ERCOFTAC/SIG 42

 

6th Workshop on Synthetic Turbulence Models

 5th-7th July 2010, Lyon (or 5th-6th depending on the number of presentations)

 Synthetic models and environment

 

LMFA, Ecole Centrale de Lyon - Henri Bénard pilot Centre

Ecully, Lyon, France

 

 

 

Co-organizer (local): F. Godeferd
 
Fabien.Godeferd@ec-lyon.fr
Ecole Centrale de Lyon, LMFA, 
36 avenue Guy de Collongue - BP 163, 
69131, Ecully CEDEX, France
 
Co-organizer (local): C. Cambon 
 
Claude.Cambon@ec-lyon.fr
Ecole Centrale de Lyon, LMFA, 
36 avenue Guy de Collongue - BP 163, 
69131, Ecully CEDEX, France
 
Co-organizer: F. Nicolleau
F.Nicolleau@sheffield.ac.uk
University of Sheffield, Sheffield Fluid Mechanics,  Department of Mechanical Engineering
Mappin Street
Sheffield S1 3JD, United Kingdoms
 
Co-organizer: A. Nowakowski
A.F.Nowakowski@sheffield.ac.uk
University of Sheffield, Sheffield Fluid Mechanics, Department of Mechanical Engineering
Mappin Street
Sheffield S1 3JD, United Kingdom
 
 

                  

Aims of the workshop

 

- This workshop is the 6th  workshop held by the ERCFOFTAC

  Special Interest Group on Synthetic Turbulence Models. It follows those held 

            29th-30th May, 2007                    The University of Sheffield

ERCOFTAC bulletin 75, 2007

            29th-30th November, 2007           UPC, Vilanova i la Geltru
ERCOFTAC bulletin 77, 2008

            3th-4th July 2008                        The University of Newcastle, UK
ERCOFTAC bulletin 79, 2009

               11th-12th December 2008            Nancy
ERCOFTAC bulletin 79, 2009

            1st-3rd July 2009                        Warsaw
ERCOFTAC bulletin 81, 2009


 

 

Workshop Program:

 

Preliminary talks:

 

J.-R. Angilella, Nancy-Université, LAEGO, France

Dust trapping in inviscid vortex pairs

 

A. Baggaley, University of Newcastle upon Tyne, UK

TBA

 

G. Coleman, University of Southampton, School of Engineering Sciences, UK

DNS of turbulent wakes and rings

 

V. Dallas, Imperial College, London

TBA

 

S. Katsanis. Sheffield Fluid Mechanics, University of Sheffield, UK

TBC

 

E. Meneguz, University of Newcastle upon Tyne, School of Mechanical & Systems Engineering, UK

TBA

 

T. Michelitsch, Université Pierre et Marie Curie, Institut Jean le Rond d'Alembert, Paris, France

Wave propagation in scale free media - Propagation d'ondes dans les milieux sans echelle

 

A. Naso, Laboratoire de Physique, Ecole Normale Supérieure de Lyon, France

Statistical mechanics of Beltrami flows in axisymmetric geometry

 

F. Nicolleau, Sheffield Fluid Mechanics, University of Sheffield, UK

Richardson's law and the sweeping problem in KS

 

A. F. Nowakowski, Sheffield Fluid Mechanics, University of Sheffield, UK

TBA

 

B. Oesterlé, Université de Lorraine, UHP, LEMTA-CNRS, Nancy, France

Monte-Carlo simulation of pair dispersion and clustering of inertial particles in turbulence

 

R. Perkins, LMFA, Ecole Centrale de Lyon, France

TBA

 

A. Pieri, LMFA, Ecole Centrale de Lyon, France

TBA

 

A. Pumir, Laboratoire de Physique, Ecole Normale Supérieure de Lyon, France

Collision of inertial particles in kinematic simulations : quantifying the sling effect ?

 

D. Queiros-Conde, Génie Thermique, Université de Paris XII, Ville d'Avray, France

TBA

 

J.M. Redondo, A. Matulka and P. Fraunie*, Fisica Aplicada UPC, Spain

The use of multifractal analysis on laboratory experiments and ocean observations of vorticity and scalar tracers

 

M. Reeks, University of Newcastle upon Tyne, School of Mechanical & Systems Engineering, UK

Lagrangian approach to droplet condensation in clouds using kinematic simulation of turbulence

 

N. Rimbert, LEMTA UMR CNRS 7563, ESSTIN College of Engineering, Nancy University, France

Simple model for turbulence intermittencies based on self-avoiding random vortex stretching

 

J. C. Vassilicos, Imperial College, London

kinematic simulation of turbulent channel flow

 

F. Zhang, M. Reeks and M. Kissane, University of Newcastle upon Tyne,  UK, Institut de Radioprotection et de Sûreté Nucléaire, St-Paul-Lez-Durance, France

Particle Resuspension Modeling in Turbulent Flows

 

 

 

Audience:
This workshop will be the sixth on synthetic turbulence organised by ERCOFTAC/SIG 42

It is open to anyone interested in environmental 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.

The workshop will also welcome people from the COST action on "Particles in Turbulence" following last meeting in Rome 18-19 December 2009.

 

 

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. The present workshop will investigate the use of  KS and other synthetic turbulence models for the particular application to environmental flows.

 

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):

 

J.-R. Angilella,                                     Nancy-Université, LAEGO, France

A. Baggaley,                                        University of Newcastle upon Tyne, UK

M. Bouznif ,                                        Mécanique des Fluides, Faculté des Sciences de Tunis, Tunisie

C. Cambon                                        Ecole Centrale de Lyon, France

S. B Chin,                                            University of Sheffield, Sheffield Fluid Mechanics Group, UK

G. Coleman,                                         University of Southampton, School of Engineering Sciences, UK

F. Godeferd,                                         Ecole Centrale de Lyon, France

S. Katsanis,                                          University of Sheffield, Sheffield Fluid Mechanics Group, UK

S. Houimli,                                          Mécanique des Fluides, Faculté des Sciences de Tunis, Tunisie

A. Jaouabi,                                          Mécanique des fluides, faculté des sciences de Tunis, Tunisie

H. Klifi ,                                              Mécanique des Fluides, Faculté des Sciences de Tunis, Tunisie

N. Malik                                              King Fahd University of Petroleum & Minerals, Department of Mathematics and Statistics, Saudi Arabia                          

E. Meneguz,                                         University of Newcastle upon Tyne, School of Mechanical & Systems Engineering, UK

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

A. Pumir,                                             Laboratoire de Physique, Ecole Normale Supérieure de Lyon, France

B. Oesterlé                                           Université de Lorraine, UHP, LEMTA-CNRS, France

D. Queiros-Conde,                                Université de Paris XII, Génie Thermique, Ville d'Avray, France

J.M. Redondo,                                      Fisica Aplicada UPC, Spain

M. Reeks,                                             University of Newcastle upon Tyne, School of Mechanical & Systems Engineering, UK

N. Rimbert,                                           LEMTA UMR CNRS 7563, ESSTIN College of Engineering, Nancy University, France

J. C. Vassilicos,                                     Imperial College, London, UK

F. Zhang,                                              Institut de Radioprotection et de Sûreté Nucléaire, St-Paul-Lez-Durance, France

 

 

 

 

 

NEW: Preliminary programme:

length of talks: 20 min + 5 min for questions

 

 

 

Practical information:

 

Dr F. Godeferd

 

Dr C. Cambon

 

Please find hereafter some information about accommodation during the July workshop.

Budget lodging is available in the students residence "Paul Comparat" of Ecole Centrale de Lyon.  http://www.ec-lyon.fr/45652863/0/fiche___pagelibre/&RH=VIEHEB


The rates are
   - 22 EUR/night for students
   - 30 EUR/night otherwise


The campus can be reached by

 

bus  No 55 direct from Perrache train station,

or

bus No 3 and 19 which connects to  the Underground

 

bus stop "Ecole Centrale", see http://www.tcl.fr.

 

There are regular buses connecting the airport to the city centre and underground network.

If you wish to stay in the residence "Paul Comparat", please send an email to fabien.godeferd AT ec-lyon.fr with the following information :


- Name
- status (student, researcher)
- arrival date
- departure date

 

Before 21st May 2010.

 

"If you have requested a room reservation at the students residence of ECL before May 21st,
you should have received a confirmation mail on May 31st."

 


Otherwise, participants can make their own reservation for accommodation which can be found through the city of Lyon web site :  http://www.lyon.fr/vdl/sections/en/tourisme/hebergement_touristique_1

 

The conference will be held at

Ecole Centrale de Lyon, LMFA,
36 avenue Guy de Collongue - BP 163,
69131, Ecully CEDEX, France

Room : Amphithéatre 201