Uncertainty Analysis of Solid Liquid Vapor Phase Change of a Metal Particle Subject to Nanosecond Laser Heating

Abstract

The effects of the uncertainties of various parameters, including the laser fluence, diameter of metal powder particles, laser pulse width, and the initial temperature of metal particles on solidliquidvapor phase change processes of metal particles under nanosecond laser heating are investigated in this paper. A systematic approach of simulating the phase change with uncertain parameters is presented and a samplebased stochastic model is established in order to investigate the influence of different uncertain parameters on the maximum surface temperature of metal particles, the maximum solidliquid interface location, maximum liquidvapor interface location, maximum saturation temperature, and maximum recoil pressure and the time needed to reach the maximum solidliquid interface location. The results show that the mean value and standard deviation of the laser fluence have dominant effects on all output parameters.