Acoustic tunneling through artificial structures: From phononic crystals to acoustic metamaterials

Peng, Pai; Qiu, Chunyin; Ding, Yiqun; He, Zhaojian; Yang, Hai; Liu, Zhengyou

doi:10.1016/j.ssc.2010.12.008

Cited by 11 publications

(6 citation statements)

References 25 publications

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“…A careful design of the micro-level architecture enables metamaterials to provide exceptional macro-behavior, properties, and functionalities that surpass those of standard materials. [6] For more than two decades, metamaterials that manipulate optical, [7,8] acoustic, [9] and thermal [10] fields as well as stress waves, [11][12][13] and that have highly unusual properties, such as a "negative mass" [14][15][16] or ultra-high stiffness to weight ratio [17] have attracted a great deal of attention. Multistable metamaterials, consisting of an array of bistable units, are a promising class of mechanical metamaterials.…”

Section: Doi: 101002/adma202301483mentioning

confidence: 99%

Multistable Metafluid based Energy Harvesting and Storage

et al. 2023

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The thermodynamic properties of fluids play a crucial role in many engineering applications, particularly in the context of energy. Fluids with multistable thermodynamic properties may offer new paths for harvesting and storing energy via transitions between equilibria states. Such artificial multistable fluids can be created using the approach employed in metamaterials, which controls macro‐properties through micro‐structure composition. In this work, the dynamics of such “metafluids” is examined for a configuration of calorically‐perfect compressible gas contained within multistable elastic capsules flowing in a fluid‐filled tube. The velocity‐, pressure‐, and temperature‐fields of multistable compressible metafluids is studied by both analytically and experimentally, focusing on transitions between different equilibria. The dynamics of a single capsule is first examine, which may move or change equilibrium state, due to fluidic forces. The interaction and motion of multiple capsules within a fluid‐filled tube is then studied. It shows that such a system can be used to harvest energy from external temperature variations in either time or space. Thus, fluidic multistability allows specific quanta of energy to be captured and stored indefinitely as well as transported as a fluid, via tubes, at standard atmospheric conditions without the need for thermal isolation.

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Section: Doi: 101002/adma202301483mentioning

confidence: 99%

Multistable Metafluid based Energy Harvesting and Storage

et al. 2023

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“…While made from standard materials, the geometry of their building blocks can give rise to unique behaviors 5 . For example, metamaterials have been designed to have "negative mass" [6][7][8] , to manipulate light 9,10 and stress waves [11][12][13] , or to provide ultra-high stiffness to weight ratio 14 . Multistable meta-materials feature a multitude of possible equilibrium configurations for a prescribed load.…”

Section: Introductionmentioning

confidence: 99%

A metafluid with multistable density and internal energy states

Peretz

Abu

Zigelman

et al. 2021

Preprint

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The efficiency, operation range, and environmental safety of energy and refrigeration cycles are determined by the thermodynamic properties of available fluids. We here suggest combining gas, liquid and multistable elastic capsules to create an artificial fluid with a multitude of stable states. We study, theoretically and experimentally, the suspension’s internal energy, equilibrium pressure-density relations and their stability for both adiabatic and isothermal processes. We show that the elastic multistability of the capsules endows the fluid with multistable thermodynamic properties, including the ability of capturing and storing energy at standard atmospheric conditions, not found in naturally available fluids.

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“…Figures 3(c) and (d) demonstrate the filed distributions while the source vibrates at the frequencies ω s a/2πc t = 0.207 and ω s a/2πc t = 0.276, respectively. Because of the tunnelling [34], more energy will leak out from the waveguide at high frequencies, where the absolute value of ρ y eff gets smaller.…”

mentioning

confidence: 99%

Controlling elastic waves with small phononic crystals containing rigid inclusions

Peng¹,

Qiu²,

Liu³

et al. 2014

EPL

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We show that a two-dimensional elastic phononic crystal comprising rigid cylinders in a solid matrix possesses a large complete band gap below a cut-off frequency. A mechanical model reveals that the band gap is induced by negative effective mass density, which is affirmed by an effective medium theory based on field averaging. We demonstrate, by two examples, that such elastic phononic crystals can be utilized to design small devices to control low-frequency elastic waves. One example is a waveguide made of a two-layer anisotropic elastic phononic crystal, which can guide and bend elastic waves with wavelengths much larger than the size of the waveguide. The other example is the enhanced elastic transmission of a single-layer elastic phononic crystal loaded with solid inclusions. The effective mass density and reciprocal of the modulus of the single-layer elastic phononic crystal are simultaneously near zero.

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Acoustic tunneling through artificial structures: From phononic crystals to acoustic metamaterials

Cited by 11 publications

References 25 publications

Multistable Metafluid based Energy Harvesting and Storage

Multistable Metafluid based Energy Harvesting and Storage

A metafluid with multistable density and internal energy states

Controlling elastic waves with small phononic crystals containing rigid inclusions

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