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Lookup NU author(s): Professor Longbin Tao
Viscous flow around an oscillating vertical cylinder with a disk attached at keel is studied in detail by direct numerical simulation based on finite difference method. Over the range of flow parameters investigated, viz. Keulegan–Carpenter number (KC) from 7.5 x 10^ to 0.75 and b = 1.585 x 10^5; three shedding modes were observed. These modes, named independent, interactive and uni-directional, are found to be governed by both flow parameters (KC, b) and the geometry of the disk, such as aspect ratio, td/Dd: The mechanism for the initial condition dependence of the asymmetric uni-directional vortex shedding is analyzed. The effects of KC number and aspect ratio of the disk on the vortex shedding angle are also presented.
Author(s): Tao L, Thiagarajan K
Publication type: Article
Publication status: Published
Journal: Applied Ocean Research
Year: 2003
Volume: 25
Issue: 1
Pages: 21-35
Print publication date: 01/02/2003
Date deposited: 16/06/2010
ISSN (print): 0141-1187
ISSN (electronic): 1879-1549
Publisher: Pergamon
URL: http://dx.doi.org/10.1016/S0141-1187(03)00031-2
DOI: 10.1016/S0141-1187(03)00031-2
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