A systems approach to turbulence, with scalar transport, buoyancy effects and possible confinement

This workshop is in line with the previous one, co-organized by Pierre Sagaut and Claude Cambon in the same place, similar conditions, last year. Transport of passive scalar by an isotropic velocity field has been extensively studied. What happens when the velocity flow is rendered anisotropic by various effects, as mean shear and mean stratification, is not well known; triadic closures, with quantitative comparisons to high resolution DNS’s, are well suited for a systems approach to such anisotropic turbulence. In addition, it is informative to compare the passive scalar and the active one, such as the density, temperature or concentration fluctuation with a feedback to fluctuating velocity via buoyancy effects.

Dates

du lundi 4 mai 2015 au mardi 5 mai 2015

Lieu

Institut Jean Le Rond d’Alembert, UPMC, Paris

Programme

Monday 4/5

• 09h20 Introduction
  Claude Cambon
  LMFA, École centrale de Lyon, Écully

• 09h30 A new spectral model for shear-driven flows
  Vincent Mons
  IJLRA, Paris

• 10h00 Passive scalar and cospectrum in homogeneous isotropic turbulence
  Antoine Briard
  IJLRA, Paris

• 10h30 Break

• 10h45 Challenging mix models on transients to self-similarity of unstably stratified homogeneous turbulence
  Benoît-Joseph Gréa
  CEA, near Paris

• 11h15 The N S f approach, in engineering, geophysics and astrophysics
  Fabien Godeferd
  LMFA, École centrale de Lyon, Écully

• 12h00 Lunch

• 14h30 Lagrangian intermittency and quantum mechanics analogy
  Laurent Nottale et Thierry Lehner
  LUTH, Observatoire de Meudon

• 15h00 Break

• 15h30 Wave turbulence in vibrating
  Christian Josserand
  IJLRA, Paris

• 16h00 Eulerian models for DNS and LES relying on kinetic-based moments methods
  Marc Massot
  IJLRA, Paris

Tuesday 51/5

• 09h00 Scaling law of thermal convection induced by heated particles
  Rémi Zamanski
  IMFT, Toulouse

• 09h30 The streamwise turbulence intensity in the inertial layer of a pipe channel flow
  J. Christos Vassilicos
  Imperial College, London

• 10h00 On the role of big eddies for the control of dissipation
  Pierre Sagaut
  M2P2, AMU, Marseille

• 10h30 Break

• 10h45 On the role of big eddies for the control of dissipation
  Stéphane Zaleski et Yue Stanley Ling
  IJLRA, Paris

• 11h15 Dynamics of streamwise vortices in an axisymmetric mixing layer under excitation
  Laurent Jacquin et Romain Courtier
  ONERA, DAFE, Paris

• 11h45 Round table, and closure discussion `future for advanced turbulence modelling?’
  Antoine Llor, Laurent Jacquin et Pierre Sagaut
  animators