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Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 64, 2013 - Issue 2
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Original Articles

Heat Conduction Analysis in an Anisotropic Thin Film Irradiated by an Ultrafast Pulse Laser Heating

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Pages 132-152 | Received 20 Jan 2012, Accepted 12 Jan 2013, Published online: 02 May 2013
 

Abstract

The microscale heat conduction in an anisotropic thin-film subjected to an ultrafast laser heating is investigated. The coordinate transformation (CT) method has been employed to transform microscale heat conduction equations in an anisotropic thin-film to those of isotropic ones in the mapped domain. A comparison among three different models was made to investigate the effect of anisotropic thermal properties on the microscale heat conduction. Numerical results show that the CT method can be a good candidate to explore the microscale heat conduction mechanism in an anisotropic thin-film imposed by ultrafast pulse laser heating. The anisotropic heat conduction mechanism becomes more important when the thin film excited by multiple consecutive pulses with high power femtosecond laser. The multiple consecutive pulses with large separation time will spend much time to reach the thermal equilibrium state.

Acknowledgments

This work is supported by the National Science Council of Taiwan, through grant no. NSC 98-2221-E-035-067.

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