On A 2D Numerical Simulation of Laser Cladding by Powder Deposition

In this paper, a 2D transient numerical model for the convection-diffusion and phase change during the laser cladding process with powder deposition is presented. The governing equations are namely: continuity, momentum, energy and an equation to track the evolution of the free surface using a Volume-of-Fluid algorithm. The equations are discritized using finite volume numerical techniques. The surface tension is incorporated into the model as a body force using the CSF method. The effect of convection heat transfer at the top of the clad is considered; however, the influence of radiation is neglected due to the small effect on the temperature field. The proposed model is capable of predicting the final clad shape, height and depth.

کلیدواژه ها:

Laser cladding technology ، Enthalpy Method ، Liquid/Solid Volume fraction ، VOF Scheme