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Broadband cloak for water waves

WebBroadband Waveguide Cloak for Water Waves. Experimental setup for a broadband waveguide cloak for water waves. The parallel-plate waveguide is a water tank with two identical gradient index metamaterials along the sidewalls (white strips) and a wave maker at the far end. Selected for a Synopsis in Physics and an Editors’ Suggestion. WebJan 10, 2011 · Figure 1: The configuration of an acoustic cylindrical cloak for water waves. Cavities with large volume act as shunt capacitors, while narrow channels connecting …

Broadband surface-wave transformation cloak PNAS

WebAug 13, 2024 · The concept of a broadband cloak for water waves: (a) The schematic plot of the top view of the cloak device and three-dimensional sketch of GIMs. (b) The side view of the waveguide cloak with GIMs. (c) The experimental photographs of the … WebIn this article, we show experimentally that electrostriction allows to implement extensive refraction-based control of water waves in a precise and contactless manner. The setup consists of an electrode under high voltage placed above the grounded conductive water. The waves propagating under the electrode can be slowed down up to ... marigan bio extracts gmbh https://centrecomp.com

Shallow water theory for structured bathymetry - Royal Society

WebAug 16, 2024 · Inspired by electromagnetic waveguide cloaks with gradient index metamaterials, we fabricated a broadband cloak with simply a gradient depth profile on … WebOct 1, 2024 · The water-wave cloak is realized by inversely designing the height distribution of the cloaking shell. Complex refraction-diffraction interaction holistically offsets the … WebSep 10, 2024 · Active cloaking suppresses not only the scattered field arising from the direct wave propagating between the primary source and the scattering object but also that caused by the echoes from the boundary of the waveguide at later times (see fig. S1). mari from prison school

Shallow water theory for structured bathymetry - Royal Society

Category:Broadband cloaking of multiple truncated cylinders in water waves …

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Broadband cloak for water waves

National Center for Biotechnology Information

WebAug 8, 2016 · Here, we present the design of a perfect broadband cloak for flexural waves through the use of a nonlinear transformation, and by matching term-by-term the original …

Broadband cloak for water waves

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WebAug 13, 2024 · Here we propose a hydrodynamic metamaterial cloak that can conceal an object in two-dimensional creeping flow by guiding viscous forces. Coordinate transformation of fluidic space is implemented to calculate a tensoric viscosity based on a form invariance of Navier-Stokes equations. WebBroadband Waveguide Cloak for Water Waves Experimental setup for a broadband waveguide cloak for water waves. The parallel-plate waveguide is a water tank with …

WebThis transformation keeps the governing equation perfectly intact and, if the cloak is large enough, asymptotically satisfies the necessary boundary conditions. We show that with … WebJan 10, 2011 · We present here the first practical realization of a low-loss and broadband acoustic cloak for underwater ultrasound. This metamaterial cloak is constructed with …

WebThis acoustic cylindrical cloak is implemented by a 2D array of subwavelength cavities (a) (b) FIG. 1 (color online). Schematic diagram of the experimental setup. A burst of … WebMay 30, 2024 · Transient wave experiments are conducted with the cloak in a designed two-dimensional underwater waveguide system and proved excellent cloaking performance for an enclosed target over broadband frequencies 9–15 kHz. This finding paves the way for controlling underwater acoustics using the structured anisotropic modulus metafluid.

WebAug 14, 2024 · A new cloaking scheme could protect boats in harbours or ports from ocean waves. (Courtesy: S Curtis) A wave-damping scheme …

WebNational Center for Biotechnology Information naturally flyWebJun 7, 2024 · Farhat M, Enoch S, Guenneau S, Movchan AB (2008) Broadband cylindrical acoustic cloak for linear surface waves in a fluid. Phys Rev Lett 101:1345011. Article Google Scholar ... Chan CT (2005) Refraction of water waves by periodic cylinder arrays. Phys Rev Lett 95:154501. Article Google Scholar Li J, Pendry JB (2008) Hiding under … naturally for pets loginWebBroadband Acoustic Cloak for Ultrasound Waves Shu ... (λ is the wavelength in water at 60 kHz) respectively. Afterwards, the cylinder layers are evenly spaced with the distance equal to λ/10 along the ... To demonstrate the broadband nature of our designed cloak, the acoustic wave field distributions at 52 kHz and 64 kHz are presented in Fig ... mariga thoithiWebHere, we present experimental demonstration of broadband sharp bending of surface electromagnetic waves with almost ideal transmission, which allows “invisibility cloaking” of disorders, such as ultrasharp corners and bumps for surface electromagnetic waves. mariful kitchen knifeWebNov 8, 2024 · Generating plane waves for sonar systems is of high value due to their directive nature. In this paper, first, the unidirectional carpet cloak theory will be elaborated for converting arbitrary wavefronts to plane waves and collimating transmitted energy. Next, as an specific case study, converting cylindrical waves to plane waves will be … mariga net worthWebSep 1, 2014 · ‘Cloaking’ refers to the reduction in amplitude or complete elimination of the scattered waves. The possibility of cloaking is of both scientific and practical interests. Cloaking is considered here for a circular cylinder on the free surface, surrounded by one or more additional bodies. Linearized time-harmonic motion is assumed. marigat is in which countyWebWe introduce a class of cloaks capable of remarkable broadband surface electromagnetic waves guidance around ultrasharp corners and bumps with no perceptible changes in … naturally footless