Propagation of longitudinal acoustic waves in a thin cylindrical pipe filled with a liquid
| Autor: | S. L. Bazhenov, Al. Al. Berlin, A. K. Rogozinskii |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Physical acoustics
Materials science Capillary action Wave propagation Acoustics Computational Mechanics Acoustic interferometer General Physics and Astronomy Acoustic wave Condensed Matter::Soft Condensed Matter Physics::Fluid Dynamics Boundary layer Viscosity Mechanics of Materials Composite material Longitudinal wave |
| Zdroj: | Doklady Physics. 46:418-421 |
| ISSN: | 1562-6903 1028-3358 |
| DOI: | 10.1134/1.1384939 |
| Popis: | In [2, 3], the effect of reducing the wave velocity was found for elastic rods made in the form of a thin strip or fiber and immersed in a liquid. A reduction of the velocity is observed only in thin samples with a thickness on the order of a hundred microns. The effect found is caused by the fact that the so-called boundary layer of a liquid vibrates together with the rod. The thickness of this layer depends on the vibration frequency and the density and viscosity of the liquid. When the sound velocity depends on the viscosity, the effect discovered is employed for the determination of the viscosity of liquids. An advantage of this method is its ability to provide high-rate measurements, which makes it possible to control the chemical reactions with a time-dependent viscosity that proceed in liquids. As a sensor, we used metallic strips and fibers with a diameter of approximately 0.1 mm [2, 3], which were immersed in the liquid under investigation. The use, for this purpose, of a thin capillary filled with the liquid presents a number of advantages, among them the possibility of operating with a very small quantity (specified by the capillary volume) of liquid. The problem of the effect of liquid on the propagation of sound in a thin pipe (capillary) has not yet been solved. The goal of this study is to theoretically seek a solution to this problem. |
| Databáze: | OpenAIRE |
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