Characterization of laser-induced local heating in a substrate

Yu, Peng1; Zeng, Yan2

2017-03

10.1016/j.ijheatmasstransfer.2016.10.068

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER   影响因子和分区

0017-9310

1879-2189

The laser-induced heating in a substrate is investigated in the present study. The non-dimensional form of the governing equation on energy conservation for the unsteady laser heating process indicates that the heating process can be characterized only by two dimensionless parameters, i.e. the dimensionless scanning velocity of the laser spot U and the dimensionless absorption depth A. A criterion, U << 1, is derived to scale down the heat transfer process from three dimensions to two dimensions, which is verified by the present numerical simulation. Another criterion, Lambda > 100, is also given to correlate the heat flux model and the heat absorption model by comparing the numerical results obtained by these two models. The numerical simulation reveals an interesting phenomenon, the lag between the times for laser center reaching a point and the corresponding point reaching the maximum temperature. The present study provides insight into the unsteady heat transfer process induced by laser heating. (C) 2016 Elsevier Ltd. All rights reserved.

Laser heating Heat assisted magnetic recording Optical absorption Head-disk interface Absorption coefficient

SCI ; EI

英语

第一 ; 通讯

NSFC[11542015]

Thermodynamics ; Engineering ; Mechanics

Thermodynamics ; Engineering, Mechanical ; Mechanics

WOS:000393015000084

PERGAMON-ELSEVIER SCIENCE LTD

20165003120013

Heat flux ; Heat transfer coefficients ; Laser heating ; Light absorption ; Numerical models

Heat Transfer:641.2 ; Light/Optics:741.1 ; Laser Applications:744.9 ; Mathematics:921

ENGINEERING

Web of Science

1.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, 1088 Xueyuan Blvd, Shenzhen 518055, Guangdong, Peoples R China
2.Nanyang Technol Univ, Sch Mech & Aerosp Engn, 50 Nanyang Ave, Singapore 639798, Singapore

Yu, Peng,Zeng, Yan. Characterization of laser-induced local heating in a substrate[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2017,106:989-996.

Yu, Peng,&Zeng, Yan.(2017).Characterization of laser-induced local heating in a substrate.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,106,989-996.

Yu, Peng,et al."Characterization of laser-induced local heating in a substrate".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 106(2017):989-996.