Thermal metamaterials, benefitting from ingenious design and construction of artificial structures, commonly exhibit amazing heat conduction characteristics beyond naturally occurring materials in conventional scenarios. Based on the transformation thermodynamics theory and the effective medium theory, two types of metamaterial structure devices aiming to manipulate heat flow were artificially designed and fabricated with the aid of selective laser melting additive manufacturing technology in this work. The well-designed thermal metamaterial structures respectively achieved the thermal self-focus and thermal torsion functions. The relation of the configuration geometric parameters and the heat flux changes of the thermal metamaterial devices was carefully dissected. Following the geometric optimization design, the heat transfer directions achieved to be precisely manipulated as the design wishes. The changes in both heat flux and temperature distribution on the thermal self-focus and thermal torsion devices were traced through the numerical simulation and experimental measurement methods. The thermal simulation results were highly consistent with the experimental findings of the design-intended manipulation effects on the heat flow. The research work verified the applicability of the thermal metamaterial structures fabricated with the assist of selective laser melting in the thermal engineering fields.

得益于人工结构的巧妙设计和构建，热超材料通常表现出超越常规场景中天然材料的惊人导热特性。本文基于热力学变换理论和有效介质理论，借助选择性激光熔化增材制造技术，人工设计和制造了两种旨在操纵热流的超材料结构装置。精心设计的热超材料结构分别实现了热自聚焦和热扭转功能。仔细剖析了热超材料器件的配置几何参数与热通量变化的关系。遵循几何优化设计，传热方向可按照设计要求进行精确控制。通过数值模拟和实验测量方法追踪了热自聚焦和热扭转装置的热通量和温度分布的变化。热模拟结果与设计意图操纵对热流的影响的实验结果高度一致。研究工作验证了选择性激光熔化辅助制造的热超材料结构在热工程领域的适用性。热模拟结果与设计意图操纵对热流的影响的实验结果高度一致。研究工作验证了选择性激光熔化辅助制造的热超材料结构在热工程领域的适用性。热模拟结果与设计意图操纵对热流的影响的实验结果高度一致。研究工作验证了选择性激光熔化辅助制造的热超材料结构在热工程领域的适用性。