English  |  正體中文  |  简体中文  |  Items with full text/Total items : 28588/40619
Visitors : 4124662      Online Users : 51
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search

Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/39985

Title: Numerical study of water depth effect on vortex shedding
Authors: Shin-Jye Liang
Chung-Ru Ho
Contributors: 國立臺灣海洋大學:海洋環境資訊學系
Keywords: Shallow-water equations
vortex streets
least-squares finite-element method
θ − method
Date: 2008-11
Issue Date: 2017-01-11T06:59:25Z
Publisher: 第 30 屆海洋工程研討會論文集
Abstract: Abstract: The effect of bathymetry on the characteristics of vortex streets is numerically studied in this paper. The numerical model is based on the non-conservative, two-dimensional depth-averaged shallow-water equations with the least-squares finite-element formulation in space and the θ − method in time integration. Flow past a circular cylinder with the same boundary and initial conditions, in three different bathymetries, including the horizontal bed, constant slope bed, and irregular bed, is investigated. Water surface around the cylinder and the dynamics, such as the Strouhal number, of the vortex streets are examined. Computed results compared well with available experiment data and other numerical solutions. It shows that pairs of symmetric, alternatively cyclonic-anticyclonic vortices are found in the symmetric bathymetry setting, and highly asymmetric, alternating vortices with opposite rotations in the non-symmetric bathymetry setting. The bathymetry has a direct effect on the formation, strength, and characteristics of the vortex shedding, and consequently on the water surface around the cylinder and flow filed upstream.
Discover the world's research
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/39985
Appears in Collections:[海洋環境資訊系] 演講及研討會

Files in This Item:

File Description SizeFormat

All items in NTOUR are protected by copyright, with all rights reserved.


著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback