The metal transfer in GMAW is a complex two phase flow involving free surface, thermal interactions, and interaction between various forces. Since it affects the weld quality and productivity, several attempts were made to figure out the mechanism of metal transfer through theoretical modeling and experimentation. In this study, the VOF(Volume of Fluid) method is proposed to predict the dynamic behavior of metal transfer of short-circuit mode. The time to break up is calculated from contact of molten pool. Shape, velocity, current density, voltage, and pressure profile are calculated. From shape and profiles of current density, electromagnetic force can be calculated. Also effect of various welding conditions on short-circuit transfer is explained. The results of the analysis show good agreements with the other analyses.
