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Content archived on 2024-06-11

Comparative Analysis and Rationalization of Second-Moment Turbulence Models

Objective



Today a wealth of microstructure observations have been made in the open ocean, on the shelf and in estuaries. Simultaneously high-resolution numerical experiments on different realistic flow configurations with Direct Numerical Simulations (DNS) of turbulence and Large Eddy Simulation (LES) are increasing in number at a fast rate. More and more turbulence closures are being implemented in numerical circulation models with second-moment closure (SMC) schemes playing the role of workhorses in most cases. Except for a few papers authored by CAlRTUM Partners, most of them still in print, no organized attempt has been made to bring microstructure observations, closure models and direct numerical simulations together. Hence, one would think that significant progress in the representation of small-scale processes in circulation models could be gained from systematic comparisons of the above methods.

Furthermore, for modellers there exists an urgent need to compare their results with laboratory experiments, especially for stratified flows, because at present some classical SMC schemes are in clear contradiction to laboratory observations. Consequently, CARTUM sets out to meet the challenge to merge theoretical aspects, new field observations, laboratory measurements, and computer-generated data sets with computational and numerical considerations with the ultimate goal of significantly improving second-moment closure models. CARTUM aims at bringing together the critical mass of unresolved problems, diverse but pertinent datasets, and a host of scientists ranging from world-leading experts in the field of marine turbulence to younger researchers with specific experience.

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CON - Coordination of research actions

Coordinator

UNIVERSITY OF HAMBURG
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Address
Troplowitzstrasse 7
22529 HAMBURG
Germany

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