Theoretical, field and experimental study on internal wave dynamics in rotating stratified basins

2010 ◽  
pp. 83-88
Keyword(s):  
Experimental Study ◽  
Internal Wave ◽  
Wave Dynamics

Numerical Studies of Internal Wave Dynamics

1997 ◽  
Author(s):  
George F. Carnevale ◽  
M. C. Hendershott
Keyword(s):  
Internal Wave ◽  
Wave Dynamics ◽  
Numerical Studies

On the irreversibility of internal-wave dynamics due to wave trapping by mean flow inhomogeneities. Part 1. Local analysis

1993 ◽  
Vol 251 ◽  
pp. 21-53 ◽  
Author(s):  
Sergei I. Badulin ◽  
Victor I. Shrira
Keyword(s):  
Shear Flow ◽  
Internal Wave ◽  
Wave Field ◽  
Large Scale ◽  
Spatial Scales ◽  
Energy Concentration ◽  
Local Analysis ◽  
Mean Flow ◽  
Wave Trapping ◽  
Wave Dynamics

The propagation of guided internal waves on non-uniform large-scale flows of arbitrary geometry is studied within the framework of linear inviscid theory in the WKB-approximation. Our study is based on a set of Hamiltonian ray equations, with the Hamiltonian being determined from the Taylor-Goldstein boundary-value problem for a stratified shear flow. Attention is focused on the fundamental fact that the generic smooth non-uniformities of the large-scale flow result in specific singularities of the Hamiltonian. Interpreting wave packets as particles with momenta equal to their wave vectors moving in a certain force field, one can consider these singularities as infinitely deep potential holes acting quite similarly to the ‘black holes’ of astrophysics. It is shown that the particles fall for infinitely long time, each into its own ‘black hole‘. In terms of a particular wave packet this falling implies infinite growth with time of the wavenumber and the amplitude, as well as wave motion focusing at a certain depth. For internal-wave-field dynamics this provides a robust mechanism of a very specific conservative and moreover Hamiltonian irreversibility.This phenomenon was previously studied for the simplest model of the flow non-uniformity, parallel shear flow (Badulin, Shrira & Tsimring 1985), where the term ‘trapping’ for it was introduced and the basic features were established. In the present paper we study the case of arbitrary flow geometry. Our main conclusion is that although the wave dynamics in the general case is incomparably more complicated, the phenomenon persists and retains its most fundamental features. Qualitatively new features appear as well, namely, the possibility of three-dimensional wave focusing and of ‘non-dispersive’ focusing. In terms of the particle analogy, the latter means that a certain group of particles fall into the same hole.These results indicate a robust tendency of the wave field towards an irreversible transformation into small spatial scales, due to the presence of large-scale flows and towards considerable wave energy concentration in narrow spatial zones.

scholarly journals AN EXPERIMENTAL STUDY ON NONLINEAR WAVE DYNAMICS: ROUGE WAVE GENERATION AND WAVE BLOCKING

2014 ◽  
Vol 1 (34) ◽  
pp. 34
Author(s):  
Wen-Yang Hsu ◽  
Igor Shugan ◽  
Wen-Son Chiang ◽  
Ray-Yeng Yang ◽  
Hwung-Hweng Hwung ◽  
...  
Keyword(s):  
Experimental Study ◽  
Nonlinear Wave ◽  
Wave Generation ◽  
Wave Dynamics ◽  
Wave Blocking ◽  
Rouge Wave

Experimental Study of the Internal Wave Damping on Small-Scale Turbulence

1996 ◽  
Vol 26 (3) ◽  
pp. 398-405 ◽  
Author(s):  
L. A. Ostrovsky ◽  
V. I. Kazakov ◽  
P. A. Matusov ◽  
D. V. Zaborskikh
Keyword(s):  
Experimental Study ◽  
Internal Wave ◽  
Small Scale ◽  
Wave Damping ◽  
Scale Turbulence

Experimental Study of Ship Internal Waves—The Supersonic Case

1993 ◽  
Vol 115 (1) ◽  
pp. 16-22 ◽  
Author(s):  
H. Ma ◽  
M. P. Tulin
Keyword(s):  
Experimental Study ◽  
Internal Wave ◽  
Wave Field ◽  
Experimental Method ◽  
Internal Waves ◽  
Measured Data ◽  
Density Distributions ◽  
Wave Patterns ◽  
Wave Profiles ◽  
Theoretical Results

Internal waves produced by a ship traveling faster than the fastest internal waves (supersonic case) were investigated experimentally in our laboratory in a wide tank using averaging conductivity wave gages developed for this investigation. The wave gage is similar to the conductivity probe, but has space-averaging electrodes. An array of seven such gages was used in a wave tank with dimensions 12 ft length, 8 ft width, 2 ft depth. The water in the tank was stratified with salt to obtain desired density distributions. A spheroid, split vertically, was towed against and along a sidewall to simulate a moving ship. Simultaneous wave profiles at various distances normal to the track of the ship were obtained for different Froude numbers and density distributions. The internal wave patterns were calculated from the measured data and compared with theoretical results. The amplitude on the first crest of the internal wave field is also plotted against the distance from the ship, and a limited comparison with theory is made. The experimental method developed for this study is sensitive, simple and reliable. It may serve to obtain a data base for ship-generated internal waves under a variety of conditions.

scholarly journals Experimental study of internal wave generation by convection in water

2015 ◽  
Vol 47 (4) ◽  
pp. 045502 ◽  
Author(s):  
Michael Le Bars ◽  
Daniel Lecoanet ◽  
Stéphane Perrard ◽  
Adolfo Ribeiro ◽  
Laetitia Rodet ◽  
...  
Keyword(s):  
Experimental Study ◽  
Internal Wave ◽  
Wave Generation ◽  
Internal Wave Generation
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