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Acoustic Wave - Springer Nature

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Last Updated: 04 November 2022

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Recent Developments in Surface Acoustic Wave (SAW) Sensors and Their Applications in Different Areas

The film made from metal oxide semiconductor semiconductors also has high thermal and chemical stability; one example is ZnO, which can be used to film SAW sensors for detecting various types of gases. The use of pulsed laser deposition for depositeding porous films has increased the ability of SAW sensors to detect various gases at very low concentrations. Examples are TiO_2 and bilayer films of Pd/TiO_2 and bilayer films of Pd/TiO_2 and bilayer films of Pd/TiO_2 deposited on quartz substrates of SAW sensors. When porous gold layers are used in place of a conventional dense gold layer, a significant improvement in the sensing properties is observed. High-temperature SAW sensor can be used today, and it offers a high temperature with good stability. SAW sensors come in a variety of applications, ranging from detection of small gas molecules to large bio-molecules, or even complete cell structures.

Source link: https://doi.org/10.1007/978-981-19-2468-2_22


Focussing Acoustic Waves with Intent to Control Biofouling in Water Pipes

Industry companies that require water from infested sources have been plagued by the colonization of water pipes by macro-fouling organisms like barnacles and mussels. Mechanical interruptions impede the applicability of acoustic techniques to this problem, particularly because of the achievable range of guided waves in the fluid or pipe wall, which devolve with distance from the actuation position. A fluid-filled pipe is modelled arithmetically as a 2D rigid walled duct. The input waveform is created by filtering and time-reversing the impulse response so as to account for dispersion, thereby compressing the signal in time and space. Peak pressures can be obtained that are more than a order of magnitude higher than those obtained by harmonic excitation, according to simulations. Waves in a 3D pipe with fluid-structure coupling will be modelled by future experiments, with fluid-structure coupling being used for experimental validation.

Source link: https://doi.org/10.1007/978-3-031-15758-5_109


Self-focusing of laser-driven ion acoustic waves in plasma with axial density ramp

In detail, the effect of the laser beam's propagation characteristics on self-focusing of IAW has been investigated. The laser beam excites an IAW at frequency 0̆3c9_ia u03c9 ia due to plasma's optical nonlinearity, and is nonlinearly coupled to the laser beam during its propagation across the plasma, and becomes nonlinearly coupled to the laser beam.

Source link: https://doi.org/10.1007/s12596-022-00955-4


Analysis of Love-type acoustic wave in a functionally graded piezomagnetic plate sandwiched between elastic layers

The aim of this research paper is to investigate the phase velocity of a surface acoustic Love-type wave in a layer of functionally graded piezomagnetic material sandwiched between a thin layer of heterogeneous fiber-reinforced fabric and a heterogeneous elastic substrate. Mechanically imperfect interfaces between the FGPM layer and the elastic layer/substrate are extremely variable. The material properties of the piezomagnetic layer and elastic substrate are expected to change in a quadratic way as with the building's depth. Mechanical displacement components for each layer and magnetic potential for the piezomagnetic layer can be obtained by solving linear mechanical/coupled magneto-mechanical field equations.

Source link: https://doi.org/10.1007/s00707-022-03299-z


Modeling of a Resonator Filter Based on Surface Acoustic Waves: Comparison of Different Approaches

Based on the numerical analysis of infinite test structures in the COMSOL, the parameters necessary for the model of coupled modes are established. Practical recommendations on modeling resonator filters with different topological designs are developed, as well as the possibility of accounting for various secondary effects in modeling are considered.

Source link: https://doi.org/10.1134/S1064226922110055


A mesh-free finite-difference scheme for frequency-domain acoustic wave simulation with topography

With the increasing complexity of seismic exploration methods, numerical simulation techniques that can accurately identify topographical surfaces and intricate geological structures are becoming increasingly important. We also include the mesh-free numerical simulation of the perfectly matched layer absorbent boundary condition, and we compare the results of the simplified PML, the classical PML, and the more complex frequency-shifted PML methods in suppressing boundary reflections. To further demonstrate its efficiency, the suggested numerical simulation software is applied to the Marmousi model and field data with topography.

Source link: https://doi.org/10.1007/s11770-022-0981-z


Propagation and Head-On Collision of Dust Acoustic Waves in Collisional Dusty Plasma: the Saturn Main Rings

Considering unmagnetized collisional dusty plasma containing negatively charged dust grains, Maxwellian electrons, inertial positively charged ions, and immobile neutral particles, the propagation characteristics and the consequences of head-on collision of dust acoustic waves are investigated. The Saturn rings' compressive and rarefactive dust acoustic solitons are manufactured according to the solitons' plasma conditions. With the increase of ion density, the negative phase shift increases, while the negative phase shift decreases with increasing the number of charged dust grains.

Source link: https://doi.org/10.1007/s13538-022-01192-7

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions