Workshop

EuHIT School on Turbulence

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Warsaw, Poland

Programme

Day 1,

Registration (8:30 - 10:30) 

Morning session (9:00 - 12:30)

  • 9:00-9:30: Welcome to Warsaw and Warsaw Fluid Dynamics Week 
  • 9:30-10:00: Special lecture „Automotive aerodynamics and turbulence simulation/modeling” by prof. Janusz Piechna (Warsaw University of Technology, Poland)
  • 10:00-10:15: EuHIT what does it offer to me by Kamil Kwiatkowski (University of Warsaw, Poland)
  • 10:15-10:40: overview on EuHIT facilities - Göttingen Turbulence Facilities by Stephan Weiss (Max Planck Institute for Dynamics and Self-Organization)
  • 10:40-11:00: Coffee break
  • 11:00-12:30: Lecture „Turbulence as a meeting place” by prof. Gregory Falkovich (Weizmann Institute of Science, Izrael)

Lunch (12:30-14:00) 

Afternoon session (14:00 -17:30)

Evening social event (19:00 - 22:00 and possibly later)

  • Ice-breaker in Pub Lolek (outdoor grill&bar pub in the middle of park Pole Mokotowskie - 10 min walking from the venue)
  • We gather at the venue at 18:40 to guide you there
  • If you get lost simply ask someone about Pub Lolek in Pole Mokotowskie, it is a well known spot
Day 2,

Morning session (9:00 – 12:30)

Lunch (12:30 – 14:00)

Afternoon session (14:00  17:20)

Late afternoon session (17:30  18:30)

  • Turbase in practice – additional training by Fabio Bonaccorso (Rome, Italy) and Francesco Salvadore (CINECA, Italy)

Evening – enjoy Warsaw! (no official event this evening) 

Day 3,

Morning session (9:00 – 12:30)

  • 9:00–9:15: Overview on EuHIT facilities – CERN Cryogenic Turbulence Facility by Robert Kaiser (Technical University of Ilmenau, Germany)

  • 9:15–9:30: Overview on EuHIT facilities – Turin Rotating Platform by Lorenzo Pistone (University of Torino, Italy)

  • 9:30–9:45: Overview on EuHIT facilities – CICLoPE Center for International Cooperation in Long Pipe Experiments by Tommaso Fiorini (University of Bologna, Italy)

  • 9:45–9:10: Overview on EuHIT facilities – Cottbus Turbulence Experiment Facilities by Gazi Hasanuzzaman (Brandenburg University of Technology, Germany)

  • 10:10–10:40: Coffee break

  • 10:40–10:55: Overview on EuHIT facilities – Czech Cryogenic Turbulence Facility by Patrik Svancara (Charles University in Prague, Czech Republic)

  • 10:55–11:10: Short lecture on “2d-LCA – new approach to high resolved measurements in turbulence” by Jaroslaw Puczylowski (University of Oldenburg, Germany)

  • 11:10–12:00: Is my idea feasible – round table with experimentalists from EuHIT facilities and with the Invited Speakers

  • 12:00–12:30: “How to prepare a successful EuHIT proposal: questions and answers, tips & tricks” by Kamil Kwiatkowski and colleagues from EuHIT facilities

Lunch (12:30 – 14:00)

Afternoon session (14:00 – 15:30)

  • 14:00–14:45: “What drives weather changes” by Gregory Falkovich

  • 14:45–15:30: “Direct Numerical Simulation of Particles in Turbulence” by Bogdan Rosa

  • 15:30–16:00: Coffee break

Evening social event (18:00 – 21:00)

  • Warsaw Fluid Dynamics Week Reception – a joint EuHIT School on Turbulence and 8th European Postgraduate Fluid Dynamics Conference event + extra show. This informal event takes place in Osada Grill & Bar conveniently located 3 min walking from hotel Ibis (address: Bitwy Warszawskiej 19)

Invited speakers

 

Gregory Falkovich Weizmann Institute of Science, Rehovot, Israel
Gregory Falkovich got PhD from Nuclear Physics Institute in Novosibirsk in 1984 and worked in Russian Academy of Science. In 1991 he left Russia for the Weizmann Institute of Science, where he works ever since, all the way from postdoctoral fellow to the department head. He is an author of a textbook "Fluid Mechanics (a short course for physicists)" based on twenty years of teaching the course on fluid mechanics. His work has been focused mostly on theory of turbulence on elementary level but connected as well to applications in geophysics, astrophysics and industry. He was awarded 4 awards of the Russian Academy of Science, one in Israel.
Hrvoje Jasak Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb
Hrvoje Jasak is Professor at University of Zagreb and at Chalmers University. Since 2004 he has been a director of Wikki Ltd. and Wikki GmbH companies providing commercial and research consultancy in computational physics and software engineering. He is one of the co-authors and leading developer of OpenFOAM, an open source object-oriented C++ library for numerical simulations in continuum mechanics. His works are fundamental in Finite Volume discretisation. He is an excellent C++ programmer pushing software and computer architecture to the limits in favour of physics and technology.
Greg Voth
Michael Wilczek

Plenary lectures

Hrvoje Jasak

Lecture: "Numerical Modeling of Turbulent Flows with OpenFOAM for Engineering Applications"

Abstract: In this training session we shall review the theoretical background, numerical implementation and practical use of turbulence modelling in modern industrial CFD. The lecture will review the aspects of practical Direct Numerical Simulation, RANS-based turbulence modelling and Large Eddy Simulation in industrial practice.

 

Gregory Falkovich

Lecture: "Turbulence as a meeting place"

Abstract: Turbulence is a vast field, where mathematicians, physicists and engineers meet astrophysicists and meteorologists. Each discipline brings its own unique perspective into studies of turbulence. What is a nuisance to be eliminated for an engineer could be a source of fascination for a physicist. The most difficult aspect of cross-discipline interaction is mutual understanding of motivations. In this lecture, a physicist will present his view on turbulence and describe several cross-field interactions.

 

Michael Wilczek

Lecture: "Some Aspects of the Past, Present and (perhaps) the Future"

Abstract: Despite its ubiquity in nature and technology, turbulence remains a paradigmatic challenge for non-equilibrium statistical mechanics. This challenge is closely related to the nonlinear, non-local and dissipative character of the underlying equations of motion which withstand most concepts that modern physics has developed so far. The rapid evolution of computational power and experimental techniques, however, has brought significant progress over the past decades by allowing unprecedented insights into the structure and dynamics of turbulence.

In this short course, the participants will be introduced to the phenomenon of turbulence as a complex system that can be treated with methods from non-equilibrium statistical mechanics. Classical phenomenologies such as the Kolmogorov theory will be presented along with first-principle statistical approaches starting from the Navier-Stokes equation. The theoretical results and predictions will be confronted with recent numerical and experimental results. Finally, we will discuss how joint experimental, numerical and theoretical efforts may be combined to make progress in this long-standing problem.

 

Greg Voth

Lecture: "Measurements of the dynamics of turbulent fluid flows using tracking of tracer and complex particles"

Training: "Multi-camera measurement techniques in turbulent flows"

Abstract: The lecture will track the history of particle tracking experiments from Richardson through recent measurements where enough particles are tracked to reveal the full space-time velocity field in 3D turbulence. The focus will be on the insights into the dynamics of turbulent fluids that have been obtained including dispersion, fluid accelerations, Lagrangian structure functions and velocity gradient dynamics in a Lagrangian frame. Then we will explore motion of more complex particles such as inertial particles, spheres larger than the Kolmogorov scale, fibers, disks, and other non-spherical shapes including tetrads and chiral dipoles. The training session will be an interactive exploration of issues involved in designing turbulent flow facilities and measuring fluid flows using multi-camera methods. We will discuss the state of the art in imaging hardware, camera calibration models, and image analysis methods. Particular focus will be on 3D particle tracking methods with comparisons to stereoscopic PIV, Tomo-PIV and holographic particle tracking. We will also discuss some of the challenges of designing flow facilities and some of the real-world properties of turbulent flows such as facility scale modes and large scale intermittency that always exist but are not always accounted for.