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Unsteady draining of a fluid from a circular tank


Forbes, LK and Hocking, GC, Unsteady draining of a fluid from a circular tank, Applied Mathematical Modelling, 34, (12) pp. 3958-3975. ISSN 0307-904X (2010) [Refereed Article]

DOI: doi:10.1016/j.apm.2010.03.032


Three-dimensional draining flow of a two-fluid system from a circular tank is considered. The two fluids are inviscid and incompressible, and are separated by a sharp interface. There is a circular hole positioned centrally in the bottom of the tank, so that the flow is axially symmetric. The mean position of the interface moves downwards as time progresses, and eventually a portion of the interface is withdrawn into the drain. For narrow drain holes of small radius, the interface above the centre of the drain is pulled down towards the hole. However, for drains of larger radius the portion of the interface above the drain edge is drawn down first, rather than the central section. Non-linear results are obtained with a novel spectral technique, and are also compared against the predictions of linearized theory. Unstable Rayleigh-Taylor type flows, in which the upper fluid is heavier than the lower one, are also discussed. © 2010 Elsevier Inc.

Item Details

Item Type:Refereed Article
Research Division:Mathematical Sciences
Research Group:Applied mathematics
Research Field:Theoretical and applied mechanics
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the mathematical sciences
UTAS Author:Forbes, LK (Professor Larry Forbes)
ID Code:64878
Year Published:2010
Web of Science® Times Cited:3
Deposited By:Mathematics and Physics
Deposited On:2010-09-09
Last Modified:2015-01-27

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