The heat rectification coefficient of a composition-graded system of the type AxB1−x, with Aand 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 tem- perature T and composition x, the influence of compositionspatial 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.
Computational analysis of heat rectification in composition-graded systems: From macro-to-nanoscale
CIMMELLI, Vito Antonio;
2016-01-01
Abstract
The heat rectification coefficient of a composition-graded system of the type AxB1−x, with Aand 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 tem- perature T and composition x, the influence of compositionspatial 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.File in questo prodotto:
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