Internal gravity wave radiation into weakly stratified fluid

1997 ◽  
Vol 23 (7) ◽  
pp. 114
Keyword(s):  
Gravity Wave ◽  
Internal Gravity Wave ◽  
Stratified Fluid ◽  
Wave Radiation

On parametric instabilities of finite-amplitude internal gravity waves

1982 ◽  
Vol 119 ◽  
pp. 367-377 ◽  
Author(s):  
J. Klostermeyer
Keyword(s):  
Gravity Wave ◽  
Internal Gravity Wave ◽  
Maximum Growth ◽  
Numerical Approach ◽  
Internal Gravity Waves ◽  
Resonant Interaction ◽  
Finite Amplitude ◽  
Interaction Diagram ◽  
Parametric Instabilities ◽  
Boussinesq Fluid

The equations describing parametric instabilities of a finite-amplitude internal gravity wave in an inviscid Boussinesq fluid are studied numerically. By improving the numerical approach, discarding the concept of spurious roots and considering the whole range of directions of the Floquet vector, Mied's work is generalized to its full complexity. In the limit of large disturbance wavenumbers, the unstable disturbances propagate in the directions of the two infinite curve segments of the related resonant-interaction diagram. They can therefore be classified into two families which are characterized by special propagation directions. At high wavenumbers the maximum growth rates converge to limits which do not depend on the direction of the Floquet vector. The limits are different for both families; the disturbance waves propagating at the smaller angle to the basic gravity wave grow at the larger rate.

Gravity wave patterns in the wake of a sphere in a stratified fluid

1991 ◽  
pp. 489-503 ◽  
Author(s):  
J. M. Chomaz ◽  
P. Bonneton ◽  
A. Butet ◽  
E. J. Hopfinger ◽  
M. Perrier
Keyword(s):  
Gravity Wave ◽  
Stratified Fluid ◽  
Wave Patterns
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