The equilibrium heating ceases in the surface vicinity of the solid as the
laser heating pulse length reduces to sub-nanoseconds. In this case, one-eq
uation model overestimates the temperature rise in the surface vicinity. In
order to account for the nan-equilibrium heating, the present study is car
ried out. The electron kinetic theory approach is considered when modeling
the laser heating process. The convective boundary condition and the moving
heat source are taken into account in the analysis. The governing equation
s of heat transfer are non-dimensionalized with the appropriate parameters.
The electron kinetic theory predictions are compared with the two-and one-
equation model findings. It is found that the electron kinetic theory predi
ctions agree well with the two-equation model findings and the one-equation
model overestimates the temperature rise in the substrate. The Blot (Bi) n
umber and the laser scanning speed have a coupling effect on the heat trans
fer mechanism. In this case, the maximum temperature at the surface reduces
considerably by increasing the scanning speed and Bi. (C) 2001 Published b
y Elsevier Science B.V.