Advanced thermal metamaterial design for temperature control at the cloaked region

Imran, Muhammad; Zhang, Liangchi; Gain, Asit Kumar

doi:10.1038/s41598-020-68481-6

Cited by 19 publications

(12 citation statements)

References 48 publications

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“…[49][50][51] The realization of a metamaterial has created opportunities in various emerging fields such as phononics, [52] photonics, [53,54] mechanical topological insulators, [55,56] and programmable materials. [57,58] Through intelligent material architecting, researchers have been able to: achieve unique mechanical (e.g., negative/zero Poisson's ratio [59][60][61][62][63] ), optical (e.g., negative refractive index, [64] optical cloaking [65] ), and electromagnetic (e.g., negative permittivity, [66] EM cloaking [67] ) properties; tune wave propagation characteristics (e.g., tailored bandgaps, [68][69][70] defect-immune wave motion, [71] seismic wave barriers, and foundations [72][73][74] ); attain bulk/topological thermal systems; [75,76] and build reconfigurable/flexible mechanical systems. [77,78] However, prior research has focused on metamaterials with a single functionality.…”

Section: Introductionmentioning

confidence: 99%

A Microvascular‐Based Multifunctional and Reconfigurable Metamaterial

Devi

Pejman

Phillips

et al. 2021

Adv Materials Technologies

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Nearly all‐natural and synthetic composites derive their characteristic attributes from a hierarchical makeup. Engineered metamaterials exhibit properties not existing in natural composites by precise patterning, often periodically on size scales smaller than the wavelength of the phenomenon they influence. Lightweight fiber‐reinforced polymer composites, comprising stiff/strong fibers embedded within a continuous matrix, offer a superior structural platform for micro‐architectured metamaterials. The emergence of microvascular fiber‐composites, originally conceived for bioinspired self‐healing via microchannels filled with functional fluids, provides a unique pathway for dynamic reconfigurable behavior. Demonstrated here is the new ability to modulate both electromagnetic and thermal responses within a single structural composite by fluid substitution within a serpentine vasculature. Liquid metal infiltration of varying density micro‐channels alters polarized radio‐frequency wave reflection, while water circulation through the same vasculature enables active‐cooling. This latest approach to control bulk property plurality by widespread vascularization exhibits minimal impact on structural performance. Detailed experimental/computational studies, presented in this paper, unravel the effects of micro‐vascular topology on macro‐mechanical behavior. The results, spanning multiple physics, provide a new benchmark for future design optimization and real‐world application of multifunctional and adaptive microvascular composite metamaterials.

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Section: Introductionmentioning

confidence: 99%

A Microvascular‐Based Multifunctional and Reconfigurable Metamaterial

Devi

Pejman

Phillips

et al. 2021

Adv Materials Technologies

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“…[ 31 ] Recently, a study took natural convection as a cooling tool for designing and optimizing a thermal cloaking device. [ 32 ]…”

Section: Enhancing Heat Transfermentioning

confidence: 99%

Convective Thermal Metamaterials: Exploring High‐Efficiency, Directional, and Wave‐Like Heat Transfer

et al. 2023

Advanced Materials

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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 conduction can be transformed to hyperbolic. Therefore, the hybrid diffusive system can be interpreted in a wave‐like fashion, reviving many wave phenomena in dissipative diffusion. Here, recent advancements in convective thermal metamaterials are reviewed and the state‐of‐the‐art discoveries are classified into the following four aspects, enhancing heat transfer, porous‐media‐based thermal effects, nonreciprocal heat transfer, and non‐Hermitian phenomena. Finally, a prospect is cast on convective thermal metamaterials from two aspects. One is to utilize the convective parameter space to explore topological thermal effects. The other is to further broaden the convective parameter space with spatiotemporal modulation and multi‐physical effects.

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“…Most devices, such as those mentioned above, are meant to control thermal conduction due to the use of forminvariant conduction equations for transformation thermodynamics. Metamaterials for thermal convection [180][181][182] and radiation 183,184 control currently are being studied. TMs also are being studied and fabricated on the microscopic level through phonon or photon manipulation.…”

Section: Materials Advancesmentioning

confidence: 99%