IF 2.4 3区 物理与天体物理 Q1 Mathematics
M Romero-Bastida
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引用次数: 0

摘要

热共振,即通过周期性外部驱动获得的热通量,为控制适用于发电、冷却和热电等领域的纳米级设备中的热通量提供了可能。在这项工作中,我们通过分子动力学模拟,研究了现场电势周期对热共振现象的影响,该现象存在于由两个不同的 Frenkel-Kontorova 晶格组成的一维系统中,这两个晶格通过时间调制耦合连接,并与两个在不同温度下工作的蓄热器相接触。当系统两侧的现场电势周期相等时,考虑的最低周期值可获得最大共振。对于结构高度不对称的晶格,流向冷储层的热通量最大,而不对称的原位势能周期为控制体系两侧热通量的大小提供了一种额外的方法。我们的研究结果凸显了基底结构对热共振的重要性,并将激励热器件设计的进一步发展。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of external potential on the energy transport in harmonically driven segmented Frenkel-Kontorova lattices.

Thermal resonance, that is, the heat flux obtained by means of a periodic external driving, offers the possibility of controlling heat flux in nanoscale devices suitable for power generation, cooling, and thermoelectrics, among others. In this work we study the effect of the onsite potential period on the thermal resonance phenomenon present in a one-dimensional system composed of two dissimilar Frenkel-Kontorova lattices connected by a time-modulated coupling and in contact with two heat reservoirs operating at different temperature by means of molecular dynamics simulations. When the periods of the onsite potential on both sides of the system are equal, the maximum resonance is obtained for the lowest considered value of the period. For highly structurally asymmetric lattices, the heat flux toward the cold reservoir is maximized, and asymmetric periods of the onsite potential afford an extra way to control the magnitude of the heat fluxes in each side of the system. Our results highlight the importance of the substrate structure on thermal resonance and could inspire further developments in designing thermal devices.

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来源期刊
Physical review. E
Physical review. E 物理-物理:流体与等离子体
CiteScore
4.60
自引率
16.70%
发文量
0
审稿时长
3.3 months
期刊介绍: Physical Review E (PRE), broad and interdisciplinary in scope, focuses on collective phenomena of many-body systems, with statistical physics and nonlinear dynamics as the central themes of the journal. Physical Review E publishes recent developments in biological and soft matter physics including granular materials, colloids, complex fluids, liquid crystals, and polymers. The journal covers fluid dynamics and plasma physics and includes sections on computational and interdisciplinary physics, for example, complex networks.
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