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Heat Manipulation Using Highly Anisotropic Pitch‐Based Carbon Fiber Composites
Author(s) -
Athanasopoulos Nikolaos,
Siakavellas Nicolaos J
Publication year - 2015
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201500085
Subject(s) - materials science , anisotropy , composite material , microscale chemistry , thermal conductivity , fiber , heat flux , thermal , transverse plane , heat transfer , optics , mechanics , thermodynamics , structural engineering , physics , mathematics , mathematics education , engineering
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.