ERCOFTAC/SIG 35

 

Workshop of Synthetic Turbulence Models

29th-30th November, 2007

 

CAMPUS UNIVERSITARI DE LA MEDITERRÀNIA | VILANOVA I LA GELTRÚ

 

 

 

 

 

 

Co-organizer (local): Prof. J. M. Redondo

 

Email:     redondo@fa.upc.edu/ alex@fa.upc.edu

 

Fisica Aplicada UPC,

Campus Nord B5. Barcelona 08034, Spain

Fax(+34) 93401 6090.

 

http://www.campusmed.net

 

Co-organizer and Contact person: Dr F. Nicolleau

 

Email:     F.Nicolleau@sheffield.ac.uk

Tel:          +44 (0)114 222 7867

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

 

Co-organizer: Dr C. Cambon

Email:     Claude.Cambon@ec-lyon.fr

               Ecole Centrale de Lyon, France

 

 

 

 

Aims of the workshop

- This workshop follows the one help in May at Sheffield (UK)

ERCOFTAC/SIG 35

Workshop of Synthetic Turbulence Models

29th-30th May, 2007

http://www.shef.ac.uk/mecheng/mecheng_cms/staff/fcgan/SIG-workshop.htm

 

- It was then recognised that the KS community needs to meet regularly

 

- We take the opportunity of another ERCOFTAC event (SIG14), in Barcelona to organise there our second workshop on Synthetic Turbulence Models

 

 

Workshop Program: Preliminary under construction

 

Confirmed talks:

 

 

Dr A. Baggaley, University of Newcastle, UK 

 

The Flux Tube Dynamo

 

Dr K. Bajer, University of Warsaw, Poland 

 

Magnetoelliptic instability in a rotating frame

 

Dr C. Cambon, Ecole Centrale de Lyon, France

 

KS incorporating linear dynamics and strongly anisotropic spectra.

 

Dr R. Castilla, UPC, Terrasa, Spain

 

Eulerian and Lagrangian comparisons of 2D DNS and KS

 

Dr A. Khan, University of Glasgow, UK

 

LES, KS, and particle deposition in the human airways

 

Dr F. Nicolleau and A. Abou El Azm. University of Sheffield, UK

 

KS prediction for the dispersion of tetrahedon

 

Prof. M. Reeks, University of Newcastle, UK

 

Application of KS to particle Segregation in Turbulent Structures

 

J.M. Redondo, UPC, Barcelona, Spain

 

Hyperdiffusivity in non-homogeneous turbulence

 

M. Wächter,  Carl von Ossietzky University, Oldenburg, Germany

 

Stochastic multiscale analysis and reconstruction of time series of small scale turbulence

 

 

 

To be confirmed talks:

 

 

Pr J Davila, University of Seville, Spain

                                          

TBA

 

 

 

 

Audience:
This workshop will be the third to be labelled ERCOFTAC/SIG 35 in 2007.

The second dedicated to Synthetic Turbulence Models. If you are not member of the SIG (Special Interest Group) 35,

this message may concern you as a specialist of "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.

 

After posing these problems and others,

the workshop will end with two discussion groups about the future of KS and Synthetic Turbulence.



Confirmed participants:

 

A. Abou ElAzm                                       University of Sheffield (UK)

A. Baggaley                                            University of Newcastle, School of Mathematics and Statistics (UK)

K. Bajer,                                                 University of Warsaw, Poland 

C. Cambon                                             Ecole Centrale de Lyon, LMFA, (France)

R. Castilla,                                              UPC, Terrasa, (Spain)

M. I. A. Khan                                         Univeristy of Glasgow (UK)

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

J. M. Redondo                                        UPC, Barcelona (Spain)

M. Reeks                                                University of Newcastle (UK)

M. Wächter                                            Carl von Ossietzky University, Oldenburg, Germany

 

 

 

Preliminary programme

 

THURSDAY 29 NOVEMBER 2007

 

12:00-12:30              Registration, XDFTG and ERCOFTAC SIGs outlook and Welcome adress. Jose M. Redondo, P. Fraunie, F. Nicolleau , Nuria Blanes and P.Arnau

 

12:30-13:00              Diffusion and Lagrangian Methods in Stratified flows. J.M.Redondo

 

13:00 - 14:30. Lunch

 

15:00-15:40              Numerical Models of Coastal flows. P. Fraunie

 

15:40-16:20              Turbulence parametrizations in complex Flows. T. Bodnar

 

16:20-17:00              ERCOFTAC New SIG on Synthetic Turbulence. F. Nicolleau

 

17:00-17:30. Coffee Break

 

17:30-18:20              Turbulent dispersion and diffusion. A. Maurizi

 

18:20h-18:40.           Experiments in Rotating Stratified Forced Flows. A.Matulka and A.Carrillo

 

18:40-19:20.             TBA- Kinematic Simulations. A. Baggaley/Matias, Waechter/Elena Menguz

 

19:30-22:30              Short Poster (1 and 2 session) Presentations

 

20:30-22:00             Reception at the Moli de mar Gardens

 

 

FRIDAY 30 NOVEMBER 2007

 

09:00-15:30              SYNTHETIC TURBULENCE ERCOFTAC SIG. Special Session

 

09:00-09:30              KS prediction for the dispersion of tetrahedon. F.Nicolleau and A. Abou El Azm.

 

09:30-10:00              LES, KS, and particle deposition in the human airways. A.Khan

 

10:00-10:30.             Application of KS to particle Segregation in Turbulent Structures. M. Reeks

 

10:30-11:00              TBA- Synthetic Turbulence models. A. Abou ElAzm/ Matias Waechter/Elena Meneguz

 

11:00h-11:30h. Coffee Break

 

11:30-12:00              Vortice structure in Turbulence models. K. Bajer

 

12:00-13:00              Lagrangian Turbulent Diffusion and Generalized Richardson¡¯s Law. Roberto Castilla/ Armando Babiano

 

13:00-13:30              . Fractal analysis in turbulent environments. Joan Grau

 

13:30-14:30. Lunch

 

15:00-15:30              Stratified and rotating turbulence models. C.Cambon

 

15:30-16:00              Hyperdiffusivity in non-homogeneous turbulence. J.M. Redondo

 

16:00-16:30              Numerical models of Stratified Rotating turbulence. A.Delache, Godofred and C. Cambon

 

16:30 - 17:00            Oil Spills, Slicks and Vortices in the NW Mediterranean Sea. Alexei Platonov

 

17:00-18:00              . Cofee Break and Poster session 1

 

18:00-18:20.             Intermittency and the Atmospheric Boundary Layer Turbulence. C. Vindel, J.M. Redondo and C. Yague.

 

18:20-18:40 .            Deep Ocean sensors. X. Roset

 

18:40-19:00.             Rotating-Stratified flow- PIV experimental measurements. A. Carrillo

 

19:00-19:20.             Ocean Instrumentation advances. O.Lopez

 

19:20-19:40.             Vortices in the Ocean Surface. P. Arnau

 

19:40-20:20              Discussion about ERCOFTAC SIG activities

 

20:30-23:00              Barbaque Dinner at the Moli de Mar Site.

 

 

Practical information

 

The conference will take place at the same place as

 

ADVANCES IN TURBULENCE IX

PAN-EUROPEAN LABORATORY ON

                                                 NON-HOMOGENEOUS TURBULENCE

 

29th November- 1st December 2007

CUM-UPC, Vilanova i la Geltr¨²

Barcelona, Spain

 

 

http://www.campusmed.net

 

 

 

The local contact person is

 

NURIA BLANES

Secretaria del CUM

 

C/ de la Uni¨® , 81-87

08800 Vilanova i la Geltr¨²

 

Tel.: +34 93 893 83 99

        +34 93 814 04 40

Fax: +34 93 893 83 99

 

correu-e: cum@vilanova.cat

 

 

 

Location:

 

                       MOLI DE MAR, Po Ermita de St. Cristofor  (Far)

                      Vilanova i la Geltr¨², 08800 Barcelona, Spain

 


 

 

 

To Tarragona

 

To Barcelona

 

 


 

 

How to arrive to Vilanova

 

 

*From the Airport:  Take the RENFE railway towards Barcelona SANTS, at EL PRAT change trains and take the southward train  Line C2 towards Vilanova

 

*From Highway A7: Exit at Vilafranca del Penedes towards Vilanova i la Geltru- Sitges

 

*From Highway C-32 ( or C-31)  Exit at the first Vilanova I la Geltru Exit, follow the 1st roundabout towards the Beach ( to go to Moli de Mar ) or to the RENFE station (to go to the UPC Residence and to Can Gatell Hotel.

 

 

 

 

Accommodation and Information

 

 

 

The lectures and accommodation will take place at the MOLI DE MAR

Large House near the Lighthouse

 

There are also additional optional rooms available  for participants at:

 

Hotel CAN GATELL    CAN GATELL INN **. 6-16, Puigcerd¨¢ street. Phone (+34) 938 930 117 

 

Residencia UPC: Rambla de l'Exposici¨® 41  Tel: 93 811 59 00   

http://www.qualitat.es/residencia/