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Publikācija: Modeling of Surface Structure Formation after Laser Irradiation

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Nosaukums oriģinālvalodā Modeling of Surface Structure Formation after Laser Irradiation
Pētniecības nozare 1. Dabaszinātnes
Pētniecības apakšnozare 1.3. Fizika un astronomija
Autori J. Kaupužs
Sh.E. Guseinov
J. Rimshans
Artūrs Medvids
Atslēgas vārdi Stefan problem, Greens functions, laser irradiation, surface structure, diferential equations, Runge-Kutta method, Euler lagrange equation
Anotācija The Stefan problem in a semi-infinite media under laser irradiation is consideres. It is related to the melting and solodification processes, resulting in certain surface structure after the solidification. A simple model, as well as a more sophisticated one is proposed to describe this process. The latter model allows us to calsulate the surface profile by solving a system of two nonlinear differential equations, if the shape of the solid-liquid interface is known. It has to be found as a solution of two-phases Stefan problem. The results of example calculations by the fourth-order Runge-Kutte method are presented, asuming that the solid-liquid interface has a parabolic shape. The calculated crossection of the surface structure shows a characteristic cone in the cernet, in agreement with experimental observations.
Atsauce Kaupužs, J., Guseinov, S., Rimshans, J., Medvids, A. Modeling of Surface Structure Formation after Laser Irradiation. No: Proceedings of the 8th WSEAS International Conference on Heat and Mass Transfer (HMT'11), Meksika, Puerto Morelos, 11.-14. janvāris, 2011. Puerto Morelos: 2011, 49.-56.lpp.
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ID 12324