Abstract

Following the recent research enthusiasm on the effect of geometry on near-field heat transfer (NFHT) enhancement, we present an analysis based on simplified yet highly efficient graphene and nanotube models. Two geometries are considered: that of two parallel infinite “graphene” surfaces and that of a one-dimensional infinite “nanotube” line in parallel with an infinite surface. Due to its symmetry, the former is in principal simpler to analyze and even so, earlier works suggested that the application of a full model in this problem still demands heavy computations. Among other findings, our simplified computation – having successfully replicated the results of relevant earlier works – suggests a sharper NFHT enhancement dependence on distance for the line-surface system, namely J ~ d^−5.1 as compared to J ~ d^−2.2 for the parallel surface. Such comparisons together with applications of our efficient approach would be the important first steps in the attempt to find a general rule describing geometric dependence of NFHT.

Graphical abstract

中文翻译：

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使用有效的石墨烯和纳米管模型对近场传热分析的几何影响

摘要

继对几何形状对近场热传递（NFHT）增强的影响的最新研究热情之后，我们提出了基于简化而高效的石墨烯和纳米管模型的分析。考虑了两种几何形状：两个平行的无限“石墨烯”表面的几何形状以及与无限表面平行的一维无限“纳米管”线的几何形状。由于其对称性，前者原则上更易于分析，即使如此，早期的工作也表明，在此问题中使用完整模型仍然需要大量计算。在其他的研究结果，我们的简化计算-在成功复制相关的早期作品的结果-建议对距离的线面系统，即一个更清晰的NFHT增强依赖Ĵ〜d^-5.1相比Ĵ〜d ^-2.2为平行面。这样的比较以及我们有效方法的应用将是尝试找到描述NFHT的几何依赖性的一般规则的重要的第一步。

图形概要