Abstract
This paper presents an analytical solution of transient heat conduction in a thin film subjected to symmetrical laser heating, employing the dual-phase lag model. Laser heating is modeled as an internal heat source. The analytical solution is derived using the finite integral transforms and the method of variation of parameters. The solutions for different time characteristics of heat sources capacity (instantaneous, rectangular, light, and Gaussian) are discussed. The effect of the control parameter
B
=
τ
T
/2
r
q
on the temperature profiles is examined in details.