Three-dimensional modeling of the plasma arc in arc welding
- Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, 1870 Miner Circle, Rolla, Missouri 65409 (United States)
- Department of Mechanical Engineering, University of Bridgeport, Bridgeport, Connecticut 06604 (United States)
Most previous three-dimensional modeling on gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW) focuses on the weld pool dynamics and assumes the two-dimensional axisymmetric Gaussian distributions for plasma arc pressure and heat flux. In this article, a three-dimensional plasma arc model is developed, and the distributions of velocity, pressure, temperature, current density, and magnetic field of the plasma arc are calculated by solving the conservation equations of mass, momentum, and energy, as well as part of the Maxwell's equations. This three-dimensional model can be used to study the nonaxisymmetric plasma arc caused by external perturbations such as an external magnetic field. It also provides more accurate boundary conditions when modeling the weld pool dynamics. The present work lays a foundation for true three-dimensional comprehensive modeling of GTAW and GMAW including the plasma arc, weld pool, and/or electrode.
- OSTI ID:
- 21185912
- Journal Information:
- Journal of Applied Physics, Vol. 104, Issue 10; Other Information: DOI: 10.1063/1.2998907; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
AXIAL SYMMETRY
BOUNDARY CONDITIONS
COMPUTERIZED SIMULATION
CURRENT DENSITY
ELECTRIC ARCS
ELECTRODES
ELECTRON TEMPERATURE
GAS TUNGSTEN-ARC WELDING
GAUSS FUNCTION
HEAT FLUX
MAGNETIC FIELDS
MATHEMATICAL MODELS
MAXWELL EQUATIONS
PERTURBATION THEORY
PLASMA
PLASMA PRESSURE
THREE-DIMENSIONAL CALCULATIONS
TWO-DIMENSIONAL CALCULATIONS
WELDED JOINTS