Speaker
Description
We propose to characterize materials with variable thermal properties by aiming a laser beam at a metal target in periodic motion. The intense heat flow from the laser is then dissipated by the movement of the target and can be observed and characterized by IR thermography (Figure 1). We will present the models and initial experiments in comparison with a stationary target. This type of study foreshadows the development of “thermal metamaterials” with apparent properties that can be adjusted according to the movement of the targets. The approach to metamaterials is highly developed in optics and acoustics [1-2], but to our knowledge, little has been done in heat transfer, especially experimentally [3-4]. This movement remains macroscopically stationary since it will be periodic. It paves the way for the design of new types of heat spreaders, such as thermal diodes.
