Open AccessDesign of two-dimensional plate directional heat transmission structure based on meta materials
Author(s) -
Lei Sun,
Zhe-Feng Yu,
Jie Huang
Publication year - 2015
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.64.224401
Subject(s) - materials science , heat flux , thermal conductivity , thermal insulation , thermal , heat spreader , heat transfer , mechanics , composite material , thermodynamics , physics , layer (electronics)
Based on the transformation thermodynamics, the thermal conductivity expression for the unit cell of the directional heat transmission structure is derived by the oblique and rotary coordinate transformation. We obtain the two-dimensional plate directional heat transmission structure through periodically arranging the unit cells which are realized by layering copper and thermal insulation materials. The results from the numerical calculation indicate that the heat flux flows from the upper surface of the directional heat transmission structure to the two sides, while the upper and lower surface remain at low temperature. Compared with the temperature of SiO2 aerogel thermal insulation material, the upper surface temperature falls 33.3%, the low surface temperature falls 4.3%, while the temperatures of the two sides rise 40.1%. The decrease of the upper surface temperature indicates that the heat on the upper surface can be guided timely, and then the infrared radiation can be weakened. The decrease of the lower surface temperature indicates that the adiabatic efficiency of the directional heat transmission structure is superior to that of the SiO2 aerogel thermal insulation material. The heat transmission from the upper surface to the sides is conducive to the good use of the heat flux. The directional heat transmission has a potential application in the infrared stealth and heat protection.