A method for the most efficient removal of heat, through an anisotropic composite, is proposed. It is shown that a rational placement of constituent materials, in the radial and the azimuthal variation, at a given point in the composite yields a uniform temperature distribution in spherical diffusers, accompanied by a very significant reduction of the source temperature, in principle, to infinitesimally above the ambient temperature, and underlies the design of a perfect thermal diffuser. Orders of magnitude enhanced performance, compared to that obtained through the use of a diffuser constituted from a single material with isotropic thermal conductivity has been observed and the analytical principles underlying the design were validated through extensive computational simulations.
@article{arxiv.1512.04140,
title = {An approach towards a perfect thermal diffuser},
author = {Krishna P. Vemuri and Prabhakar R. Bandaru},
journal= {arXiv preprint arXiv:1512.04140},
year = {2015}
}