Coomaraswamy, I. A. and Caulfield, C. P. (2011) Time-Dependent Ventilation Flows Driven by Opposing Wind and Buoyancy. Journal of Fluid Mechanics, 672. pp. 33-59. DOI https://doi.org/10.1017/S0022112010005847
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Abstract
We consider transient flow in a box containing an isolated buoyancy source, ventilated by a windward high-level opening and a leeward low-level opening, so that prevailing wind acts to oppose buoyancy-driven flow. Hunt & Linden (J. Fluid Mech., vol. 527, 2005, p. 27) demonstrated that two stable steady states can exist above a critical wind strength: buoyancy-driven displacement ventilation with a two-layer stratification and wind-driven mixing ventilation with the whole interior contaminated by buoyant fluid. We present two time-dependent models for this system: a nonlinear ordinary differential equation (ODE) model following Kaye & Hunt (J. Fluid Mech., vol. 520, 2004, p. 135), assuming ‘perfect’ vertical mixing of fluid within each layer, and a partial differential equation model assuming zero vertical mixing, following Germeles (J. Fluid Mech., vol. 71, 1975, p. 601).
Item Type: | Article |
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Uncontrolled Keywords: | 2011AREP; IA62; BPI; |
Subjects: | 99 - Other |
Divisions: | 99 - Other |
Journal or Publication Title: | Journal of Fluid Mechanics |
Volume: | 672 |
Page Range: | pp. 33-59 |
Identification Number: | https://doi.org/10.1017/S0022112010005847 |
Depositing User: | Sarah Humbert |
Date Deposited: | 04 Nov 2011 18:55 |
Last Modified: | 23 Jul 2013 10:02 |
URI: | http://eprints.esc.cam.ac.uk/id/eprint/2232 |
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