Low‐frequency reverberation signal in shallow water in presence of internal waves

2004 ◽  
Vol 115 (5) ◽  
pp. 2551-2551
Author(s):  
Boris Katsnelson ◽  
Sergey Pereselkov ◽  
Valery Petnikov
Keyword(s):  
Shallow Water ◽  
Internal Waves ◽  
Low Frequency

The coherence of low-frequency sound in shallow water in the presence of internal waves

2014 ◽  
Vol 60 (1) ◽  
pp. 61-71 ◽  
Author(s):  
A. A. Lunkov ◽  
V. G. Petnikov
Keyword(s):  
Shallow Water ◽  
Internal Waves ◽  
Low Frequency ◽  
Frequency Sound

Phase fluctuations and horizontal refraction of low‐frequency sound signals in shallow water in presence of internal waves.

2008 ◽  
Vol 124 (4) ◽  
pp. 2443-2443
Author(s):  
Mohsen Badiey ◽  
Jing Luo ◽  
Boris Katsnelson ◽  
Alexander Tskhoidze ◽  
James Lynch ◽  
...  
Keyword(s):  
Shallow Water ◽  
Internal Waves ◽  
Low Frequency ◽  
Phase Fluctuations ◽  
Frequency Sound ◽  
Horizontal Refraction

Low-Frequency Acoustic Propagation Through Crossing Internal Waves in Shallow Water

2020 ◽  
Vol 28 (03) ◽  
pp. 1950013
Author(s):  
Alexey Shmelev ◽  
Ying-Tsong Lin ◽  
James Lynch
Keyword(s):  
Internal Wave ◽  
Shallow Water ◽  
Internal Waves ◽  
Three Dimensional ◽  
Low Frequency ◽  
Acoustic Energy ◽  
Full Field ◽  
Wave Trains ◽  
Acoustic Ducts ◽  
Numerical Approaches

Crossing internal wave trains are commonly observed in continental shelf shallow water. In this paper, we study the effects of crossing internal wave structures on three-dimensional acoustic ducts with both theoretical and numerical approaches. We show that, depending on the crossing angle, acoustic energy, which is trapped laterally between internal waves of one train, can be either scattered, cross-ducted or reflected by the internal waves in the crossing train. We describe the governing physics of these effects and illustrate them for selected internal wave scenarios using full-field numerical simulations.

Low-frequency bottom reverberation in shallow-water ocean regions

2004 ◽  
Vol 50 (1) ◽  
pp. 37-45 ◽  
Author(s):  
V. A. Grigor’ev ◽  
V. M. Kuz’kin ◽  
B. G. Petnikov
Keyword(s):  
Shallow Water ◽  
Low Frequency

A multi-layer model for nonlinear internal wave propagation in shallow water

2012 ◽  
Vol 695 ◽  
pp. 341-365 ◽  
Author(s):  
Philip L.-F. Liu ◽  
Xiaoming Wang
Keyword(s):  
Wave Propagation ◽  
Internal Wave ◽  
Shallow Water ◽  
Internal Waves ◽  
Bottom Topography ◽  
Laboratory Data ◽  
Constant Density ◽  
Layer Model ◽  
Fluid System ◽  
Nonlinear Internal Wave

AbstractIn this paper, a multi-layer model is developed for the purpose of studying nonlinear internal wave propagation in shallow water. The methodology employed in constructing the multi-layer model is similar to that used in deriving Boussinesq-type equations for surface gravity waves. It can also be viewed as an extension of the two-layer model developed by Choi & Camassa. The multi-layer model approximates the continuous density stratification by an $N$-layer fluid system in which a constant density is assumed in each layer. This allows the model to investigate higher-mode internal waves. Furthermore, the model is capable of simulating large-amplitude internal waves up to the breaking point. However, the model is limited by the assumption that the total water depth is shallow in comparison with the wavelength of interest. Furthermore, the vertical vorticity must vanish, while the horizontal vorticity components are weak. Numerical examples for strongly nonlinear waves are compared with laboratory data and other numerical studies in a two-layer fluid system. Good agreement is observed. The generation and propagation of mode-1 and mode-2 internal waves and their interactions with bottom topography are also investigated.

scholarly journals Low‐frequency bottom scattering strengths for a shallow water site in the Gulf of Mexico

1993 ◽  
Vol 93 (4) ◽  
pp. 2395-2395
Author(s):  
Peter G. Cable ◽  
Theo Kooij ◽  
Mike Steele
Keyword(s):  
Gulf Of Mexico ◽  
Shallow Water ◽  
Low Frequency
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