Molecular dynamics Simulation of Heat Transfer and Phase Change During Laser Material Interaction

摘要

In this work, heat transfer and phase change of an argon crystal irradiated by a picosec- ond pulsed laser are investigated using molecular dynamics simulations. The result re- veals n clear interface when phase change occurs, but a transition region where the crystal structure and the liquid structure co-exist. Superheating is observed during the melting and vaporizing processes. The solid-liquid interface is found to move with a velocity of hundreds of meters per second, and the vapor is ejected from the surface with a vapor front velocity of hundreds of meters per second.