ERCOFTAC/SIG 42

8th Workshop on Synthetic Turbulence Models

 28th - 29th June 2012, Paris, France

Synthetic turbulence, clustering and fractal geometry

 

Université Pierre et Marie Curie, Institut Jean le Rond d'Alembert, Paris, France




Organizers

Dr T. Michelitsch
Institut Jean le Rond d'Alembert, Université Pierre et Marie Curie, Paris, France
michel@lmm.jussieu.fr
Pr D. Queiros Conde
LEME, Université Paris Ouest Nanterre La Défense , Ville d'Avray, France
 Dr F. Nicolleau
F.Nicolleau@sheffield.ac.uk
University of Sheffield, Sheffield Fluid Mechanics, SFMG - Department of Mechanical Engineering, Sheffield, United Kingdom
 Dr A. Nowakowski
A.F.Nowakowski@sheffield.ac.uk
University of Sheffield, Sheffield Fluid Mechanics, SFMG - Department of Mechanical Engineering, Sheffield, United Kingdom

Aims of the workshop: 
- This workshop is the 8th workshop held by the ERCFOFTAC  Special Interest Group on Synthetic Turbulence Models. It follows those held 
· 29th-30th May 2007, The University of Sheffield, UK ERCOFTAC bulletin 75, 2007 
· 29th-30th November 2007 UPC, Vilanova i la Geltru, Spain ERCOFTAC bulletin 77, 2008 
· 3th-4th July 2008 The University of Newcastle, UK ERCOFTAC bulletin 79, 2009 
· 11th-12th December 2008 Nancy-Université; France ERCOFTAC bulletin 79, 2009 
· 1st-3rd July 2009 Warsaw University of Technology, Poland ERCOFTAC bulletin 81, 2009 
· 15th-6th July 2010Ecole Centrale de Lyon, France ERCOFTAC bulletin 85, 2011 
· 22nd-23rd Sept 2011Imperial College, London, UK  ERCOFTAC bulletin 89, 2011

Workshop Program: 

Preliminary talks, please contact the organiser if you would like to give a talk
 & programme: 

A. Baggaley, University of Glasgow, UK M. Bestehorn, University of Cottbus, Germany Dynamic Surface Patterns of Thin Liquid Films C. Cambon, Laboratoire de Mécanique des Fluides et d'Acoustique École Centrale de Lyon, France Phase coherence in the statistical approach to quasi-homogeneous turbulence with interactions W. Brevis, University of Sheffield, Sheffield Fluid Mechanics Group, Department of Civil and Structural Engineering, UK I. Eames, University College, London, UK M. Farhan, F. Nicolleau and A. F. Nowakowski, Sheffield Fluid Mechanics Group, University of Sheffield, UK Clustering of laden particles in Kinematic Simulation flows
S. Girimaji, Texas A&M University College Station, USA
Synthetic turbulence with Langevin Equations


M. Jensen, Niels Bohr Institute, Copenhagen, Denmark

T. Michelitsch, Université Pierre et Marie Curie, Institut Jean le Rond d'Alembert, Paris, France
A simple model for Levi flights in n dimensions


F. Nicolleau and A. F. Nowakowski, Sheffield Fluid Mechanics Group, University of Sheffield, UK
Return to axi-symmetry for synthetically generated pipe flows

D. Queiros Conde, Laboratoire Energétique Mécanique Electromagnétisme, Université Paris Ouest La Défense, Ville d'Avray, France
A generalized scale-entropy diffusion equation to describe turbulent flames near a wall

E. Meneguz and M. W. Reeks, School of Mechanical and Systems Engineering, University of Newcastle, UK
Segregation of particles in incompressible random flows: singularities, intermittency and random uncorrelated motion

Jose M. Redondo, Roberto Castilla and Teresa Vila, Fisica Aplicada, UPC, Pan European Laboratory on non-homogeneous Turbulence, LAB-ERCOFTAC, Spain
Intermittent Turbulent Mixing in Fractal non-homogeneous flows

Audience:

This workshop will be the eighth on synthetic turbulence organised by ERCOFTAC/SIG 42. It is open to anyone interested in flow modelling and/or "synthetic turbulence" including (but not restricted to) Kinematic Simulation, (KS hereinafter).
More fundamental talks on particle dispersion in turbulent flows are also welcome.

Motivation:

KS is widely used in various domains, including Lagrangian aspects in turbulence mixing/stirring, particle dispersion/clustering, and last but not least, aeroacoustics. Flow realisations with complete spatial, and sometime spatio-temporal, dependency, are generated via superposition of random modes (mostly spatial, and sometime spatial and temporal, Fourier modes), with prescribed constraints such as: strict incompressibility (divergence-free velocity field at each point), high Reynolds energy spectrum, ... Recent improvements consisted in incorporating linear dynamics, for instance in rotating and/or stably-stratified flows, with possible easy generalisation to MHD flows, and perhaps to plasmas. KS for channel flows have also been validated.
However, the absence of "sweeping effects" in present conventional KS versions is identified as a major drawback in very different applications: inertial particle clustering as well as in aeroacoustics. Nevertheless, this issue was addressed in some reference papers, and merits to be revisited in the light of new studies in progress.

A further goal of this workshop is to bring people from different disciplines together. In particular recent emerging fractal approaches have the potential to provide the framework for the construction of new synthetic turbulent flows. Interdisciplinary contributors are especially invited to contribute in the workshop.

A non-exhaustive list of related topics can be proposed as follows:
- improvement of the modelling of small scales advection by largest scales (sweeping),
- introduction of strongly anisotropic energy spectra with better randomization of the wave-vector,
- analogy with initialisation of DNS/LES and with "Particle Representation Models",
- use of specific modes consistent with geometric constraints, e.g. solid walls, instead of 3D spatial Fourier modes,
- improvement of KS as a subgrid model for LES :Lagrangian diffusion and aeroacoustics,
- competition between "wavy" (really spatio-temporal, propagating) and "vortical" structures of the velocity field for organizing Lagrangian turbulence diffusion, from fluid to plasma turbulence,
- other "synthetic" models, e.g. to afford intermittency, possibly very different from conventional KS.

Participants (preliminary):

A. Baggaley, University of Glasgow, UK
M. Bestehorn, University of Cottbus, Germany
A. Ballil, University of Sheffield, Sheffield Fluid Mechanics Group, UK
F. Bouras, Laboratoire de Physique Energétique Appliquée, Université El Oued, Algérie
W. Brevis, University of Sheffield, Sheffield Fluid Mechanics Group, Department of Civil and Structural Engineering, UK
C. Cambon, Ecole Centrale de Lyon, France
I. Eames, University College London, UK
M. Farhan, University of Sheffield, Sheffield Fluid Mechanics Group, UK
S. Girimaji, Texas A&M University College Station, USA
M. Gorokhovski, Ecole Centrale de Lyon, France
M. Jensen, Niels Bohr Institute, Copenhagen, Denmark
S. Jolgam, University of Sheffield, Sheffield Fluid Mechanics Group, UK
G. Maugin, Université Pierre et Marie Curie, Institut Jean le Rond d'Alembert, Paris, France
T. Michelitsch, Université Pierre et Marie Curie, Institut Jean le Rond d'Alembert, Paris, France
F.C.G.A. Nicolleau, University of Sheffield, Sheffield Fluid Mechanics Group, UK
A. F. Nowakowski, University of Sheffield, Sheffield Fluid Mechanics Group, UK
D. Queiros Conde, Université Paris Ouest Nanterre la Défense, LEME, Ville d'Avray, France
M. Reeks, University of Newcastle, UK
J.M. Redondo, Fisica Aplicada UPC, Spain
....

Please contact the organisers if you would like to attend/give a presentation:

Few grants may be available from Ercoftac for young researchers, please contact organisers for more information



Location



The conference will be held at Institut Jean le Rond d'Alembert,
Université Pierre et Marie Curie, Paris, France

4, Place Jussieu 75252 Paris Cedex 05 Métro Jussieu par la ligne (10) ou (7).

By bus: lignes 63, 67, 86, 87, 89.
ou l'itinéraire touristique: Métro ligne 5 ou RER C Gare d'Austerlitz, puis traverser le jardin des plantes
http://www.dalembert.upmc.fr/ijlrda/index.php?option=com_content&task=view&id=15&Itemid=41&limit=1&limitstart=1
Map here

IJLRA is in-between tower 55 and 65. The conference room is 311 on the 3rd floor