LAUSR

In this paper, we studied the heat flux effect of thermal metamaterials according to the distance of each layer, which can effectively suppress heat propagation and improve an adiabatic property, through the three-dimensional finite-difference time-domain simulation. Based on multiple layers of thermal meta-materials, the heat flux in the propagation direction could be suppressed by thermal meta-layers. The heat flux transferred through the gap between thermal meta-layers could also be efficiently suppressed by controlling the gap of each meta-layer in a concrete block. It was found that the heat transfer characteristics and the thermal insulation efficiency can be adjusted according to the change of the distance in the 5-layers meta-structure. Furthermore, the adiabatic property greatly changed depending on the location of the heat source and the thermal meta-structure transferred into the concrete. The appropriate thickness of each meta-layer should be used to suppress heat transfer and improve adiabatic properties in the concrete structure from the results of the 10-layer meta-structure.