Acoustic Detection of Microstructure and Internal Waves in the Stratified Flow

被引：0

作者：

Prokhorov, V. E. ^{[1
]}

机构：

[1] A Ishlinsky Inst Problems Mech RAS, Moscow 119526, Russia

来源：

IUTAM SYMPOSIUM ON WAVES IN FLUIDS: EFFECTS OF NONLINEARITY, ROTATION, STRATIFICATION AND DISSIPATION | 2013年 / 8卷

关键词：

stratification; buoyancy; wake; microstructure; internal wave; sound; backscattering; shadowgraph; spectrum; oscillation;

D O I：

10.1016/j.piutam.2013.04.024

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Experimental study of the large-and micro-scale structure in the salt stratified flow is carried out using optical (schlieren) and acoustical (backscattering) techniques. Juxtaposition of the processed shadowgraphs with backscattering profiles reveals the scattering objects which are represented by fine scale elements of the flow - continuous density wake and microstructure formed by the multi-strip and volume micro-scale objects. Spectral processing of the backscattering data discovers characteristic frequencies of the oscillations in the wake interior. Some of the frequencies may be associated with internal waves; others are the results of harmonics formed due to square-law detection peculiar to backscattering method. (C) 2013 The Authors. Published by Elsevier B.V.

引用

页码：186 / 195

页数：10

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