scholarly journals Nonlinear interaction of an acoustic wave and mean flow at a stagnation point (model verification)

1988 ◽  
Vol 84 (S1) ◽  
pp. S9-S9
Author(s):  
Charles Thompson ◽  
Martin Manley
Keyword(s):  
Acoustic Wave ◽  
Stagnation Point ◽  
Nonlinear Interaction ◽  
Model Verification ◽  
Mean Flow ◽  
Point Model

Theoretical and experimental study on the acoustic wave energy after the nonlinear interaction of acoustic waves in aqueous media

2015 ◽  
Vol 29 (4) ◽  
pp. 611-621 ◽  
Author(s):  
Chao-feng Lan ◽  
Feng-chen Li ◽  
Huan Chen ◽  
Di Lu ◽  
De-sen Yang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Acoustic Wave ◽  
Wave Energy ◽  
Nonlinear Interaction ◽  
Acoustic Waves ◽  
Aqueous Media

On the interaction of an internal wavepacket with its induced mean flow and the role of streaming

2018 ◽  
Vol 838 ◽  
Author(s):  
Boyu Fan ◽  
T. Kataoka ◽  
T. R. Akylas
Keyword(s):  
Nonlinear Interaction ◽  
Laboratory Experiments ◽  
Modulation Instability ◽  
Three Dimensional ◽  
Mean Flow ◽  
Interaction Dynamics ◽  
Dimensional Gravity ◽  
Combined Action ◽  
Beam Bending

The coupled nonlinear interaction of three-dimensional gravity–inertia internal wavepackets, in the form of beams with nearly monochromatic profile, with their induced mean flow is discussed. Unlike general three-dimensional wavepackets, such modulated nearly monochromatic beams are not susceptible to modulation instability from their inviscid, purely modulation-induced mean flow. However, streaming – the induced mean flow associated with the production of mean potential vorticity via the combined action of dissipation and nonlinearity – can cause cross-beam bending, transverse broadening and increased along-beam decay of the beam profile, in qualitative agreement with earlier laboratory experiments. For wavepackets with general three-dimensional modulations, by contrast, streaming does arise, but plays a less prominent role in the interaction dynamics.

Nonlinear Interaction of Acoustical Waves Due to Cracks and Its Possible Usage for Cracks Detection

1995 ◽  
Vol 1 (3) ◽  
pp. 335-344 ◽  
Author(s):  
V. Yu. Zaitsev ◽  
A.M. Sutin ◽  
I. Yu. Belyaeva ◽  
V.E. Nazarov
Keyword(s):  
Acoustic Wave ◽  
Nonlinear Interaction ◽  
Crack Detection ◽  
Wave Amplitude ◽  
Acoustic Pulse ◽  
Transmitted Wave ◽  
New Method ◽  
Nonlinear Properties ◽  
Reflected Wave ◽  
Crack Type

An interaction of a CW acoustic wave and a powerful acoustic pulse due to nonlinear properties of a crack-type discontinuity in a solid is considered. Characteristics of nonstationary variations of the reflected wave amplitude and the phase of the transmitted wave, which are induced by the powerful pulse, are determined. The effects should allow one to distinguish cracks from other scatterers and can be used as a base of a new method of crack detection and positioning. Demonstrative signal estimates based on two simplified crack models are presented.

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