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Fluid mechanical stirring and mixing: the lagrangian approach

Objective

Fluid flows enhance dramatically the transport of mixing of contaminants, tracers and particles. Understanding and controlling the dispersion of various species in a flow is a major objective for many important industrial and natural applications. The difficulty of the problem comes from the intricate nature of the underlying fluid flow, which involves many length scales, and from the lack of precise experimental knowledge about the motion of fluid particles. The field of turbulence, in particular in relation to mixing, has been recently the subject of very substantial progress. The development of new theoretical concepts, as well as of innovative experimental techniques permitting to follow tracers of fluid particles with a high resolution, open new prospects for the understanding of fundamental properties of tracer dispersion. The participants of the network have a unique expertise, and will pursue the investigation of fundamental studies in turbulent dispersion. The acquisition and the analysis of trajectories of individual tracer particles will lead to a completely new situation in this field. The results will be confronted to the results of theoretical and numerical studies. We are planning to apply the resulting insight to the crucial problem of modeling. In particular, we expect that the results should allow us to improve the numerous ad-hoc approximations used in models. We are planning to investigate in detail configurations of environmental interest, such as dispersion in seas or in the atmosphere, as well as of engineering relevance, such as mixing near a wall. New models will be tested in these demanding problems.

Funding Scheme

NET - Research network contracts

Coordinator

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
Address
Route De Lucioles 1361
06560 Valbonne
France

Participants (12)

CORNEIL UNIVERSITY
United States
Address
511 Clark Hall
14853-2501 Ithaca/new York
DELFT UNIVERSITY OF TECHNOLOGY
Netherlands
Address
Leeghwaterstraat 21
2628 BL Delft
ECOLE NORMALE SUPERIEURE
France
Address
Rue Lhomond 24
75231 Paris
EINDHOVEN UNIVERSITY OF TECHNOLOGY
Netherlands
Address
Den Dolech 2
5600 MB Eindhoven
IMPERIAL COLLEGE OF SCIENCE, TECHNOLOGY AND MEDICINE
United Kingdom
Address
Prince Consort Road
SW7 2BY London
NATIONAL RESEARCH COUNCIL OF ITALY
Italy
Address
Via P. Gobetti 101
40129 Bologna
UNIVERSIDAD POLITECNICA DE MADRID
Spain
Address
3,Plaza Cardenal Cisneros 3 Ciudad Universitaria
28040 Madrid
UNIVERSITE DE NICE - SOPHIA ANTIPOLIS
France
Address
Route Des Lucioles 1361
06560 Valbonne
UNIVERSITY OF COPENHAGEN
Denmark
Address
Blegdamsvej, 17
2100 Koepenhagen
UNIVERSITY OF HELSINKI
Finland
Address
15,Yliopistonkatu 5
00014 Helsinki
UNIVERSITY OF ROME "LA SAPIENZA"
Italy
Address
Piazzale Aldo Moro 2-5
00185 Roma
WEIZMANN INSTITUTE OF SCIENCE
Israel
Address
Herzel Street 2
76100 Rehovot