An approach towards a perfect thermal diffuser

TL;DR

This paper introduces a novel anisotropic composite design for thermal diffusers that significantly improves heat removal efficiency, achieving near-ambient temperature distribution and outperforming traditional isotropic diffusers.

Contribution

It presents an analytical and computational approach for designing a perfect thermal diffuser using anisotropic materials with optimized material placement.

Findings

Achieves near-uniform temperature distribution in spherical diffusers.

Reduces source temperature close to ambient conditions.

Demonstrates orders of magnitude performance improvement over isotropic diffusers.

Abstract

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.