RESEARCH PAPERS: Heat Transfer in Manufacturing

Nonaxisymmetric Convection in Stationary Gas Tungsten Arc Weld Pools

[+] Author and Article Information
Y. Joshi

Department of Mechanical Engineering, University of Maryland, College Park, MD 20742

P. Dutta

Department of Mechanical Engineering, Indian Institute of Science, Bangalore, India

P. E. Schupp, D. Espinosa

Department of Mechanical Engineering, Naval Postgraduate School, Monterey, CA 93943

J. Heat Transfer 119(1), 164-172 (Feb 01, 1997) (9 pages) doi:10.1115/1.2824082 History: Received February 06, 1996; Revised September 30, 1996; Online December 05, 2007


Observations of surface flow patterns of steel and aluminum GTAW pools have been made using a pulsed laser visualization system. The weld pool convection is found to be three-dimensional, with the azimuthal circulation depending on the location of the clamp with respect to the torch. Oscillation of steel pools and undulating motion in aluminum weld pools are also observed even with steady process parameters. Current axisymmetric numerical models are unable to explain such phenomena. A three-dimensional computational study is carried out in this study to explain the rotational flow in aluminum weld pools.

Copyright © 1997 by The American Society of Mechanical Engineers
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