DYNAMIC THERMAL MANIPULATION IN DIFFUSIVE SYSTEMS

Abstract

The study of dynamic thermal manipulation in diffusive systems can further realize the vision of controlling heat flow at will and has attracted considerable interest from researchers. First, the high energy consumption and inhomogeneous issues of the traditional zero-index scheme have been addressed. Then, a new theoretical tool—twisted thermotics is proposed and developed for twist diffusion systems, resulting in the thermal function switching from cloaking to concentration. For the practical applications of dynamic thermal manipulation, a charging-free TREC cell system with switchable thermal regulation is developed successfully, exhibiting a continuously high energy generation in daytime and night with 3.3 W/m2 and 0.55 W/m2, respectively. In this thesis, we elucidate the mechanisms of various dynamic thermal couplings in diffusive systems and demonstrate applications in TREC systems for low grade heat harvesting.