Peng-Sheng Wei
National Sun Yat-Sen University, Taiwan
Title: Scaling of thermocapillary molten pool shape during laser melting
Biography
Biography: Peng-Sheng Wei
Abstract
The molten pool or fusion zone shape and transport variables affected by thermocapillary force during melting or welding with a distributed energy beam can be scaled as functions of specified working variables. pool. The scaling analysis considers different thicknesses of thermal and momentum boundary layers in different regions in the molten pool. Incident flux is irradiated in the central region of the free surface. The driving force is thermocapillary force balanced by shear stresses in the shear layer below the free surface. The scaling results are found to agree well with experimental data and numerical computations for different Prandtl numbers, as shown in Figure 1. Figures 2 and 3 show that scale analysis of the fusion zone depth and width agree well with numerical computations.