Material phase change under extreme domain confinement in laser material interaction

Atomistic Modeling of Short Pulse Laser Ablation of Metals: Connections between Melting, Spallation, and Phase Explosion†

The mechanisms of short pulse laser interactions with a metal target are investigated in simulations performed with a model combining the molecular dynamics method with a continuum description of laser excitation, electron-phonon equilibration, and electron heat conduction. Three regimes of material response to laser irradiation are identified in simulations performed with a 1 ps laser pulse, w...

The role of inertial and spatial confinement in laser interaction with organic materials

Short-pulse laser irradiation of organic material performed under conditions of inertial or spatial confinement can result in laser damage or material ejection (ablation) at relatively low laser fluences. A computational investigation of the mechanisms of the efficient transformation of the deposited laser energy into the energy of material ejection is used in this work to discuss a number of p...

Hybrid atomistic-macroscale modeling of long-time phase change in nanosecond laser–material interaction

In this work, large-scale hybrid atomistic-macroscale simulation is performed to study the long-time material behavior in nanosecond laser–material interaction. Different phase change phenomena are studied, including solid–liquid interface speed, temperature, maximummelting depth, and ablation rate. Full solidification/epitaxial re-growth is observed within 60 ns for the laser fluence of 5 J/m....

Effect of Using Nano Encapsulated Phase Change Material on Thermal Performance of Micro Heat Sink

The aim of this paper is to enhance thermal performance of a microchannel heat sink by using nanoencapsulated phase change material (NEPCM) slurry as a cooling fluid instead of pure fluid. A threedimensional model of a circular channel using water slurry of NEPCM was developed. The results show a significant reduction in the mean fluid temperature along the channel and heat sink wall temperatu...

Material behavior under extreme domain constraint in laser-assisted surface nanostructuring