Numerical Modeling of GMAW Arc
Abstract
A comprehensive model has been developed to simulate the transient, coupled transport phenomena occurring during a gas metal arc welding process. This includes the arc plasma; melting of the electrode; droplet formation, detachment, transfer, and impingement onto the workpiece; and weld pool fluid flow and dynamics. The fluid flow and heat transfer in both the arc and the metal were simulated and coupled through the boundary conditions at the arc-metal interface at each time step. The detached droplet in the arc and the deformed weld pool surface were found to cause significant changes in the distributions of arc temperature and arc pressure, which are usually assumed to have Gaussian distributions at the workpiece surface. The comprehensive model could provide more realistic boundary conditions to calculate the heat transfer and fluid flow both in the plasma and the metal. The predicted arc plasma distribution, droplet flight trajectory, droplet acceleration and final weld bead shape compared favorably with the published experimental results. This paper was to present the heat transfer and fluid flow in the arc plasma.
Recommended Citation
J. Hu et al., "Numerical Modeling of GMAW Arc," Advances in Computer, Information, and Systems Sciences, and Engineering, Springer Verlag, Jan 2006.
The definitive version is available at https://doi.org/10.1007/1-4020-5261-8_12
Meeting Name
IETA 2005, TeNe 2005, EIAI 2005
Department(s)
Mechanical and Aerospace Engineering
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2006 Springer Verlag, All rights reserved.
Publication Date
01 Jan 2006
