Tunable Heat-Flux Rectification in Graded Nanowires in Non-Linear Guyer-Krumhansl Regime
Carlomagno, Isabella (University of Salerno)
Cimmelli, Vito Antonio (University of Basilicata)
Jou i Mirabent, David, 1953- (Universitat Autònoma de Barcelona. Departament de Física)

Data:	2023
Resum:	We study heat rectification in composition-graded nanowires, with nonlocal and nonlinear effects taken into account in a generalized Guyer-Krumhansl equation. Using a thermal conductivity dependent on composition and temperature, the heat equation is solved. Introducing a non-vanishing heat supply (as for instance, a lateral radiative heat supply), we explore the conditions under which either nonlocal or nonlinear effects or both contribute to heat rectification and how they may be controlled by means of the external radiative flux. The corresponding rectification coefficients are calculated as well, and the physical conditions under which the system becomes a thermal diode are pointed out.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Heat rectification ; Graded materials ; Composition-dependent thermal conductivity ; Nonlinear Guyer-Krumhansl equation
Publicat a:	Nanomaterials, Vol. 13, Issue 9 (May 2023) , art. 1442, ISSN 2079-4991

DOI: 10.3390/nano13091442
PMID: 37176987

14 p, 480.0 KB

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