期刊
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
卷 129, 期 -, 页码 1-6出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2018.09.046
关键词
CFD; k-epsilon turbulent model; Laminar flow; Lap joint fillet; Molten pool; Tandem GMAW
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning, Korea [2016R1D1A1B03935036]
- Ministry of Trade, Industry Energy, Korea [10052793, 10077517]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10052793, 10077517] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2016R1D1A1B03935036] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this research, a three-dimensional turbulent weld pool simulation technique of tandem gas tungsten arc welding (GMAW) in a lap joint fillet is described and compared to a conventional laminar flow simulation. Basically, four governing equations are adopted for continuity, namely, continuity, Navier-Stokes, energy, and the popular volume of fluid equations. According to the basic theory of an arc weld pool, all known characteristics such as the arc heat input, arc pressure, electromagnetic force, and Marangoni flow are applied to the analysis model as a body force term or boundary conditions. A conventional arc weld pool analysis usually adopts a laminar flow; however, its results have shown a weld bead shape that is quite different from an experiment of a tandem GMA lap joint fillet welding of an automotive steel sheet. Therefore, the authors suggest the use of a k-epsilon turbulent analysis model and show that its results coincide with the experiment results. (C) 2018 Elsevier Ltd. All rights reserved.
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