Fluctuations in Low‐Frequency Acoustic Propagation in the Ocean

1968 ◽  
Vol 43 (4) ◽  
pp. 716-722 ◽  
Author(s):  
R. H. Nichols ◽  
H. J. Young
Keyword(s):  
Low Frequency ◽  
Acoustic Propagation

scholarly journals Observations of low-frequency, long-range acoustic propagation in the Philippine Sea and comparisons with mode transport theory

2020 ◽  
Vol 147 (2) ◽  
pp. 877-897
Author(s):  
Tarun K. Chandrayadula ◽  
Sivaselvi Periyasamy ◽  
John A. Colosi ◽  
Peter F. Worcester ◽  
Matthew A. Dzieciuch ◽  
...  
Keyword(s):  
Long Range ◽  
Transport Theory ◽  
Low Frequency ◽  
Acoustic Propagation ◽  
Philippine Sea

Azimuthal variation of low-frequency acoustic propagation through asymmetric Gulf Stream eddies

1991 ◽  
Vol 89 (5) ◽  
pp. 2157-2167 ◽  
Author(s):  
Leonard E. Mellberg ◽  
Allan R. Robinson ◽  
George Botseas
Keyword(s):  
Gulf Stream ◽  
Low Frequency ◽  
Acoustic Propagation ◽  
Azimuthal Variation

STABILITY OF ACOUSTIC PROPAGATION IN 2D DUCT FLOWS: A LOW FREQUENCY APPROACH

2011 ◽  
Vol 21 (05) ◽  
pp. 1121-1151 ◽  
Author(s):  
A.-S. BONNET-BEN DHIA ◽  
M. DURUFLE ◽  
P. JOLY ◽  
L. JOUBERT
Keyword(s):  
Laminar Flow ◽  
Acoustic Waves ◽  
Normal Operator ◽  
Low Frequency ◽  
Acoustic Propagation ◽  
Compressible Fluids ◽  
Well Posedness ◽  
Hydrodynamic Instabilities ◽  
Limit Model

In this paper, we derive a simplified "quasi-1D" limit model for the propagation of low frequency acoustic waves in a laminar flow filling a 2D duct. We analyze the well-posedness of this model in function of the Mach profile of the flow. This can be reduced to the study of the spectrum of a bounded non-normal operator. As a by-product of this analysis, we establish new results for hydrodynamic instabilities of Kelvin–Helmholtz type in compressible fluids.

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