Propagation of thermal waves in a composite medium with interface thermal boundary resistance

This article numerically analyzes the hyperbolic heat conduction problem in a two-layer composite medium under an initial temperature pulse emanating from the exterior surface of one layer. Reflection and transmission occur w hen the initial pulse wave impacts the contact surface of the dissimilar ma terial. An interfacial layer with low conductivity and narrow thickness exi sts at the interface, which is employed to model the thermal boundary resis tance at the contact surface, Analysis results indicate Bat the interface r esistance significantly influences the wave pattern and strength. The prese ntation of the wave nature in Be interfacial layer deforms the initial ware feature and induces secondary wavelets behind the reflected and transmitte d wave. In addition, the piecewise secondary wavelets become smooth when th e interfacial width is very thin. Also examined herein is the effect of con ductivity and thickness width of the interfacial layer coupled with variati on of Be two-layer properties ratio on the reflection-transmission-combinat ion phenomena.