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Thermal nonreciprocity typically stems from nonlinearity or spatiotemporal variation of parameters. However, constrained by the inherent temperature‐dependent properties and the law of mass conservation, previous works have been compelled to treat dynamic and steady‐state cases separately. Here, by establishing a unified thermal scattering theory, the creation of a convection‐based thermal metadevice...
Convective thermal metamaterials are artificial structures where convection dominates in the thermal process. Due to the field coupling between velocity and temperature, convection provides a new knob for controlling heat transfer beyond pure conduction, thus allowing active and robust thermal modulations. With the introduced convective effects, the original parabolic Fourier heat equation for pure...
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