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arXiv 2110.14744cond-mat.stat-mech
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三维质量梯度非谐振子晶格中的热整流

Thermal rectification in three-dimensional mass-graded anharmonic oscillator lattices

M. Romero-Bastida, M. Lindero-Hernández

摘要:

在这项工作中,我们研究了热整流效率,即,利用非平衡分子动力学模拟,对长$N$和宽$W$的三维质量梯度非谐晶格的非对称热流进行了研究。得到的整流,这是相同的数量级的相应的一维晶格,饱和在低的纵横比$W/N$的值,与已知的行为相一致的相应的热通量的均匀系统在类似的条件下。最大整流是在温度范围内,其中没有整流可以在其他一维系统中,以及在相应的一维的情况下,本文研究的模型中获得。

英文摘要:

In this work we study the thermal rectification efficiency, i.e., asymmetric heat flow, of a three-dimensional mass-graded anharmonic lattice of length $N$ and width $W$ by means of nonequilibrium molecular dynamics simulations. The obtained rectification, which is of the same order of magnitude as that of the corresponding one-dimensional lattice, saturates at low values of the aspect ratio $W/N$, consistent with the already known behavior of the corresponding heat fluxes of the homogeneous system under analogous conditions. The maximum rectification is obtained in the temperature range wherein no rectification could be obtained in other one-dimensional systems, as well as in the corresponding one-dimensional instance of the model studied herein.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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