Modelling of phase changes in thin metal film subjected to ultrafast laser heating using the two-temperature model

2016 ◽  
pp. 367-370 ◽  
Author(s):  
E Majchrzak ◽  
J Dziatkiewicz
Keyword(s):  
Laser Heating ◽  
Metal Film ◽  
Thin Metal Film ◽  
Ultrafast Laser ◽  
Phase Changes ◽  
Thin Metal ◽  
Temperature Model ◽  
Two Temperature

scholarly journals Numerical Modeling of Melting Process of Thin Metal Films Subjected to the Short Laser Pulse

2012 ◽  
Vol 12 (4) ◽  
pp. 105-108 ◽  
Author(s):  
E. Majchrzak ◽  
J. Dziatkiewicz
Keyword(s):  
Short Pulse ◽  
Melting Process ◽  
Thin Metal Film ◽  
Thin Metal ◽  
Spatial Evolution ◽  
Temperature Model ◽  
Short Pulse Laser ◽  
Temporal And Spatial ◽  
Pulse Laser Heating ◽  
Two Temperature

Abstract Thin metal film subjected to a short-pulse laser heating is considered. The parabolic two-temperature model describing the temporal and spatial evolution of the lattice and electrons temperatures is discussed and the melting process of thin layer is taken into account. At the stage of numerical computations the finite difference method is used. In the final part of the paper the examples of computations are shown.

Parabolic and Hyperbolic Two-Temperature Models of Microscopic Heat Transfer. Comparison of Numerical Solutions

2012 ◽  
Vol 706-709 ◽  
pp. 1454-1459 ◽  
Author(s):  
Ewa Majchrzak
Keyword(s):  
Heat Transfer ◽  
Metal Film ◽  
Numerical Solutions ◽  
Thin Metal Film ◽  
Ultrafast Laser ◽  
Microscale Heat Transfer ◽  
The Finite Difference Method ◽  
Energy Equations ◽  
Transfer Problems ◽  
Two Temperature

The paper deals with the microscale heat transfer problems. In particular, the ultrafast laser heating of thin metal film is considered. The problem is described by so-called two-temperature models consisting of two equations concerning the electron and lattice temperatures. Energy equations are supplemented by two additional ones determining the dependencies between electrons (phonons) heat flux and electrons (phonons) temperature gradient. According to the form of above dependencies one obtains the parabolic or hyperbolic heat transfer models discussed here. The problems have been solved using the finite difference method. In the final part of the paper the results of computations and the comparison of solutions obtained are presented.

scholarly journals Second-Order Dual Phase Lag Equation. Modeling of Melting and Resolidification of Thin Metal Film Subjected to a Laser Pulse

Mathematics ◽  
2020 ◽  
Vol 8 (6) ◽  
pp. 999 ◽  
Author(s):  
Ewa Majchrzak ◽  
Bohdan Mochnacki
Keyword(s):  
Laser Pulse ◽  
Latent Heat ◽  
Metal Film ◽  
Thin Metal Film ◽  
Second Order ◽  
Phase Changes ◽  
Thin Metal ◽  
Phase Lag ◽  
Dual Phase ◽  
Numerical Computations

The process of partial melting and resolidification of a thin metal film subjected to a high-power laser beam is considered. The mathematical model of the process is based on the second-order dual phase lag equation (DPLE). Until now, this equation has not been used for the modeling of phase changes associated with heating and cooling of thin metal films and the considerations regarding this issue are the most important part of the article. In the basic energy equation, the internal heat sources associated with the laser action and the evolution of phase change latent heat are taken into account. Thermal processes in the domain of pure metal (chromium) are analyzed and it is assumed that the evolution of latent heat occurs at a certain interval of temperature to which the solidification point was conventionally extended. This approach allows one to introduce the continuous function corresponding to the volumetric fraction of solid or liquid state at the neighborhood of the point considered, which significantly simplifies the phase changes modeling. At the stage of numerical computations, the authorial program based on the implicit scheme of the finite difference method (FDM) was used. In the final part of the paper, the examples of numerical computations (including the results of simulations for different laser intensities and different characteristic times of laser pulse) are presented and the conclusions are formulated.

scholarly journals Rarefaction after fast laser heating of a thin metal film on a glass mount

2017 ◽  
Author(s):  
N. A. Inogamov ◽  
V. A. Khokhov ◽  
Y. V. Petrov ◽  
V. V. Zhakhovsky ◽  
K. P. Migdal ◽  
...  
Keyword(s):  
Laser Heating ◽  
Metal Film ◽  
Thin Metal Film ◽  
Thin Metal

Self-Ordered Vicinal-Surface-Like Nanosteps at the Thin Metal-Film/Substrate Interface

2012 ◽  
Vol 116 (22) ◽  
pp. 12149-12155 ◽  
Author(s):  
Shirly Borukhin ◽  
Cecile Saguy ◽  
Maria Koifman ◽  
Boaz Pokroy
Keyword(s):  
Metal Film ◽  
Thin Metal Film ◽  
Thin Metal ◽  
Vicinal Surface ◽  
Substrate Interface ◽  
Film Substrate
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