Coriolis and Rotational Effects on Stratified Turbulence EuHIT Funded Project

Team

Stephen Darby
University of Southampton, Southampton, United Kingdom
Robert Michael Dorrell
University of Leeds, Leeds, United Kingdom
Gareth Mark Keevil
University of Leeds, Leeds, United Kingdom
Joel Sommeria
Centre National de la Recherche Scientifique, Grenoble, France
Samuel Viboud
CNRS, Grenoble, France
Anna Wåhlin
Department of Marine Sciences, Gothenburg, Sweden
Mathew Graeme Wells
University of Toronto, Toronto, Canada

Overview

Research Infrastructure
CORIOLIS Rotating Platform, France
Facilities used
Coriolis Rotating Platform (Coriolis)
Project leader
Jeffrey Peakall
University of Leeds, Leeds, United Kingdom

Abstract

Dense buoyancy-driven flows in channels are the main transport pathway between shallow slope regions and the deep sea. In higher latitudes these stratified flows are known to be strongly affected by Coriolis forces, however, the influence of these rotational forces on turbulent energy production and dissipation, shear stress distribution, and entrainment is largely unknown. A series of experiments will be carried out at the Coriolis platform to investigate the influence of Coriolis forces on turbulence in straight and sinuous submarine channels with non-erodible (fixed) beds. Work will focus on the turbulence structure of the bottom boundary layer, the presence and nature of Ekman boundary layers, mixing and entrainment at the gravity current - ambient interface, and the redistribution of turbulence within the flow as a result of three-dimensional bend flow. Subsequent runs will examine experiments with erodible mobile-beds to assess the coupling between turbulence and channel morphodynamics.