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Numerical Investigations on the Melted Bath Movements During Deep Penetration Laser Welding
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Abstract
By applying a high power laser beam on metallic surfaces for welding purpose, liquid and vapour flows induced by fusion and vaporization of the material, are governed by the mechanisms of deep penetration welding. The comprehension of the phenomena leading to the metallic liquid movements occurring in the melted bath is important for the control of welding product. In this paper, modeling investigations are carried out to explain and to simulate the melted bath dynamics by a combined 2D and 3D numerical study. Finite volumes method allows numerical solution of the governing differential equations describing the compressible vapour, while a multiphase model is used to deal with the liquid-gas interfaces interaction. The obtained results describe the movements of the liquid region in the presence of the environing air and the vapour generated inside the cavity ‘keyhole’ produced by the laser beam.
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References
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