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STAMP SIGNED

Stratified turbulence and mixing processes

Total Cost €

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EC-Contrib. €

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Partnership

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Project "STAMP" data sheet

The following table provides information about the project.

Coordinator
THE CHANCELLOR MASTERS AND SCHOLARSOF THE UNIVERSITY OF CAMBRIDGE 

Organization address
address: TRINITY LANE THE OLD SCHOOLS
city: CAMBRIDGE
postcode: CB2 1TN
website: www.cam.ac.uk

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country United Kingdom [UK]
 Total cost 2˙283˙955 €
 EC max contribution 2˙283˙955 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2016-ADG
 Funding Scheme ERC-ADG
 Starting year 2017
 Duration (year-month-day) from 2017-10-01   to  2022-09-30

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    THE CHANCELLOR MASTERS AND SCHOLARSOF THE UNIVERSITY OF CAMBRIDGE UK (CAMBRIDGE) coordinator 2˙283˙955.00

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 Project objective

We propose to study turbulence and mixing in stably stratified fluid. Mixing is central to a wide range of questions from the heat uptake in the global ocean, the transport and dilution of pollutants in the atmosphere, the efficient cooling of buildings, to the homogenising of products in the food industry. However, the mechanisms that are responsible and their physical and dynamical aspects are largely unknown, and it is not possible to predict mixing rates from a knowledge of the overall flow and density fields.

We have invented a new laboratory experiment that produces a maintained stratified shear flow in parameter ranges directly applicable to the situations described above. The experiment, consisting of a two-layer counterflow in a stratified inclined duct, is easy to use and highly flexible. A rich variety of flows from transitional, to spatial and temporal intermittent flow, to fully turbulent flow are obtained, and can be maintained for long times to explore the life-cycles of the turbulence.

We have also developed a unique capability to make near-instantaneous, highly spatially resolved, measurements of all three components of velocity and the density field over a volume. This capability allows, for the first time in a laboratory experiment, measurements of all the quantities of interest over a three-dimensional region.

In addition we have a computational code with which we will carry out direct numerical simulations (DNS) of the experiments over a limited region of parameter space. We will use data from the experiments as initial conditions for the DNS, and compare the time evolution of the flow in the computations and the experiments. We will then use the experiments to extrapolate the results to the full scale.

This study, using the new experiment and diagnostics and state-of-the-art computations, will provide new insights into the dynamics of stratified turbulence and set the standard for future studies of this problem.

 Publications

year authors and title journal last update
List of publications.
2019 Adrien Lefauve, J. L. Partridge, P. F. Linden
Regime transitions and energetics of sustained stratified shear flows
published pages: 657-698, ISSN: 0022-1120, DOI: 10.1017/jfm.2019.488
Journal of Fluid Mechanics 875 2020-01-21

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