National Taiwan Ocean University Institutional Repository:Item 987654321/50316
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题名: Interaction of nonlinear progressive viscous waves with a submerged obstacl
作者: Y.C.Sue
M.J.Chern
R.R.Hwang
贡献者: 國立臺灣海洋大學:系統工程暨造船學系
关键词: Viscous waves
Vortex shedding
Turbulent flows
Free surface flows
日期: 2005-02
上传时间: 2018-10-04
出版者: Ocean Engineering
摘要: Abstract: The present work is to establish a numerical model to investigate the interaction of a two-dimensional periodic progressive wave train over a submerged rectangular obstacle. We consider progressive wave motions in viscous fluids and solve the continuity and the Reynolds averaged Navier–Stokes equations directly. The two-equation k−ε turbulence model is employed to simulate the turbulent transport quantities and solve the free surface flow problem. Numerical results for the wave interaction with a submerged obstacle are obtained and compared with the existing experimental results. Good agreements are found in the water elevation and vortex patterns between numerical and experimental results. In addition, we look into the mechanism and the behavior of the nonlinear waves while interacting with the rectangular obstacle at high Reynolds number. We use the ratio of wave height to water depth to characterize the nonlinearity of incoming waves. Numerical results reveal that the vortices formed by an incoming wave train are highly dependent on the ratio of wave height to water depth. Results also show that highly nonlinear waves induce strong vortices around a submerged obstacle. The interacting effect of obstacle length on the flow is also discussed in the study. It has been observed that the vortex motion around the obstacle is enhanced as the length of the submerged obstacle decreases.
關聯: 32(8-9) pp.893-923
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50316
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