Black-hole-inspired thermal trapping with graded heat-conduction metadevices.

ABSTRACT: The curved space-time produced by black holes leads to the intriguing trapping effect. So far, metadevices have enabled analogous black holes to trap light or sound in laboratory spacetime. However, trapping heat in a conductive environment is still challenging because diffusive behaviors are directionless. Inspired by black holes, we construct graded heat-conduction metadevices to achieve thermal trapping, resorting to the imitated advection produced by graded thermal conductivities rather than the trivial solution of using insulation materials to confine thermal diffusion. We experimentally demonstrate thermal trapping for guiding hot spots to diffuse towards the center. Graded heat-conduction metadevices have advantages in energy-efficient thermal regulation because the imitated advecti

SUBMITTER: Xu L 

PROVIDER: S-EPMC10016200 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature