斗篷
掩蔽
热导率
离散化
超材料
热的
共形映射
材料科学
热流密度
传热
热传导
机械
机械工程
计算机科学
拓扑(电路)
物理
几何学
光电子学
热力学
复合材料
数学分析
数学
工程类
组合数学
作者
Xiao-Chang Xing,Lingling Wu,Xin Dai,Xiaoyong Tian,Dichen Li
标识
DOI:10.1016/j.ijheatmasstransfer.2023.124437
摘要
Multifunctional heat flux manipulation plays an essential role on the industrial processes. A well-designed spatial distribution of thermal conductivity enables a variety of thermal functions, including thermal cloaks and rotators. Despite the promising potential of metamaterials in achieving multifunctional heat transfer in complex nonconformal geometries, significant challenges remain due to limitations in design methods. In this work, a novel approach based on conformal discretization was proposed to address these major challenges, in which the thermal conductivity tensors of discrete functional cells were diagonalized with the local thermal conductivity tensors as inputs. To verify the effectiveness of the conformal discretization, a nonconformal thermal rotating cloak was designed and manufactured. Both simulations and experiments confirmed the effectiveness of this approach in obtaining multifunctional thermal metamaterial with remarkable thermal cloaking and rotating capabilities. Moreover, the nonconformal thermal rotating cloak still maintained thermal functionality well under the condition of omnidirectional heat flow. This work provides a feasible approach to realize multifunctional thermal manipulation in arbitrarily transformed regions, and thus shows significant application potential in the fields of aerospace engineering and civil engineering.
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