Transformed Fourier and Fick equations for the control of heat and mass diffusion

S. Guenneau, D. Petiteau, M. Zerrad, C. Amra, T. Puvirajesinghe

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

We review recent advances in the control of diffusion processes in thermodynamics and life sciences through geometric transforms in the Fourier and Fick equations, which govern heat and mass diffusion, respectively. We propose to further encompass transport properties in the transformed equations, whereby the temperature is governed by a three-dimensional, time-dependent, anisotropic heterogeneous convection-diffusion equation, which is a parabolic partial differential equation combining the diffusion equation and the advection equation. We perform two dimensional finite element computations for cloaks, concentrators and rotators of a complex shape in the transient regime. We precise that in contrast to invisibility cloaks for waves, the temperature (or mass concentration) inside a diffusion cloak crucially depends upon time, its distance from the source, and the diffusivity of the invisibility region. However, heat (or mass) diffusion outside cloaks, concentrators and rotators is unaffected by their presence, whatever their shape or position. Finally, we propose simplified designs of layered cylindrical and spherical diffusion cloaks that might foster experimental efforts in thermal and biochemical metamaterials.

Original languageEnglish
Article number053404
JournalAIP Advances
Volume5
Issue number5
DOIs
StatePublished - 1 May 2015
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2015 Author(s).

Fingerprint

Dive into the research topics of 'Transformed Fourier and Fick equations for the control of heat and mass diffusion'. Together they form a unique fingerprint.

Cite this