Numerical Investigation on Transient Conjugate Optical-Thermal Fields in Thin Films Irradiated by Moving Sources for Front Treatments

Abstract:

In this paper a numerical analysis on two-dimensional transient of the combined optical-thermal fields caused by a moving Gaussian laser source in a multilayer thin film structure on a glass substrate is carried out. The workpiece is considered semi-infinite along the motion direction and its optical and thermophysical properties are assumed temperature dependent. The COMSOL Multiphysics 3.4 code has been used to solve the combined thermal and electromagnetic problem. In this way, the optical field is considered locally one-dimensional and Maxwell equations are solved in order to evaluate the absorption in thin film. Results, in terms of transient temperature profiles and fields, are presented for different Peclet numbers and thin film thicknesses.

• Periodical: Defect and Diffusion Forum (Volumes 297-301)
• Pages: 1439-1444
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.297-301.1439
• Online since: April 2010
• Authors: Nicola Bianco, Oronzio Manca, Daniele Ricci
• Keywords: Laser Source, Moving Source, Radiative-Conductive Conjugate Problem, Thin Film

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