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Turbulent thermohaline hydraulic jumps

Published online by Cambridge University Press:  03 November 2021

Raouf Emile Baddour Open the ORCID record for Raouf Emile Baddour [Opens in a new window]
Raouf Emile Baddour*
Affiliation:
Department of Civil & Environmental Engineering, University of Western Ontario, London, Ontario, N6A 5B9 Canada
*
† Email address for correspondence: [email protected]
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Abstract

Turbulent entrainment properties of thermohaline internal hydraulic jumps in quiescent ambient water are investigated. Underflow and overflow jumps are considered. The study is mainly concerned with thermohaline buoyancy effects on flow development. The thermohaline buoyancy is determined from a seawater equation of state, which is nonlinear in temperature and linear in salinity, and is accurate throughout the range of temperature and salinity of interest (T = 0 to 40 °C and S = 0 to 40 ppt). The results indicate that thermohaline buoyancy produces smaller less diluted underflow jumps and larger more diluted overflow jumps. These nonlinear buoyancy effects are particularly significant when buoyancy arising from temperature and salinity act in opposite directions. Hydraulic controls by vertical and/or horizontal constrictions downstream reveal, using a matching technique, unique stationary miscible jump solutions.

JFM classification

Waves/Free-surface Flows: Hydraulics Turbulent Flows: Stratified turbulence Geophysical and Geological Flows: Hydraulic control
Type
JFM Papers
Information
Journal of Fluid Mechanics , Volume 930 , 10 January 2022 , A5
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Copyright
© The Author(s), 2021. Published by Cambridge University Press

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