Abstract
Laser short-pulse heating of metallic surfaces is involved with nonequilibrium energy transport in the region irradiated by a laser beam. In this case, the Fourier heating model fails to predict correct temperature rise in this region. Moreover, for completeness of analysis, the thermomechanical coupling needs to be incorporated in the governing equations. In the present study, electron kinetic theory approach is introduced to model the heating process and thermomechanical coupling is formulated and accommodated in the energy transport equation. Temperature and stress fields are computed numerically for silver. It is found that electron temperature well in excess of lattice site temperature occurs in the surface vicinity of the substrate material. Although lattice site temperature rise is low (∼170°C), stress levels as high 3 × 108 Pa are computed in the region heated by a laser beam. The thermal expansion of the surface at the irradiated spot center reaches 0.5 nm after 4 ns of the heating period.
| Original language | English |
|---|---|
| Pages (from-to) | 623-646 |
| Number of pages | 24 |
| Journal | Numerical Heat Transfer; Part A: Applications |
| Volume | 42 |
| Issue number | 6 |
| DOIs | |
| State | Published - 1 Nov 2002 |
Bibliographical note
Funding Information:Receievd 23 Mrh c2a0;0acc1eptde23 February 202. 0 The authors acknowledge the support of King Fhd Unaievriystof Petroleum and Minerl,asDhah-rn,aSudiaAra,bfor thiisawork. Address correspondene tocB. S. Yilbas, King Fhd UnaievrsyioftPetroleum and Minelr, sDeapart-ment of Mechanical Engieenrin, POgBx1o3,9Dh1an3h61, rS1a2uadi Arabia. E-mai: lbs@yilbas kfupm.edu.sa
ASJC Scopus subject areas
- Numerical Analysis
- Condensed Matter Physics