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Keyhole formation and collapse in plasma arc welding
Journal of Physics D: Applied Physics
A mathematical model is developed to describe the heat transfer and fluid flow in stationary keyhole plasma arc welding. Using the volume of fluid method, the processes of heating, melting, collapsing and subsequent solidifying in the molten pool are dynamically studied. The predicted results have been compared with the experimental weld and keyhole shape. Using the LaserStrobe video system, the captured images of the upper surface of the weld pool are used to verify the predicted transientdoi:10.1088/0022-3727/32/22/312 fatcat:b46kjgusifbqfihw2aa5cx5cy4