Numerical investigation of wake-collapse internal waves generated by a submerged moving body
| Autor: | Jianjun Liang, Weigen Huang, Tao Du, Ming-Xia He |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
010504 meteorology & atmospheric sciences Baroclinity Acoustics Stratification (water) Wake Internal wave Oceanography Critical value 01 natural sciences 010305 fluids & plasmas Amplitude Surface wave 0103 physical sciences Waveform 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Chinese Journal of Oceanology and Limnology. 35:967-977 |
| ISSN: | 1993-5005 0254-4059 |
| Popis: | The state-of-the-art OpenFOAM technology is used to develop a numerical model that can be devoted to numerically investigating wake-collapse internal waves generated by a submerged moving body. The model incorporates body geometry, propeller forcing, and stratification magnitude of seawater. The generation mechanism and wave properties are discussed based on model results. It was found that the generation of the wave and its properties depend greatly on the body speed. Only when that speed exceeds some critical value, between 1.5 and 4.5 m/s, can the moving body generate wake-collapse internal waves, and with increases of this speed, the time of generation advances and wave amplitude increases. The generated wake-collapse internal waves are confirmed to have characteristics of the second baroclinic mode. As the body speed increases, wave amplitude and length increase and its waveform tends to take on a regular sinusoidal shape. For three linearly temperature-stratified profiles examined, the weaker the stratification, the stronger the wake-collapse internal wave. |
| Databáze: | OpenAIRE |
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