating from a fixed wire under steady-state conditions. In this paper, both aspects have been included in an axisymmetric 2-D time-dependent model for a GMAW torch operating in globular transfer mode in an Ar atmosphere at 160 A dc current. Numerical results have been compared with experimental high-speed-camera images.