Numerical simulation for GMAW with a new model based on phase field model

In this paper, a numerical investigation about the metal transfer of GMAW is investigated based on the phase field model. Be different of most published work, we take the thermocapillary effect and mixture energy into the process of phase transfer and interface change which is different from volume of fluid (VOF) method. We discretize the whole model with a continuous finite element method and we also apply a penalty formulation to the continuity condition enhancing the stability of the pressure. Metal transfer of GMAW with constant and pulse current is computed as numerical examples which agrees well with the data of high-speed photography. The result shows that the computing process of the phase field model is stability and it has a higher precision in predicting the diameter of droplet.