Inverse design of rotating metadevice for adaptive thermal cloaking

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

doi:10.1016/j.ijheatmasstransfer.2021.121417

Cited by 42 publications

(24 citation statements)

References 38 publications

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“…With the emergence of transformation thermotics and thermal metamaterials, the thermal cloak greatly attracted the interest of researchers. Based on the theory of transformation thermotics, researchers have constructed a number of varieties of thermal functional devices: for instance, thermal cloak [ 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ], thermal concentrator [ 13 , 14 ], thermal illusion [ 15 , 16 , 17 , 18 ], thermal camouflage [ 19 , 20 , 21 , 22 , 23 , 24 , 25 ], thermal rotator [ 26 ], and encrypted thermal printing [ 27 ]. The thermal cloak, as a typical representative of heat flux control devices, was first experimentally verified [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Nanoscale Thermal Cloaking in Silicon Film: A Molecular Dynamic Study

Zhang¹,

Zhang²,

Sun³

et al. 2022

Materials

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Nanoscale thermal shielding is becoming increasingly important with the miniaturization of microelectronic devices. They have important uses in the field of thermal design to isolate electronic components. Several nanoscale thermal cloaks based on graphene and crystalline silicon films have been designed and experimentally verified. No study has been found that simultaneously treats the functional region of thermal cloak by amorphization and perforation methods. Therefore, in this paper, we construct a thermal cloak by the above methods, and the ratio of thermal cloaking and response temperature is used to explore its cloaking performance under constant and dynamic temperature boundary. We find that compared with the dynamic boundary, the cloaking effect produced under the constant boundary is more obvious. Under two temperature boundaries, the thermal cloak composed of amorphous and perforated has a better performance and has the least disturbance to the background temperature field. The phonon localization effect produced by the amorphous structure is more obvious than that of the perforated structure. The phonon localization of the functional region is the main reason for the cloaking phenomenon, and the stronger the phonon localization, the lower the thermal conductivity and the more obvious the cloaking effect. Our study extends the nanoscale thermal cloak construction method and facilitates the development of other nanoscale thermal functional devices.

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Section: Introductionmentioning

confidence: 99%

Nanoscale Thermal Cloaking in Silicon Film: A Molecular Dynamic Study

Zhang¹,

Zhang²,

Sun³

et al. 2022

Materials

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“…In addition to the ideal cloaking proposed by theory and demonstrated by experiments, the design is further extended to metamaterials with diversified functions such as concentrators, [ 3,4 ] rotators, [ 5,6 ] illusion metamaterials, [ 7,8 ] encryption, [ 9 ] camouflage, [ 10,11 ] encoding [ 12 ] and diode. [ 13,14 ] After great success in manipulating electromagnetic waves, [ 15–20 ] TO and SC were also proven to be powerful tools to manipulate not only other wave‐based fields like acoustic waves [ 21–23 ] and water waves [ 24–26 ] but also diffusion fields such as thermal flux, [ 27–40 ] electric fields, [ 41–44 ] magnetic fields, [ 45–49 ] diffusive light [ 50–52 ] and mass diffusion. [ 53–62 ] For comparison, metamaterials designed by TO usually exhibit substantial inhomogeneity and anisotropy, while SC provides a simpler way to achieve cloaking for diffusion fields by obeying the Laplacian equation, i.e., Laplacian fields.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to the ideal cloaking proposed by theory and demonstrated by experiments, the design is further extended to metamaterials with diversified functions such as concentrators, [ 3 , 4 ] rotators, [ 5 , 6 ] illusion metamaterials, [ 7 , 8 ] encryption, [ 9 ] camouflage, [ 10 , 11 ] encoding [ 12 ] and diode. [ 13 , 14 ] After great success in manipulating electromagnetic waves, [ 15 , 16 , 17 , 18 , 19 , 20 ] TO and SC were also proven to be powerful tools to manipulate not only other wave‐based fields like acoustic waves [ 21 , 22 , 23 ] and water waves [ 24 , 25 , 26 ] but also diffusion fields such as thermal flux, [ 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ] electric fields, [ 41 , 42 , 43 , 44 ] magnetic fields, [ 45 , 46 , 47 , 48 , 49...…”

Section: Introductionmentioning

confidence: 99%

Mass Diffusion Metamaterials with “Plug and Switch” Modules for Ion Cloaking, Concentrating, and Selection: Design and Experiments

Liu

et al. 2022

Advanced Science

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The outstanding abilities of metamaterials to manipulate physical fields are extensively studied in both wave-based and diffusion-based fields. However, mass diffusion metamaterials, with the ability to manipulate diffusion with practical applications associated with chemical and biochemical engineering,have not yet been experimentally demonstrated. In this work, ion cloaking, concentrating, and selection in liquid solvents are verified by both simulations and experiments, and the concept of a "plug and switch" metamaterial is proposed based on scattering cancellation (SC) to achieve switchable functions by plugging modularized functional units into a functional motherboard. Plugging in any module barely affects the environmental diffusion field, but the module choice impacts different diffusion behaviors in the central region. Cloaking strictly hinds ion diffusion, and concentrating increase diffusion flux, while cytomembrane-like ion selection permits the entrance of some ions but blocks others. In addition, these functions are demonstrated in special applications like the catalytic enhancement by the concentrator and the protein protection by the ion selector. This work not only experimentally demonstrates the effective manipulation of mass diffusion by metamaterials, but also shows that the "plug and switch" design is extensible and reconfigurable. It facilitates novel applications including sustained drug release, catalytic enhancement, bioinspired cytomembranes, etc.

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“…The situation has been transformed with the progress made in thermal metamaterials, which are now able to outperform the natural materials in aspects of adjusting heat flow and provide a distinctive temperature modulation via the introduction of thermal convection [17]. This advancement provides the opportunity to realize various thermal metadevices with numerous schemes like thermal diodes schemes [18], encoded schemes [19], doublet schemes [8], and adaptive schemes [20]. Yet, although great progress has been made in the thermal metamaterial, there are still quite many interesting phenomena for further research [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

The Design of Dynamic Thermal Metadevice with Vertical Rotation Coupling Mechanisms for Switchable Effects

Wang

2022

J. Phys.: Conf. Ser.

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Recently, thermal metamaterials which can control heat flux at will have attracted many researchers and they can be used in many thermal application scenarios such as thermal concentration and thermal cloak. In this paper, this dynamic thermal metadevice with a vertical rotation coupling component can achieve the target of switchable thermal effect based on effective medium theory and scattering cancellation method. Firstly, this metadvice can adjust the effective thermal conductivities in the region with two novel vertical rotation rings by tuning the rotational velocity. Additionally, an almost undistorted and nonspinning thermal field in the central region can be obtained via this novel design. Furthermore, compared with the previous work, this metadevice can implement the continuous modulation of the effective thermal conductivity at will by adopting a vertical rotation scheme, realizing various thermal functionalities such as thermal concentration and thermal cloak. Then, we demonstrate the switchable effect of this dynamic thermal metadevice in simulations. Meanwhile, the variations of temperature along the measured horizonal line are also shown in simulations. In contrast to previous approaches, this dynamic thermal metadevice may provide more dynamic thermal manipulation inspirations for designing novel multifunctional thermal metadevices.

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Inverse design of rotating metadevice for adaptive thermal cloaking

Cited by 42 publications

References 38 publications

Nanoscale Thermal Cloaking in Silicon Film: A Molecular Dynamic Study

Nanoscale Thermal Cloaking in Silicon Film: A Molecular Dynamic Study

Mass Diffusion Metamaterials with “Plug and Switch” Modules for Ion Cloaking, Concentrating, and Selection: Design and Experiments

The Design of Dynamic Thermal Metadevice with Vertical Rotation Coupling Mechanisms for Switchable Effects

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