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首页> 外文期刊>International Journal of Heat and Mass Transfer >Inverse design of rotating metadevice for adaptive thermal cloaking
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Inverse design of rotating metadevice for adaptive thermal cloaking

机译：自适应热包装旋转元的逆设计

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摘要

Thermal metamaterials have been extensively studied due to their extraordinary properties beyond natural materials and offered great flexibilities to tune heat flow for desired thermal functionalities, like thermal cloaking, concentrating, rotating, etc. Whereas, the thermal properties of thermal metamaterials are usually fixed once the configuration and the constituent materials are designed and fabricated. For instance, the thermal cloaking effect may be deteriorated when background changes, which limits its practical application significantly. By deducing the effective thermal conductivities of rotating objects, we propose an adaptive thermal cloaking metadevice that is composed by three rotating layers with different roles. The joint effect of three rotating layers makes the effective thermal conductivity a real number on the reciprocity line for feasible implementation. When background changes, we only need change the angular velocities rather than change the configuration or the constituent materials to restore the cloaking effect, which is much more convenient and real-time for practical applications. The underlying physics of the rotating thermal cloak is discussed to identify the key parameters and upper and lower limits of the effective thermal conductivity for further improving the cloaking effect. The present study can trigger more rotating metadevices for novel applications beyond thermal cloaking.
机译：由于其超出天然材料的特殊性质，热超材料进行了广泛研究，并为所需的热函数调整热流的极大灵活性，如热包装，浓缩，旋转等，而热超材料的热性能通常是一次固定设计和构成材料设计和制造。例如，当背景变化时，热包装效果可能会劣化，这会显着限制其实际应用。通过推导出旋转物体的有效热导体，我们提出了一种自适应热包装元，其由具有不同角色的三个旋转层组成。三个旋转层的关节效果使得有效的导热性在可行的实施中的互动线上的实数。当背景变化时，我们只需要改变角速度而不是改变配置或组成材料以恢复粘附效果，这对于实际应用来说是更方便和实时的。讨论旋转热裂纹的底层物理学以识别有效导热率的关键参数和上限和下限，以进一步改善粘附效果。目前的研究可以触发更多的旋转元，用于除了热包装之外的新应用。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2021年第9期|121417.1-121417.8|共8页
  • 作者

    Zhan Zhu; Xuecheng Ren; Wei Sha; Mi Xiao; Run Hu; Xiaobing Luo;

  • 作者单位

    School of Energy and Power Engineering Huazhong University of Science and Technology Wuhan 430074 China;

    School of Energy and Power Engineering Huazhong University of Science and Technology Wuhan 430074 China;

    State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and Technology Wuhan 430074 China;

    State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and Technology Wuhan 430074 China No.55 Research Institute of China North Industries Group Corporation Changchun 130012 China;

    School of Energy and Power Engineering Huazhong University of Science and Technology Wuhan 430074 China;

    School of Energy and Power Engineering Huazhong University of Science and Technology Wuhan 430074 China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Thermal metamaterials; Thermal cloaking; Rotating metadevice; Effective thermal conductivity;

    机译：热超材料;热包装;旋转元等;有效的导热系数;

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