ERCOFTAC/SIG 42

 

3rd Workshop on Synthetic Turbulence Models

 3rd C 4th July 2008, Newcastle upon Tyne

 

 

 

Co-organizer (local): Prof. M. Reeks

 Mike.Reeks@newcastle.ac.uk

+44 (0)191 222 3570

+44 (0)191 222 5236

School of Mechanical& Systems Engineering
Stephenson Building
Claremont Rd

University of Newcastle upon Tyne
Newcastle upon Tyne, NE1 7RU
UK

 

Co-organizer (local):  Andrew Baggaley

A.W.Baggaley@newcastle.ac.uk

School of Mathematics & Statistics

Herschel Building
Newcastle University, Newcastle upon Tyne
NE1 7RU, United Kingdom
.

 

Co-organizer (local):  Elena Meneguz

Elena.Meneguz@ncl.ac.uk

School of Mechanical& Systems Engineering

Stephenson Building
Claremont Road
University of Newcastle Upon Tyne
NEWCASTLE UPON TYNE NE1 7RU
U.K.

 

Co-organizer: Dr 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: Dr F. Nicolleau

F.Nicolleau@sheffield.ac.uk

+44 (0)114 222 7867

University of Sheffield 
Department of Mechanical Engineering
Mappin Street
Sheffield S1 3JD, United Kingdom

 

Co-organizer: Pr J. C. Vassilicos

j.c.vassilicos@ic.ac.uk

Imperial College of Science, London, Department of Aeronautics,
Prince Consort Road, South Kensington,
London SW7 2BY, United Kingdom

 

  

              

Aims of the workshop

 

- This workshop is the 3rd  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, December issue, 2007

            29th-30th November, 2007         UPC, Vilanova i la Geltru
ERCOFTAC bulletin 76, March issue, 2008

 

Workshop Program:

 

Confirmed talks:

 

Y. Ammar, M. Reeks and D. Swailes, University of Newcastle, School of Mechanical& Systems Engineering, UK

Agglomeration of inertial particles in a random symmetric straining flow field.

 

J.-R. Angilella, Nancy-Universit└s, LAEGO, France

Chaotic particle settling in elementary flow structures.

 

A. Baggaley, University of Newcastle, Mathematics & Statistics, UK

 

C. Cambon, ECL, Lyon, France

KS of anisotropic turbulence with waves: recent progresses.

 

B. Favier, F. S. Godeferd & C. Cambon, ECL, Lyon, France

Space and time correlations of rotating turbulence using KS - Application to aeroacoustics.

 

The aim of this talk is to demonstrate the capability of the KS approach for the prediction and the analysis
of the noise emitted by turbulence. A comparison between space and time correlations of velocity modes computed
from KS and DNS is proposed. Both isotropic and anisotropic (e.g. rotating) cases will be studied.

 

R. Ijzermans, University of Newcastle, School of Mechanical& Systems Engineering, UK

 

E. Akylas & S. Kassinos,  University of Cyprus, Mechanical & Manufacturing Engineering,  Cyprus

An Interacting Particle Representation Model for the deformation of homogeneous turbulence..
 

A. Khan, University of Glasgow, Physics, UK

 

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

 

F.C.G.A. Nicolleau, University of Sheffield, Mechanical Engineering, UK

KS prediction of Richardson regime.


A. F. Nowakowski, University of Sheffield, Mechanical Engineering, UK

A compressible multiphase flows model with interfaces.

 

J.M. Redondo, UPC, Barcelona, Spain

 

Y. A. Sergeev, C.F. Barenghi, D. Kivotides & A.J. Mee, University of Newcastle, School of Mechanical and Systems Engineering

Trajectories of solid particles in a tangle of vortex filaments.
 

D.C. Swailes, University of Newcastle, School of Mechanical and Systems Engineering
PDF models for particle transport in randomized symmetric straining flows.

 

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

 

 

 

Audience:
This workshop will be the third on Synthetic turbulence, the first to use the newly approved  label ERCOFTAC/SIG 42

It is open to anyone interested in "synthetic turbulence" including the so-called Kinematic Simulation, (KS hereinafter).

 

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. On the other hand, the absence of "sweeping effects" in present conventional KS versions is identified as a major drawback in very different applications: inertial particle clustering (Vassilicos et al.) as well as in aeroacoustics. Nevertheless, this issue was addressed in some basic papers (Fung et al.), and merits to be revisited in the light of new studies in progress.

 

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" (Kassinos et al.),
- 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 (Luo et al.)
- 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.

 


Confirmed participants:

 

E. Akylas                                               University of Cyprus, Mechanical & Manufacturing Engineering, Cyprus

J.-R. Angilella                                         Nancy-Universit└s, LAEGO, France

A. Baggaley                                            University of Newcastle, Mathematics & Statistics, UK

C. Cambon                                             Ecole Centrale de Lyon, LMFA, France

B. Favier                                                Ecole Centrale de Lyon, LMFA, France

F. S. Godeferd                                        Ecole Centrale de Lyon, LMFA, France

R. Ijzermans                                           University of Newcastle, School of Mechanical & Systems Engineering, UK

A. Khan                                                  University of Glasgow, Physics, UK

Y. Li                                                      University of Sheffield, Applied Mathematics, UK

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

F.C.G.A. Nicolleau                                  University of Sheffield, Mechanical Engineering, UK

A. F. Nowakowski                                  University of Sheffield, Mechanical Engineering, UK

K. Ohkitani                                            University of Sheffield, Applied Mathematics, UK

J.-M. Redondo                                       UPC, Barcelona, Spain

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

O. Ross                                                 University of Essex, Biological Sciences, UK

Y. A. Sergeev                                         University of Newcastle, School of Mechanical and Systems Engineering

D.C. Swailes                                          University of Newcastle, School of Mechanical and Systems Engineering

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

H. Zheng                                                University of Sheffield, Mechanical Engineering, UK

 

 

Preliminary programme:

 

Thursday 3rd July 2008
           
09:30 Registration       
10:00 Introduction (Welcome and Introductory speech)
10:30 Talk 1 Y. Ammar      
11:00 Coffe      
11:30 Talk 2 A. Baggaley    
12:00 Talk 3  Y.A. Sergeev - short talk  
12:30 Lunch      
           
14:00 Talk 4 J. C. Vassilicos    
14:30 Talk 5 E. Meneguz    
15:00 Talk 6 B. Favier      
15:30 Coffee      
16:00 Talk 7 A. Nowakowski    
16:30 Talk 8 JR Angilella    
17:00 Talk 9 J.M. Redondo (to be confirmed)  
           
19:30 Conference Dinner      

 

Friday 4th July 2008
           
10:00 Talk 10 R. Ijzermans    
10:30 Talk 11 C. Cambon    
11:00 Coffe      
11:30 Talk 12 F.Nicolleau    
12:00 Talk 13 D.C. Swailes - short talk  
12:30 Lunch      
           
14:00 Talk 14 E. Akylas     
14:30 Talk 15 A. Khan (to be confirmed)  
15:00 Coffee      
15:30 Conference discussion    
16:30 End of Conference      

 

length of talks: 25 min + 5 min for questions

 

 

 

Practical information:

 

Travelling to the University of Newcastle

 

list of accommodations

 

 

You will be able to access the wireless at Newcastle as if you
were at your home institution through

 

http://www.eduroam.org/

 

Participants will receive a temporary ID and password to access the computer room

in case they are not able to use the wireless connection.

Details will be given at the beginning of the conference.

 

 

The conference will take place at

 

The University of Newcastle

Room 2, Level 4

 

Herschel Building

 

Mathematics & Statistics

 

Newcastle upon Tyne

UK