The emerging thermal metamaterials and metadevices demonstrate significant potential to transform thermal conduction. However, the thermal conductivities of existing devices are all restricted at fixed values if the configuration or constituent materials are static. Thermal convection provides an additional tool to boost and flexibly modify the heat transfer in moving matter, but it is essentially distinct from thermal conduction since the Onsager reciprocity is generally broken in the former but preserved in the latter. Therefore, it is difficult to use convective components for sophisticated control of conductive heat. Here, it is shown that a convective system can be made undistinguishable from a conductive one in principle, by discovering and operating on the reciprocal line of mechanically rotating systems. The realized thermal metadevice can thus mimic a solid‐like material whose thermal conductivity dynamically covers a wide range. It offers great possibilities of real‐time smooth control over heat transfer for broad applications.

中文翻译：

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往复线上的连续可调固体类对流热元设备。

新兴的热超材料和超设备显示出巨大的潜力来改变热传导。但是，如果配置或组成材料是静态的，则现有设备的热导率都被限制在固定值。热对流提供了一种额外的工具来增强和灵活地改变运动物质中的热传递，但是它与热传导本质上是不同的，因为Onsager互易性通常在前者中被破坏，而在后者中被保留。因此，难以将对流部件用于传导热的复杂控制。在此示出，通过发现并在机械旋转系统的倒数线上进行操作，可以使对流系统在原理上与导电系统无法区分。因此，已实现的热元设备可以模仿固体材料，其热导率可动态覆盖广泛的范围。对于广泛的应用，它提供了实时平稳地控制传热的巨大可能性。