Heat Manipulation Using Highly Anisotropic Pitch‐Based Carbon Fiber Composites1. Issue 10 (30th March 2015) - Athanasopoulos, Nikolaos
Abstract Heat flux manipulation, using continuous and highly anisotropic pitch‐based carbon fiber composites, was extensively studied. Homogeneous, highly anisotropic, and non‐singular materials were developed and studied in order to protect critical regions and nullify the heat flux through the protected region. The proposed materials take advantage of the ultrahigh thermal conductivity along the fiber, as well as the small thermal conductivity of the matrix material transverse to the fibers. The sequence of fiber–matrix–fiber transverse to fiber direction in microscale constructs a highly efficient manipulation device due to the high thermal anisotropy. The results were compared to efficient multilayer homogeneous thermal cloaks. The calculated ideal temperature field and the measured one prove the efficiency of this design approach. The same philosophy can be applied in 3D space.