Damping and Resonance Characteristics of Thermal Waves

Abstract

Amplification of thermal waves in response to high-frequency excitations is studied in this work. The resonance behavior is explored along with the underdamped behavior in thermal wave oscillations. In transition from an overdamped to an underdamped wave behavior, the relaxation distance is found to dominate the process. A relationship between the resonance frequency and the thermal wave speed is derived. The emphasis is placed on the frequency approach determining the thermal wave speed in engineering materials.