Numerical Studies on the Interactions of Surface Waves and a Submerged Plane Jet
碩士 === 國立成功大學 === 工程科學系 === 89 === A numerical scheme was developed to solve the unsteady, two-dimensional Navier-Stokes equations and the exact free surface boundary conditions for simulating the interactions of surface waves and a submerged plane jet. The incident waves were generated by a numeri...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2001
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| Online Access: | http://ndltd.ncl.edu.tw/handle/84775440837693102503 |
| Summary: | 碩士 === 國立成功大學 === 工程科學系 === 89 === A numerical scheme was developed to solve the unsteady, two-dimensional Navier-Stokes equations and the exact free surface boundary conditions for simulating the interactions of surface waves and a submerged plane jet. The incident waves were generated by a numerical wavemaker set up in the computational domain. The main characteristics of the flow field were discussed by specifying the instantaneous velocity fields. The time history of the water elevation was shown for discussing the wave transformation. The velocity profile of the jet at different height has also been shown for observing the trajectory of jet flow. The numerical results showed that a non-symmetric vortex-pair exists at the left- and right hand sides of the jet. These vortices become flatter with respect to time. Due to the effect of the incident waves, the jet flow oscillates back and forth. This phenomenon becomes more apparent as the Ursell number of the wave increases. The cross-sectional velocity profiles of jet flow under intermediate water wave show two-peak patterns.
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