Open Access

ARTICLE

AN AXISYMMETRIC MODEL FOR SOLID-LIQUID-VAPOR PHASE CHANGE IN THIN METAL FILMS INDUCED BY AN ULTRASHORT LASER PULSE

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Department of Mechanical & Aerospace Engineering, University of Missouri, Columbia, MO 65201, USA

* Corresponding Author: Email:

Frontiers in Heat and Mass Transfer 2011, 2(1), 1-10. https://doi.org/10.5098/hmt.v2.1.3005

Abstract

An axisymmetric model for thermal transport in thin metal films irradiated by an ultrashort laser pulse was developed. The superheating phenomena including preheating, melting, vaporization and re-solidification were modeled and analyzed. Together with the energy balance, nucleation dynamics was employed iteratively to track the solid-liquid interface and the gas kinetics law was used iteratively to track the liquid-vapor interface. The numerical results showed that higher laser fluence and shorter pulse width lead to higher interfacial temperature, larger melting and ablation depths. A simplified 1-D model could overestimate temperature response and ablation depth due to the omission of radial heat conduction.

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