Study on Fluid Flow and Heat Transfer of Moving GTA Weld Pool in the Longitudinal Magnetic Field

Compared with general Gas Tungsten Arc Welding (GTAW), substantial change happens to liquid metal in external longitudinal magnetic field GTA weld pool. In the paper, mathematical models of fluid flow and heat transfer of external longitudinal magnetic field moving GTAW three-dimensional weld pool are established. Using the multi-coupled analysis function of ANSYS, distributions of current density and magnetic field as well as fluid flow and heat transfer of three-dimensional moving weld pool are systematically studied to understand and reveal the effect of external longitudinal magnetic field on liquid metal in moving GTA weld pool and supply basis for the application of external longitudinal magnetic field welding technique.

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