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Title: Numerical simulations of a line plume impinging on a ceiling in cold fresh water
Authors: George, Alabodite M.
Kay, Anthony
Keywords: Buoyancy reversal
Impinging plume
Numerical simulation
Gravity current
Issue Date: 2017
Publisher: © Elsevier
Citation: GEORGE, A.M. and KAY, A., 2017. Numerical simulations of a line plume impinging on a ceiling in cold fresh water. International Journal of Heat and Mass Transfer, 108, part B pp. 1364-1373.
Abstract: Laminar plumes from a line source of warm water at the base of a shallow, homogeneous body of cold water (below the temperature of maximum density) were simulated by a computational model. The plume water undergoes buoyancy reversal as it mixes with the cold ambient. If this occurs before the plume has reached the ceiling of the domain, the plume flaps from side to side. Otherwise, it spreads along the ceiling and then sinks, with a vortex enclosed between the rising plume and the sinking flow. Some of the dense, mixed water from the sinking flow is re-entrained into the rising plume, while the rest flows outwards along the floor. However, with high source temperatures, a sufficient volume of warm water eventually builds up to also form a positively buoyant gravity current along the ceiling.
Description: This paper is embargoed until 21st January 2018.
Sponsor: AMG gratefully acknowledges the funding for his PhD studies (of which this work forms part) provided by Niger Delta University, Bayelsa State, Nigeria.
Version: Accepted for publication
DOI: 10.1016/j.ijheatmasstransfer.2017.01.016
URI: https://dspace.lboro.ac.uk/2134/23914
Publisher Link: http://dx.doi.org/10.1016/j.ijheatmasstransfer.2017.01.016
Appears in Collections:Closed Access (Maths)

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