Motion of microscopic grains in a periodic potential of plate acoustic waves

2003 ◽  
Vol 15 (43) ◽  
pp. 7201-7211 ◽  
Author(s):  
A M Gorb ◽  
A B Nadtochii ◽  
O A Korotchenkov
Keyword(s):  
Acoustic Waves ◽  
Periodic Potential ◽  
Plate Acoustic Waves

scholarly journals Integrated piezoelectric plate acoustic waves transducers

2008 ◽  
Vol 44 (12) ◽  
pp. 776 ◽  
Author(s):  
K.-T. Wu ◽  
C.-K. Jen ◽  
M. Kobayashi
Keyword(s):  
Acoustic Waves ◽  
Piezoelectric Plate ◽  
Plate Acoustic Waves

Destabilization of a vortex by acoustic waves

2000 ◽  
Vol 414 ◽  
pp. 315-337 ◽  
Author(s):  
STÉPHANE LEBLANC
Keyword(s):  
Stability Analysis ◽  
Vortex Core ◽  
Acoustic Waves ◽  
Periodic Potential ◽  
Three Dimensional ◽  
Basic Flow ◽  
Almost Periodic ◽  
The Core ◽  
Parametric Resonances ◽  
Time Periodic

The linear stability of a circular vortex interacting with two plane acoustic waves propagating in opposite directions is investigated. When the wavelength is large compared to the size of the vortex, the core is subjected to time-periodic compressions and strains. A stability analysis is performed with the geometrical optics approximation, which considers short-wavelength perturbations evolving along the trajectories of the basic flow. On the vortex core, the problem is reduced to a single Hill–Schrödinger equation with periodic or almost-periodic potential, the solution to which grows exponentially when parametric resonances occur. On interacting with the acoustic waves, the circular vortex is thus unstable to three-dimensional perturbations.

Higher-order Lamb waves with quasi-zero surface displacement components on a GaAs piezoelectric plate

2021 ◽  
Author(s):  
Muhammad Hamidullah ◽  
Céline Elie-Caille ◽  
Therese Leblois
Keyword(s):  
Acoustic Waves ◽  
Lamb Waves ◽  
Surface Displacement ◽  
Displacement Component ◽  
Higher Order ◽  
Acoustic Energy ◽  
Bulk Acoustic Wave ◽  
Integrated Sensor ◽  
Total Displacement ◽  
Plate Acoustic Waves

Abstract Higher-order Lamb waves with quasi-zero surface displacement components are reported on (100)-cut GaAs propagating along the <110> direction where the total displacement at the surface of the plate is less than 10% of the maximum total displacement. The dispersion curves and the displacement component profiles show the reduction of total displacement at the surface of the plate starting when the phase velocities of the higher-order modes are crossing the shear bulk acoustic wave velocity to the value as low as 5%. Due to the concentration of acoustic energy inside the plate, the reported quasi-zero plate acoustic waves (QZ-PAW) further reduce the radiation of acoustic when the plate surface is in contact with liquid. The experimental results validate the occurrence of QZ-PAW with a reduction of viscous damping insertion loss compared to previously reported quasi-longitudinal Lamb waves (QL-LW). The results demonstrate the potential QZ-PAW mode for emerging applications such as dual-mode PAW sensors, PAW devices with integrated sensor and actuator, thin-film and ultra-high frequency (UHF) PAW sensors in highly viscous liquid media.

Noncontact determination of thin films conductance by SH0 plate acoustic waves

2014 ◽  
Vol 115 (4) ◽  
pp. 044504 ◽  
Author(s):  
I. E. Kuznetsova ◽  
B. D. Zaitsev ◽  
V. I. Anisimkin ◽  
A. A. Teplykh ◽  
A. M. Shikhabudinov ◽  
...  
Keyword(s):  
Thin Films ◽  
Acoustic Waves ◽  
Plate Acoustic Waves

scholarly journals Development of electrode structure for acoustic delay lines by using inject printing method

2019 ◽  
Vol 30 ◽  
pp. 07005
Author(s):  
Andrey Smirnov ◽  
Iren Kuznetsova ◽  
Vladimir Anisimkin ◽  
Vladimir Kolesov
Keyword(s):  
Coupling Coefficient ◽  
Acoustic Waves ◽  
Delay Lines ◽  
Electrode Structure ◽  
Mechanical Coupling ◽  
Structure Characteristics ◽  
Plate Acoustic Waves ◽  
Printing Method

The results concerning to study of possibility to produce electrode structure of acoustic delay lines by using inject printing method are presented. The investigation of morphologic and structure characteristics of electrode structure produced has been carried out. The possibility of excitation of plate acoustic waves characterized by high value of electro-mechanical coupling coefficient by such acoustic delay lines has been demonstrated.

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