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Ideal planar fluid flow over a submerged obstacle: Review and extension

Forbes, L.K., Walters, S.J. and Hocking, G.C.ORCID: 0000-0002-5812-6015 (2021) Ideal planar fluid flow over a submerged obstacle: Review and extension. The ANZIAM Journal, 63 (4). pp. 377-419.

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A classical problem in free-surface hydrodynamics concerns flow in a channel, when an obstacle is placed on the bottom. Steady-state flows exist and may adopt one of three possible configurations, depending on the fluid speed and the obstacle height; perhaps the best known has an apparently uniform flow upstream of the obstacle, followed by a semiinfinite train of downstream gravity waves. When time-dependent behaviour is taken into account, it is found that conditions upstream of the obstacle are more complicated, however, and can include a train of upstream-advancing solitons. This paper gives a critical overview of these concepts, and also presents a new semianalytical spectral method for the numerical description of unsteady behaviour.

Item Type: Journal Article
Murdoch Affiliation(s): Mathematics, Statistics, Chemistry and Physics
Publisher: Cambridge University Press on behalf of Australian Mathematical Publishing Association Inc.
Copyright: © The Author(s), 2021
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