Multiflow Summer School '15

May 25th - June 26th

The goal of the MULTIFLOW project is to understand in detail the physics of turbulence. The School of Aeronautics of the Universidad Politécnica de Madrid invites participation of interested scientists in a one-month work program to explore and exchange new ideas, hopefully leading to archival publications, and/or to continued collaborations.

Problems of interest

All problems related to the physics of turbulent flows will be considered, but special emphasis will be given to

  • Cascade processes in turbulence.
  • Coherent structures evolution.
  • Reduced-order models.
  • Structure identification schemes.
  • Multiscale

Resources

  • In house parallel postprocessing and mass storage facilities.
  • Access to existing simulation databases.

Agenda

Google Calendar links: HTML, ICAL.

Madrid, May 25th, 2015

09:00 – 13:00
Check in & registration

E.T.S.Ing.Aeronáutica y del Espacio – UPM (Plaza Cardenal Cisneros, 3 )

Workshop rooms on the 1st floor.


13:00 – 14:30
Lunch break (this will happen every day)

E.T.S.Ing.Aeronáutica y del Espacio – UPM Cafeteria on the basement


14:30 – 20:00
Welcome & kick off meeting

E.T.S.Ing.Aeronáutica y del Espacio – UPM Torres Quevedo room on the 2nd floor

Short presentation of working plans (15 minutes/team). Please, let us know as soon as possible who will be the spokesperson for your team.


Madrid, May 26th to 29th, June 1st, 2nd, 5th, June 8th, to June 11th, June 15th ,16th, 18th, 19th and June 22nd to June 25h

09:00 – **:00
Project Work

E.T.S.Ing.Aeronáutica y del Espacio – UPM Workshop rooms on the 1st floor


Madrid, June 3rd, 2015

09:00 – **:00
Project Work

E.T.S.Ing.Aeronáutica y del Espacio – UPM Workshop rooms on the 1st floor


17:00 – 18:00
Seminar open to all by Prof. Julio Soria, Monash University, AU.

E.T.S.Ing.Aeronáutica y del Espacio – Torres Quevedo room on the 2nd floor.

Self-similar adverse pressure gradient turbulent boundary layer flows: DNS and Experiments.


Madrid, June 4th, 2015

All day
Local holiday

The School of Aeronautics is closed.


Madrid, June 12th, 2015

10:00 – 20:00
Mid-term. Full day presentations.

E.T.S.Ing.Aeronáutica y del Espacio – Torres Quevedo room on the 2nd floor.


Madrid, June 17th, 2015

09:00 – **:00
Project Work

E.T.S.Ing.Aeronáutica y del Espacio – UPM Workshop rooms on the 1st floor


17:00 – 18:00
Seminar open to all by Prof. Petros Ioannou, University of Athens, AU.

E.T.S.Ing.Aeronáutica y del Espacio – Torres Quevedo room on the 2nd floor.

Reduced dynamical systems on hydrodynamics


Madrid, June 26th, 2015

9:00 – 20:00
Final presentations. Full day.

E.T.S.Ing.Aeronáutica y del Espacio – Torres Quevedo room on the 2nd floor.


21:30 – **:00
Final Banquet.

To be decided.


Meetings

Kick off meeting. May 25th, 2015. Torres Quevedo seminar room

14 :30

J. Jiménez

Introduction and welcome

14 :45

G. Borrell

Computer resources and use

GROUP:   ROUGHNESS

TIME

AUTHORS / Speaker

HOSTS

PROJECT

15:00

Abderrahaman, N., García Mayoral, R., Chung, D., Hutchins, N.

García Mayoral, R

Coherent Structures in Turbulent Flows Over Transitionally Rough Wall

15:15

McDonald, M., Chung, D., Hutchins, N. García Mayoral,R.

García Mayoral, R

The minimal channel: a fast and direct method for characterising roughness

15:30

Orlandi, P., D'Addio, P., Sassun, D.

Flores, O.

Analysis and Comparison between rough channel and pipe flow with complex irregular surfaces

GROUP:   STRUCTURES IN WALL-BOUNDED FLOWS

15:45

Soria, J.,  Buchner, A-J

Lozano-Durán, A.

The topology and enstrophy-vortex stretching evolution of intense structures that contribute most to the Reynolds stress in wall-bounded turbulent flows

16:00

Cimarelli, A., Togni, R., De Angelis, E.

Lozano-Durán, A.

The role of turbulent structures in determining the statistical properties of turbulence

BREAK

16:45

Ostilla-Mónico, R., Spandan V., Verzicco, R., Lohse, D.

Encinar, M.P.

The structure of angular momentum transfer in Taylor-Couette flow

17:00

Weatheritt, J., Sandberg, R.

Jiménez, J.

Using evolutionary algorithms to further turbulence modelling approaches and to data

GROUP:  LOWER-ORDER MODELS

17:15

Farrel, B., Ioannou, P., Gayme, D., Nikolaidis, M.

Lozano, A.

Jiménez, J.

Energetics of wall-turbulence in the Reduced Nonlinear Model

17:30

Kawahara, G.

Sekimoto, A.

Search for higher-Reynolds-number invariant solutions: Homoclinic orbits to invariant solutions as logarithmic-layer bursting

17:45

Mamatsashvili, G., Chagelishvili, G., Khujadze, G.

Dong, S.

Subcritical Turbulence in 3D unbounded plane shear flows self-sustenance via interplay of linear transient growth and nonlinear transverse cascade

---

Podvin, B.

Encinar, M.P.

POD-based models for wall turbulence

GROUP:  CASCADES

---

Ishihara, T.

Vela-Martín, A.

Cascade process near the thin shear layers

18:00

Zhou, L., Rauh, C., Delgado, A.

Vela-Martín, A.

Wavelet Cascade Model and the Dynamic Construction for Turbulent Flow

GROUP: PRESSURE GRADIENTS

18:15

Maciel, Y., Simens, M.P.,Gungor, A.

Maciel, Y.

Comparison of the Q Structures and their temporal evolution between a ZPG TBL and two strongly decelerated TBLs

18:30

Bobke, A., Vinuesa, R., Örlü, R., Schlatter, P.

Maciel, Y., Gungor, A.

Pressure gradient turbulent boundary layers: effects on scaling and design of experiments

GROUP: STABILITY AND TRANSITION

18:45

Stegeman, P., Soria, J., Pérez, M., Theofilis, V.

Theofilis, V.

Inception and Evolution of Coherent Structures in Under expanded Supersonic Impinging Jets

Seminars

Prof. Julio Soria. Aerodynamics and Fluid Mechanics. Monash University (Australia)

Self-similar adverse pressure gradient turbulent boundary layer flows: DNS and Experiments.

June 3rd, 17:00h. Torres Quevedo seminar room, second floor.

This seminar will review the concept of self-similarity as it pertains to adverse pressure gradient turbulent boundary layer (APG-TBL) flow. A direct numerical simulation with Reθ up to approximately 6700 has been carried out. First- and second-order statistics of this APG-TBL will be presented. A complementary water tunnel experiment of an analogous APG-TBL has also been set up. Details of the experimental setup, and measurements using 2C-2D PIV will be presented, as will first- and second-order statistics of this APG-TBL experiment.

Prof. Petros Ioannou. Dept. Physics, U. of Athens (Grece)

Constructing low-order dynamics for fluid flows

June 17th, 17:00h. Torres Quevedo seminar room, second floor.

Although turbulent flow is widely perceived to be emblematic of chaotic disorder, research over the last decades has demonstrated that there is a fundamental underlying organization within turbulence that has been associated with the existence of coherent structures. These coherent structures represent a macroscopic order that also constitutes an important component of the dynamics of turbulence. These structures indicate the existence of lower- dimensional processes which motivates the construction of approximate lower- order models of turbulence dynamics that involve these structures. In this talk we discuss approaches for optimally reducing the order of fluid dynamical systems that exploit these coherent structures and also methods to advance understanding of the dynamics of turbulence based on these approaches.