Laboratory investigation of turbulent dissipation in an internal solitary wave breaking over a submerged Gaussian ridge

2021 ◽  
Vol 33 (9) ◽  
pp. 096602
Author(s):  
Ying-Tien Lin ◽  
Yuanye Luo ◽  
Junyang Yu ◽  
Jinbao Song ◽  
Yeping Yuan
Keyword(s):  
Solitary Wave ◽  
Laboratory Investigation ◽  
Wave Breaking ◽  
Internal Solitary Wave ◽  
Turbulent Dissipation

scholarly journals Classification of internal solitary wave breaking over a slope

2019 ◽  
Vol 4 (1) ◽  
Author(s):  
Keisuke Nakayama ◽  
Takahiro Sato ◽  
Kenji Shimizu ◽  
Leon Boegman
Keyword(s):  
Solitary Wave ◽  
Wave Breaking ◽  
Internal Solitary Wave

On the breaking of internal solitary waves at a ridge

2002 ◽  
Vol 469 ◽  
pp. 161-188 ◽  
Author(s):  
J. KRISTIAN SVEEN ◽  
YAKUN GUO ◽  
PETER A. DAVIES ◽  
JOHN GRUE
Keyword(s):  
Solitary Wave ◽  
Wave Breaking ◽  
Lower Layer ◽  
Fluid Layer ◽  
Fluid Velocity ◽  
Internal Solitary Wave ◽  
Layer Thickness Ratio ◽  
Transmitted Waves ◽  
Ridge Height ◽  
Experimental Laboratory

An experimental laboratory study has been carried out to investigate the propagation of an internal solitary wave of depression and its distortion by a bottom ridge in a two-layer stratified fluid system. Wave profiles, density fields and velocity fields have been measured at three reference locations, namely upstream, downstream and over the ridge. Experiments have been performed with wave amplitudes in the range 0.2– 1.9 times the depth of the upper layer, and a ratio between the lower and the upper layer in the range 3.0–8.5. The ridge slope was varied from 0.1 to 0.33 and the maximum ridge height was two-thirds of the thicker fluid layer. Over the ridge, the flow has been classified into: (i) cases when the bottom ridge has little influence on the propagation and spatial structure of the internal solitary wave, (ii) cases where the internal solitary wave is significantly distorted by the blocking effect of the ridge (though no wave breaking occurs), and (iii) cases for which the internal solitary wave is broken as it encounters and passes over the bottom ridge. A detailed description of the processes leading to wave breaking is given. Breaking has been found to take place when the fluid velocity in the lower layer exceeds 0.7 of a local nonlinear wave speed, defined at the top of the ridge. The breaking condition is also expressed in terms of the amplitude of the incident wave, the layer thickness ratio and the relative height of the ridge. The wave breaking can be determined from the input parameters of the experiment. The transmitted waves have been found to always consist of a leading pulse (solitary wave) followed by a dispersive wavetrain. The (solitary) wave amplitude is significantly reduced only when breaking takes place at the ridge. Internal waves of mode two are generated in cases with strong breaking.

Effect of pycnocline thickness on internal solitary wave breaking over a slope

2021 ◽  
Vol 230 ◽  
pp. 108884
Author(s):  
Keisuke Nakayama ◽  
Ryo Iwata ◽  
Tetsuya Shintani
Keyword(s):  
Solitary Wave ◽  
Wave Breaking ◽  
Internal Solitary Wave

scholarly journals Assessment of Numerical Methods for Plunging Breaking Wave Predictions

2021 ◽  
Vol 9 (3) ◽  
pp. 264
Author(s):  
Shanti Bhushan ◽  
Oumnia El Fajri ◽  
Graham Hubbard ◽  
Bradley Chambers ◽  
Christopher Kees
Keyword(s):  
Solitary Wave ◽  
Wave Breaking ◽  
Large Scale ◽  
Turbulence Models ◽  
Navier Stokes ◽  
Wave Crest ◽  
Breaking Wave ◽  
Rans Turbulence Models ◽  
Run Up ◽  
Better Than

This study evaluates the capability of Navier–Stokes solvers in predicting forward and backward plunging breaking, including assessment of the effect of grid resolution, turbulence model, and VoF, CLSVoF interface models on predictions. For this purpose, 2D simulations are performed for four test cases: dam break, solitary wave run up on a slope, flow over a submerged bump, and solitary wave over a submerged rectangular obstacle. Plunging wave breaking involves high wave crest, plunger formation, and splash up, followed by second plunger, and chaotic water motions. Coarser grids reasonably predict the wave breaking features, but finer grids are required for accurate prediction of the splash up events. However, instabilities are triggered at the air–water interface (primarily for the air flow) on very fine grids, which induces surface peel-off or kinks and roll-up of the plunger tips. Reynolds averaged Navier–Stokes (RANS) turbulence models result in high eddy-viscosity in the air–water region which decays the fluid momentum and adversely affects the predictions. Both VoF and CLSVoF methods predict the large-scale plunging breaking characteristics well; however, they vary in the prediction of the finer details. The CLSVoF solver predicts the splash-up event and secondary plunger better than the VoF solver; however, the latter predicts the plunger shape better than the former for the solitary wave run-up on a slope case.

Current field features and propagation characteristics of suspected internal solitary wave packet

2013 ◽  
Vol 72 ◽  
pp. 448-452 ◽  
Author(s):  
Yi Zheng ◽  
Daqi Xin ◽  
Shuxia Li ◽  
Guoquan Shi ◽  
Junxia Wei ◽  
...  
Keyword(s):  
Solitary Wave ◽  
Wave Packet ◽  
Internal Solitary Wave ◽  
Propagation Characteristics ◽  
Current Field
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