论文标题
纳米级热传输中的逆设计通过插值界面声子传输
Inverse Design in Nanoscale Heat Transport via Interpolating Interfacial Phonon Transmission
论文作者
论文摘要
我们介绍了一种基于基于伴随的磁子Boltzmann传输方程（BTE）和一种新型材料插值技术的“传输插值模型”（TIM）的基于伴随的灵敏度分析，以基于纳米结构中的非峰热传输的密度拓扑优化纳米结构中的非峰热传输方法。 BTE优化的主要挑战是处理实地和动量分辨材料特性之间的相互作用。通过使用界面传输系数参数化材料密度，Tim能够恢复硬壁和无接口限制，同时确保空隙和实心区域之间的平稳过渡。我们首先使用我们的方法来定制周期性纳米材料的有效热导张量。然后，我们在约束扩散传输下最大化经典的声子大小效应，从而确定了有希望的新热电材料设计。我们的方法可以系统地优化用于热量管理和转换的材料，更广泛地，是扩散传输无效的设备的设计。
We introduce a methodology for density-based topology optimization of non-Fourier thermal transport in nanostructures, based upon adjoint-based sensitivity analysis of the phonon Boltzmann transport equation (BTE) and a novel material interpolation technique, the "transmission interpolation model" (TIM). The key challenge in BTE optimization is handling the interplay between real- and momentum-resolved material properties. By parameterizing the material density with an interfacial transmission coefficient, TIM is able to recover the hard-wall and no-interface limits, while guaranteeing a smooth transition between void and solid regions. We first use our approach to tailor the effective thermal-conductivity tensor of a periodic nanomaterial; then, we maximize classical phonon size effects under constrained diffusive transport, identifying a promising new thermoelectric material design. Our method enables the systematic optimization of materials for heat management and conversion and, more broadly, the design of devices where diffusive transport is not valid.
