Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/75093
Title: Unsteady wake-source model for flow past an oscillating body
Authors: Wond, S.C.
Chew, Y.T. 
Low, H.T. 
Tan, K.T.
Issue Date: 1993
Citation: Wond, S.C.,Chew, Y.T.,Low, H.T.,Tan, K.T. (1993). Unsteady wake-source model for flow past an oscillating body. Proceedings of the Third (1993) International Offshore and Polar Engineering Conference : 431-435. ScholarBank@NUS Repository.
Abstract: A potential-flow model of flow past an oscillating body with separated wake is developed based on the Parkinson and Jandall's wake-source model for steady flow. The results show that Morison's equation is in some cases a satisfactory model in the study of unsteady bluff body aerodynamics. The two-dimensional incompressible potential-flow model simulates the effect of flow separation in unsteady flow by placing surface sources, with time-dependent strengths ad angular positions on the rear wetted surface of the body, and downstream sinks to form a closed wake model in the transformed plane. The unsteady Bernoulli equation is used to obtain the time-dependent pressure distributions over the front wetted surface, from which the in-line force coefficients are obtained through integration. The in-line force equation obtained from the present model is shown to comprise of uncoupled drag and inertia terms.
Source Title: Proceedings of the Third (1993) International Offshore and Polar Engineering Conference
URI: http://scholarbank.nus.edu.sg/handle/10635/75093
ISBN: 1880653087
Appears in Collections:Staff Publications

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