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A finite difference method for studying thermal deformation in a thin film exposed to ultrashort-pulsed lasers

2006; Elsevier BV; Volume: 49; Issue: 15-16 Linguagem: Inglês

10.1016/j.ijheatmasstransfer.2006.01.013

1879-2189

Haojie Wang, Weizhong Dai, Raja Nassar, Roderick Melnik,

High-pressure geophysics and materials

Ultrashort-pulsed lasers have been attracting worldwide interest in science and engineering. Studying the thermal deformation induced by ultrashort-pulsed lasers is important for preventing thermal damage. This article presents a finite difference method for studying thermal deformation in a thin film exposed to ultrashort-pulsed lasers. The method is obtained based on the parabolic two-step model. It accounts for the coupling effect between lattice temperature and strain rate, as well as for the hot-electron-blast effect in momentum transfer. The method allows us to avoid non-physical oscillations in the solution as demonstrated by numerical examples.