TY - JOUR
T1 - Computational analysis of heat rectification in composition-graded systems: From macro-to-nanoscale
AU - Carlomagno, I.
AU - Cimmelli, V. A.
AU - Jou, D.
PY - 2016/1/15
Y1 - 2016/1/15
N2 - © 2015 Elsevier B.V. All rights reserved. The heat rectification coefficient of a composition-graded system of the type AxB1-x, with A and B being theoretical materials, and composition x changing along the length of the system, is considered. By starting from a mathematical model for the thermal conductivity of the material λ in terms of temperature T and composition x, the influence of composition spatial distribution, heat flux, length of the system, and minimum of λ(T,x) on the rectification coefficient is explored. In some circumstances, a reversal in the direction of the rectification is observed for increasing heat flux.
AB - © 2015 Elsevier B.V. All rights reserved. The heat rectification coefficient of a composition-graded system of the type AxB1-x, with A and B being theoretical materials, and composition x changing along the length of the system, is considered. By starting from a mathematical model for the thermal conductivity of the material λ in terms of temperature T and composition x, the influence of composition spatial distribution, heat flux, length of the system, and minimum of λ(T,x) on the rectification coefficient is explored. In some circumstances, a reversal in the direction of the rectification is observed for increasing heat flux.
KW - Direct heat flux
KW - Graded systems
KW - Heat rectification
KW - Size effects in nanosystems
UR - https://www.scopus.com/pages/publications/84948649312
U2 - 10.1016/j.physb.2015.11.012
DO - 10.1016/j.physb.2015.11.012
M3 - Article
SN - 0921-4526
VL - 481
SP - 244
EP - 251
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
ER -