Finite difference model of short-pulse laser interactions with thin metal film

Ewa Majchrzak¹, Bohdan Mochnacki², Józef S. Suchy³

¹Silesian University of Technology, Gliwice, Poland.
²Czestochowa University of Technology, Czestochowa, Poland.
³AGH, University of Science and Technology, Kraków, Poland.

DOI:

https://doi.org/10.7494/cmms.2009.2.0248

Abstract:

Thermal processes in a thin metal film subjected to a short-pulse laser heating are considered. The heat transfer proceeding in domain analyzed (microscale heat transfer) is described by means of the dual-phase-lag-model (DPLM) and the mathematical description of the process bases on the equation in which the relaxation time and thermalization time appear. The pulse laser action is taken into account by an additional term in energy equation corresponding to internal heat source, at the same time along the boundaries limiting a system the non-flux conditions are assumed. On a stage of numerical modelling a three level implicit finite difference scheme has been developed. A geometry of thin film allows to consider a 1D task, and then a solution of only one three-diagonal linear system of equations corresponds to transition from time t to t +Δt. In this place the Thomas algorithm has been used. In a final part of paper the examples of computations are shown.

Cite as:

Majchrzak, E., Mochnacki, B., Suchy, J., (2009). Finite difference model of short-pulse laser interactions with thin metal film. Computer Methods in Materials Science, 9(2), 316 – 321. https://doi.org/10.7494/cmms.2009.2.0248

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