Repetitive laser pulse heating with a convective boundary condition at the surface


Yilbas B., Kalyon M.

JOURNAL OF PHYSICS D-APPLIED PHYSICS, vol.34, no.2, pp.222-231, 2001 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 34 Issue: 2
  • Publication Date: 2001
  • Doi Number: 10.1088/0022-3727/34/2/311
  • Title of Journal : JOURNAL OF PHYSICS D-APPLIED PHYSICS
  • Page Numbers: pp.222-231

Abstract

Repetitive laser pulses deposit sufficient energy to provide uniform-like heating at the surface of a substrate. This improves the surface properties of the substrate so treated. In the present study, an analytical solution for the temperature distribution due to repetitive laser pulse heating with a convective boundary condition at the surface is obtained. A Laplace transformation method is used when obtaining the analytical solution for the heat transfer equation. The effects of the pulse parameter (beta/gamma) and the Blot number (Bi) on the resulting temperature profiles for the possible attainment of a steady temperature at the surface during repetitive laser pulse heating is explored. The consecutive pulses with decreasing intensities are employed in the analysis while Bi is varied as 2 x 10(-4) less than or equal to Bi less than or equal to 0.2. It is found that it is unlikely that the temperature profile follows the pulse profile. The effect of Bi on the temperature profiles resulted from the repetitive pulses becoming significant when Bi greater than or equal to 10(-2).