Computer simulation of three-dimensional heat transfer and fluid flow in gas metal arc (GMA) welding has been studied by considering the three driving forces for weld pool convection, that is the electromagnetic force, the buoyancy force, and the surface tension force at the weld pool surface. Molten surface deformation, particularly in the case of GMA welding, plays a significant part in the actual weld size and should be considered in order to accurately evaluate the weld pool convection. The size and profile of the weld pool are strongly influenced by the volume of molten electrode wire, impinging force of the arc plasma, and surface tension of molten metal. In the numerical simulation, difficulties associated with the irregular shape of the weld bead have been successfully overcome by adopting a boundary-filled coordinate system that eliminates the analytical complexity at the weld pool and bead surface boundary. The method used in this paper has the capacity to determine the weld bead and penetration profile by solving the surface equation and convection equations simultaneously.
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February 1994
This article was originally published in
Journal of Engineering for Industry
Research Papers
A Study on the Three-Dimensional Analysis of Heat and Fluid Flow in Gas Metal Arc Welding Using Boundary-Fitted Coordinates
J.-W. Kim,
J.-W. Kim
Department of Mechanical Engineering, Yeungnam University
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S.-J. Na
S.-J. Na
Department of Precision Engineering and Mechatronics, Korea Advanced Institute of Science and Technology, 373-1, Kusongdong, Yusonggu, Taejon, 305-701, Korea
Search for other works by this author on:
J.-W. Kim
Department of Mechanical Engineering, Yeungnam University
S.-J. Na
Department of Precision Engineering and Mechatronics, Korea Advanced Institute of Science and Technology, 373-1, Kusongdong, Yusonggu, Taejon, 305-701, Korea
J. Eng. Ind. Feb 1994, 116(1): 78-85
Published Online: February 1, 1994
Article history
Received:
September 1, 1991
Revised:
December 1, 1992
Online:
April 8, 2008
Citation
Kim, J., and Na, S. (February 1, 1994). "A Study on the Three-Dimensional Analysis of Heat and Fluid Flow in Gas Metal Arc Welding Using Boundary-Fitted Coordinates." ASME. J. Eng. Ind. February 1994; 116(1): 78–85. https://doi.org/10.1115/1.2901812
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