Two-dimensional Dual-Phase-Lag thermal behavior in single-/multi-layer structures using CESE method

The Space–Time Conservation Element and Solution Element (CESE) method is used to simulate the propagation of Dual-Phase-Lag (DPL) laser-pulsed thermal waves through single-layer and multi-layer 2D structures. Numerical solutions are presented for the temperature distributions induced within a single-layer structure by four non-Fourier propagation modes, namely hyperbolic, wavelike, diffusive and over-diffusive. In addition, the transmission–reflection phenomena induced as the thermal wave propagates through the interface between two layers with dissimilar properties are systematically examined and discussed.