Travel to Attend the 12th AIAA/ASME Joint Thermophysics and Heat Transfer Conference (Atlanta, GA, USA, June 25-29, 2018)

热整流小组将在第12届AIAA/ASME联合热物理和传热学会议上举行，这是AIAA(美国航空航天学会)和ASME(美国机械工程师学会)传热部的合作项目。热整流可以通过改进被动热管理和实现更高的性能，在许多可以从这种现象中受益的设备中产生重大影响，例如电流电子设备。其他技术可以以热开关、二极管和调节器等热设备的形式开发，这些设备可以结合在一起，以制作用于能源、存储和通信的电子电路的热模拟。热整流是一种热传输依赖于单轴方向的现象，类似于p和n结电整流器(或二极管)，它允许电流在一个方向上流动，但在合理的低正向和反向偏置下不能在另一个方向上流动。与电子整流器不同的是，已经有许多产生热整流效应的机制(至少在概念上)进行了理论推导和论证。基于不同机制的观察早在20世纪30年代就被记录在案，近年来人们对此的兴趣显著增加。这些机构有一个共同的特点，那就是它们要求系统沿整流轴不对称。这些不对称的形式包括不同材料之间的界面、重力、表面发射率属性、热导率的温度相关性等，尽管现实效果及其大小在其中几个领域仍然是一个有争议的主题。该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

The Thermal Rectification panel will be held at the 12th AIAA/ASME Joint Thermophysics and Heat Transfer Conference, which is a collaboration between AIAA (American Institute of Aeronautics and Astronautics) and the Heat Transfer Division of ASME (American Society of Mechanical Engineers). Thermal rectification can have a significant impact in many devices that can benefit from this phenomenon, such as current electronics, by improving passive thermal management and allowing for higher performance. Additional technologiescould be developed in the form of thermal devices like thermal switches, diodes, andregulators, that could be combined to make thermal analogies to electronic circuits for energy,memory, and communications. These envisioned devices will require a full understanding of thermal rectification.Thermal rectification is a phenomenon in which thermal transport is dependent on direction along a single axis, analogous to the p and n junction electrical rectifier (or diode) that allows current to flow in one direction, but not in the other under reasonably low forward and reverse bias. Unlike the electrical rectifier, there have been many mechanisms theorized and demonstrated (at least conceptually) that produce a thermally rectifying effect. Observations based on different mechanisms have been documented as early as in the 1930s and saw a significant increase in interested in the recent years. These mechanisms have one characteristic in common in that they require an asymmetry in the system along the rectifying axis. These asymmetries have been of the form of interfaces between dissimilar materials, gravity, surface emissivity properties, temperature dependence of thermal conductivities, and more, although the realistic effect and its magnitude is still a subject of controversy in several of these.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.