Plume Formation during Laser Heating of a Solid Surface
作者单位：National Core Research Center for Hybrid Materials SolutionPusan National University Busan 609-735 South Korea National Core Research Center for Hybrid Materials SolutionPusan National University Busan 609-735 South Korea
会议名称：《第五届国际材料与热加工物理模拟及数值模拟学术会议》
会议日期：2007年
学科分类：08[工学] 0802[工学-机械工程] 080201[工学-机械制造及其自动化]
摘 要：A mathematical model of the dynamics of laser-produced heating, evaporation and plume formation is presented. The condensed material model includes conduction heat transfer as well as melting and evaporation phase changes. The localized heating and evaporation caused by focused laser radiation forms a plume of mixed vapor above the material surface. The beam is absorbed and refracted as it traverses the plume, thus modifying its power density on the surface. In this work, variations of heat transfer rate during laser heating and effects of a plume formed by vapor from an iron surface are studied using an axisymmetric mass, momentum and energy transport model. The simulation results quantify the heat transfer rate in the plasma plume, heat losses due to radiation, and variations of heat input into the material.