Thermal rectification in bulk materials with asymmetric shape
D. Sawaki, W. Kobayashi, Y. Moritomo, and I. Terasaki
TL;DR
This paper studies how the shape of bulk materials, specifically pyramids, affects thermal rectification, demonstrating shape-dependent differences in rectifying coefficients and proposing methods to enhance rectification based on shape.
Contribution
It provides a numerical analysis of shape dependence in thermal rectification and suggests ways to optimize rectifying performance through shape modifications.
Findings
Rectifying coefficient R is 1.35 for pyramid shape
Rectifying coefficient R is 1.43 for rectangular shape
Shape optimization can increase R based on numerical calculations
Abstract
We investigate thermal rectification in a bulk material with a pyramid shape to elucidate shape dependence of the thermal rectification, and find that rectifying coefficient R is 1.35 for this shape, which is smaller than R=1.43 for a rectangular shape. This result is fully duplicated by our numerical calculation based on Fourier's law. We also apply this calculation to a given shape, and show a possible way to increase R depending on the shape.
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