Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/54677
Title: A numerical study of the effect of free surface and water depth on the stability of wakes: Use of GDQ formulation
Authors: Zhang, Q.D.
Khoo, B.C. 
Yeo, K.S. 
Keywords: Free surface
GDQ method
Instability
Wake flow
Issue Date: 15-Jun-1997
Source: Zhang, Q.D.,Khoo, B.C.,Yeo, K.S. (1997-06-15). A numerical study of the effect of free surface and water depth on the stability of wakes: Use of GDQ formulation. International Journal for Numerical Methods in Fluids 24 (11) : 1079-1090. ScholarBank@NUS Repository.
Abstract: The instability character of a wake in the presence of a free surface is examined by a recently developed GDQ (generalized differential quadrature) numerical method. It is shown that at low Froude number the wake near a free surface is convectively unstable, but when the Froude number is increased further it becomes absolutely unstable. The effect of water depth on the stability property of the wake flow is also investigated. It is found that the influence of water depth on the critical point of instability is limited to at most 20% variation in the complex frequency, while the change in temporal growth rate is also limited to about 20%. © 1997 by John Wiley & Sons, Ltd.
Source Title: International Journal for Numerical Methods in Fluids
URI: http://scholarbank.nus.edu.sg/handle/10635/54677
ISSN: 02712091
Appears in Collections:Staff Publications

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