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Unsteady draining of a fluid from a circular tank

Forbes, L.K. and Hocking, G.C. (2010) Unsteady draining of a fluid from a circular tank. Applied Mathematical Modelling, 34 (12). pp. 3958-3975.

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    Link to Published Version: http://dx.doi.org/10.1016/j.apm.2010.03.032
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    Abstract

    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 The mean position of the interface moves downwards as time progresses, and eventually a portion of the interface is withdrawn into the drain.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.

    Publication Type: Journal Article
    Murdoch Affiliation: School of Mathematical and Physical Sciences
    Publisher: Elsevier BV
    Copyright: 2010 Elsevier
    URI: http://researchrepository.murdoch.edu.au/id/eprint/3062
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