固液界面处声波的非线性特性。

Nonlinearity of acoustic waves at solid-liquid interfaces.

作者信息

Glorieux Christ, Van de Rostyne Kris, Gusev Vitalyi, Gao Weimin, Lauriks Walter, Thoen Jan

机构信息

Laboratorium voor Akoestiek en Thermische Fysica, Departement Natuurkunde, Katholieke Universiteit Leuven, Belgium.

出版信息

J Acoust Soc Am. 2002 Jan;111(1 Pt 1):95-103. doi: 10.1121/1.1420388.

DOI:10.1121/1.1420388

PMID:11831827

Abstract

The small-amplitude and finite-amplitude propagation characteristics of laser line source excited and laser detected Scholte waves are investigated. Acoustic waves with Mach numbers up to 0.054 are observed at the interface between water and glass. In our case of a hard solid-liquid interface, the Scholte wave propagates very much like a bulk wave, for which the simple-wave equation holds. The experimental results are well fitted with this model, extended with an attenuation term. An anomalously large (compared with low amplitude viscous effects) attenuation reveals possible leakage of energy from the Scholte wave to bulk waves, through a mechanism of nonlinear mixing between the different wave modes and viscosity induced turbulence.

摘要

研究了激光线源激发和激光探测的肖尔特波的小振幅和有限振幅传播特性。在水和玻璃的界面处观测到马赫数高达0.054的声波。在我们所研究的硬固液界面情况下，肖尔特波的传播非常类似于体波，对此简单波方程成立。实验结果与该模型拟合良好，该模型通过一个衰减项进行了扩展。与低振幅粘性效应相比异常大的衰减表明，通过不同波模之间的非线性混合和粘性诱导湍流机制，肖尔特波可能会有能量泄漏到体波中。