Near-field radiative heat transfer in a chain of nanoparticles with another chain in proximity
Near-field radiative heat transfer in a chain of nanoparticles with another chain in proximity
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DOI：
10.1615/rad-19.470
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发表时间：
2020-03
影响因子：
2.3
通讯作者：
Minggang Luo;Junming Zhao;L. Liu
中科院分区：
文献类型：
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作者：
Minggang Luo;Junming Zhao;L. Liu
摘要多体相互作用对颗粒物近场辐射换热具有复杂的影响，既能增强也能抑制近场辐射换热。本文基于多体辐射传热理论，研究了室温下颗粒链（主链）与邻近链（邻近链）之间的NFRHT。电介质颗粒和金属颗粒都被考虑在内。近场邻近链的存在会产生明显的多体效应，抑制主链的热传递。同时，主链周围的能量密度分布减弱。邻近链对Ag主链中的NFRHT的抑制作用弱于SiC主链中的NFRHT。SiC近侧链比Ag近侧链更显著地抑制SiC主链中的NFRHT，这归因于在特征热波长附近两个链中的颗粒之间的局域表面声子共振（LSPR）的强耦合。而对于Ag主链，由于热频率与粒子共振频率的不匹配，邻近链对主链中的NFRHT的影响很弱。在主链中，具有不同纵向平移距离的邻近链对NFRHT的影响可以忽略不计。这一工作将有助于理解颗粒体系中多体相互作用对NFRHT的影响。
Abstract Many-body interaction has complex effect on near-field radiative heat transfer (NFRHT) in particulate systems, which can not only enhance but also inhibit NFRHT. This work studies the NFRHT in a chain of particles (main chain) with another chain in proximity (proximate chain) at room temperature based on the many-body radiative heat transfer theory. Both dielectric and metallic particles are considered. Significant many-body effect is observed with the existence of a proximate chain in the near field, which generally inhibits heat transfer in the main chain. Meanwhile, the energy density distribution around the main chain is weakened. The proximate chain has weaker inhibition effect on NFRHT in the Ag main chain than that on NFRHT in the SiC main chain. The SiC proximate chain inhibits NFRHT in the SiC main chain more significantly than the Ag proximate chain, which is attributed to strong coupling of localized surface phonon resonance (LSPR) between the particles in the two chains around the characteristic thermal wavelength. For Ag main chain, however, due to mismatch between the thermal frequency and the particle resonance frequency, the proximate chain shows very weak effect on NFRHT in the main chain. The proximate chain with various translation distances in its longitudinal direction has negligible effect on NFRHT in the main chain. This work will help the understanding of the effect of many-body interaction on NFRHT in particulate system.