Title :
Time-Dependent Modeling of Droplet Detachment in GMAW Including Metal Vapor Diffusion
Author :
Boselli, Marco ; Colombo, Vittorio ; Ghedini, Emanuele ; Sanibondi, Paolo
Author_Institution :
Dept. of Mech. Eng. (DIEM), Univ. di Bologna, Bologna, Italy
Abstract :
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.
Keywords :
arc welding; argon; drops; plasma flow; plasma simulation; plasma torches; plasma transport processes; Ar; Ar atmosphere; GMAW torch; axisymmetric 2D time-dependent modeling; current 160 A; dc current; droplet detachment; gas-metal arc welding; globular transfer mode; high-speed-camera images; metal vapor diffusion; time-dependent droplet formation; volume-of-fluid model; Atmospheric modeling; Heating; Metals; Numerical models; Plasmas; Welding; Wires; Computational modeling; plasma applications; plasma diagnostics; plasma welding;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2011.2149544
