Reduction of internal-solitary-wave-induced forces on a circular cylinder with a splitter plate

2018 ◽  
Vol 83 ◽  
pp. 119-132 ◽  
Author(s):  
Ling-ling Wang ◽  
Jin Xu ◽  
Yin Wang ◽  
Gang Wei ◽  
Chang Lin ◽  
...  
Keyword(s):  
Circular Cylinder ◽  
Solitary Wave ◽  
Splitter Plate ◽  
Internal Solitary Wave ◽  
Wave Induced

Internal solitary wave-induced flow over a corrugated bed

2010 ◽  
Vol 60 (4) ◽  
pp. 1007-1025 ◽  
Author(s):  
Magda Carr ◽  
Marek Stastna ◽  
Peter A. Davies
Keyword(s):  
Solitary Wave ◽  
Internal Solitary Wave ◽  
Induced Flow ◽  
Wave Induced

Observation of dynamic fine structure in ocean using pre-stack seismic data

2020 ◽  
Author(s):  
Yi Gong ◽  
Haibin Song ◽  
Wenhao Fan ◽  
Yongxian Guan ◽  
Kun Zhang
Keyword(s):  
Fine Structure ◽  
Solitary Wave ◽  
Flow Velocity ◽  
Seismic Data ◽  
Internal Solitary Wave ◽  
Reflection Seismic ◽  
Water Region ◽  
The Common ◽  
Induced Velocity ◽  
Wave Induced

<p>We propose a method for observing the dynamic thermohaline fine structure using pre-stack seismic data, and combine it with PIV(Particle-Image-Velocimetry) technology to obtain a series of vertical two-dimensional flow velocity sections.<br>Because of the redundancy of the multi-channel reflection seismic data, the reflection seismic structure at the same location can be observed multiple times from pre-stack seismic data. First, we extract the common-midpoint gathers (CMPs) from the multi-channel reflection seismic data. Then extract the common-offset gathers (COGs) from CMPs. Finally, a seismic processing sequence, such as noise attenuation, normal move out (NMO), velocity analysis and migration, is applied for imaging the reflection structure in COG sections. These COG sections with different offsets are the images of the thermohaline fine structure of seawater at different times. We apply this method to study a typical internal solitary wave in the Dongsha plateau of the South China Sea. We find that the waveform of the internal solitary wave(ISW) in shallow water region does not change much during propagation, but the front becomes flatter and the rear becomes steeper in deep water region, so there is a ISW shoaling change vertically. <br>We apply the PIV technique to the COG pre-stack migrated sections and calculate the flow velocity sections of the internal solitary wave. To verify the correctness of the flow velocity sections, we compare it with the theoretical flow velocity section calculated from the KdV equation. It is found that the two sections are consistent in flow directions, and the PIV result shows the structure of wave induced velocity well. In the PIV calculation results, the average value of the velocity in the horizontal direction is 1.7 m/s, and in the vertical direction is 0.3 m/s. This result is larger than the theory, especially the horizontal velocity. We speculate that the horizontal velocity contains not only the wave induced velocity component of the internal solitary wave but also the phase velocity component.<br>In summary, we use pre-stack seismic data to observe changes in the thermohaline fine structure during the propagation of internal solitary waves, and find that the waveforms of internal solitary waves vary differently at different depths. We use the PIV technique to calculate the flow velocity section of the internal solitary wave and compare it with the theoretical results. We find that our method is feasible to describe the flow velocity qualitatively, but it needs further improvement in quantitative description. This method has great potential in studying the dynamic evolution of mesoscale or submesoscale ocean processes.</p>

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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