Causality in turbulence and transition

Aeronautics, Universidad Politécnica de Madrid

May 3–5, 2022

About

Fluid mechanics, and mechanics in general, occupies an especial place in physics because the equations of motion are known and generally trusted. That makes the connection between cause and effect relatively easy to study, essentially amounting to performing simulations or well-planned experiments. The inverse way, from effect to cause, has received less attention, to the point that its very definition is open to debate. It is the premise of the proposed conference that the advent of ever faster computers is beginning to make the inverse problem more tractable, and that the time is ripe for a discussion of what can be done, how to do it, and what results could be expected, both in the short and in the medium term.

Scope

  1. What counts as a cause if we know the equations? Over what temporal horizon?
  2. Are causal events relevant in chaotic systems, or merely intellectual curiosities?
  3. Can causal relevance be used to define structures?
  4. Are causal events related to coherence? To invariant solutions?
  5. Does elucidation of causes always require interventional experiments?
  6. Do on- and out-of-attractor perturbations carry the same or different messages?
  7. Is causation more useful than correlation? Are they really different?
  8. Is causal significance different from sensitivity to perturbations?
  9. Control implications.
  10. How much can be done with limited information (such as from experiments)?
...

Important Dates


Abstract submission January 16/22
Abstract acceptance March 4/22
Attendance confirmation March 25/22
Conference May 3–5/22

Invited Speakers


  • G. Kawahara (Osaka)
  • P. Komoutsakos (Harvard)
  • M. J. Rodwell (ECMWF)
  • J. Runge (DLR)
  • K. Taira (UCLA)

Schedule

You can download the schedule and the book of abstracts in the link below

Download

You can download the recordings and abstracts of individual talks in the links below

First Session — Chair: A. Lozano-Durán
Multi-agent reinforcement learning in flow modelling and control
P. Koumoutsakos Abstract Video
Information flow and bottom-up causation in a quasi-geostrophic turbulence
X. S. Liang, L. Wang & W. Li Abstract Video
Machine-aided discovery of significant regions in isotropic turbulence
M. P. Encinar & J. Jiménez Abstract Video
Causality in isotropic turbulence at low Reynolds number
X. Zhang & J. Jiménez Abstract Video
Inter-scale causality in near-wall turbulence
Z. Hao & R. García-Mayoral Abstract Video
Second Session — Chair: G. Boffeta
Causality in turbulent entrainment of a passive scalar in free-shear flows
G. Boga, E. Stalio & A. Cimarelli Abstract Video
Causality in Rayleigh-Bénard and Taylor-Couette turbulence
D. Lohse Abstract Video
Causality in immiscible Rayleigh-Taylor turbulence
S. Brizzolara, M.E. Rosti, A. Mazzino & M. Holzner Abstract Video
Causality-based algorithms for adaptive mesh refinement in turbulent flow simulations
D. Massaro, S. Rezaeiravesh & P. Schlatter Abstract Video
Third Session — Chair: M. Uhlmann
Causality analysis of large-scale structures in urban flows
E. López, R. Vinuesa, S. Le Clainche, A. Lozano-Durán & A. Srivastava Abstract Video
Spectral analysis of the evolution of energy-containing eddies
E. Kannadasan, C. Atkinson & J. Soria Abstract Video
Massive computational study of causal events in turbulent channel flow
K. Osawa & J. Jiménez Abstract Video
Dynamics of turbulent structures in Couette-Poiseuille flow
J.E. Wesfreid, T. Liu, B. Semin & R. Godoy-Diana Abstract Video
Comparison between interventional and observational causal inference in turbulence
Y. Ling & A. Lozano-Durán Abstract Video
Fourth Session — Chair: G. Kawahara
Broadcasting Perturbations over Turbulence
K. Taira, C-A. Yeh & K. Fukami Abstract Video
On-the-fly Reduced-Order Modeling of Turbulent Flow Response to High-Dimensional Forcing with Time-Dependent Bases
E. Ballouz, B. López-Doriga, S.T.M. Dawson & H.J. Bae Abstract Video
Uncovering the link between dimensional analysis and causality
Z. del Rosario, Ll. Jofre & G. Iaccarino Abstract Video
Large-scale dynamics determines the predictability of extreme events in turbulence
A. Vela-Martín & M. Avila Abstract Video
Causality in drop-turbulence interactions: identifying the driver of drop deformation and breakup
A. Vela-Martín & M. Avila Abstract Video
Fifth Session — Chair: P. Koumoutsakos
Butterflies in the atmosphere: Evaluating local divergence on the model attractor
M. Rodwell Abstract Video
Predictability of homogeneous isotropic turbulence
G. Boffetta & S. Musacchio Abstract Video
Inherent high-frequency instabilities developing from smooth noiseless initial conditions
C.J. Sear & S. Cowley Abstract Video
Cause and effect in turbulence - a statistical point of view
M. Oberlack & S. Hoyas Abstract Video
Variability of the flow around an impulsively started plate
W. van de Water, Jesse Reijtenbagh, J. Westerweel & Mark Tummers Abstract Video
Generalised quasilinear approximations of turbulent channel flow. Streamwise nonlinear energy transfer
C. González-Hernández, Q. Yang & Y. Hwang Abstract Video
Sixth Session — Chair: M. Ávila
Invariant solutions and causality in turbulence
G. Kawahara Abstract Video
Ultimate heat transfer in coherent thermal convection
S. Motoki, G. Kawahara & M. Shimizu Abstract Video
New class of solutions in plane Couette flow
M. Nagata Abstract Video
Causality in sedimentary turbulent channel flows
M. Scherer & M. Uhlmann Abstract Video
Investigating the interaction between turbulent flows and suspended particles with the aid of invariant solutions
M. Uhlmann, T. Pestana, M. Krayer & G. Kawahara Abstract Video
Scaling and spatio-temporal constraints of the minimal seed in boundary-layer flows
E. Taschner, M. Beneitez, Y. Duguet & D.S. Henningson Abstract Video
Final Session — Chair: J. Jiménez
Causal inference, causal discovery, and machine learning
J. Runge Abstract Video
Discussions
Panel Discussion
D. Lohse & A. Lozano- Durán Video
General Discussion
G. Giaccarino & P.J. Schmid Video

Accommodation

The following hotels are located close to the School of Aeronautics; and provided only as a suggestion.

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Registration

Registration is closed.

Scientific Commitee


  • Oscar Flores
  • Dan Henningson
  • Gianluca Iaccarino
  • Javier Jiménez
  • Deflef Lohse
  • Adrián Lozano-Durán
  • Genta Kawahara
  • Rich Kerswell
  • Peter Schmid

Local Organising Commitee


  • Javier Jiménez
  • Kosuke Osawa
  • Miguel P. Encinar
  • Administrative assistant
  • Aurora García

Sponsors

Address


Plaza del Cardenal Cisneros, 3
28040 Madrid, Spain

Phone


If at all needed, contact Aurora Garcia
+34 9106 75544
from 9:00-14:00 CET, Monday to Wednesday