ERCOFTAC Workshop
ASTROFLU VI
Meetings around the DFGA theme (Dynamics of Geophysical and Astrophysical Fluids) have shown promising and truly multidisciplinary perspectives, in particular from the meeting co- organized by Philippe Fraunié in Paris in 2017, with the CNRS and the University. These themes are found in ERCOFTAC’s pan-European `SIG’s (Special Interest Groups). Our event will therefore bring together the heads of three SIG’s: Tomas Bodnar (SIG 14 Stably- Stratified & Rotating Flows), Claude Cambon, (SIG 35 Multipoint Turbulence Structure & Modelling), and Andrzej Nowakowski (SIG 42 Synthetic Models in Turbulence.) Recent work has illustrated the rapprochement of modal projection techniques for deterministic and statistical equations, and those of stochastic modeling for the internal intermittency of turbulence (e.g. last ERCOFTAC workshop at CIRM, near Marseille.)
Modal projection is essential to describe the complex dynamics of turbulence in the presence of waves, which help structure in atmospheric and oceanic flows, such as inertia (rotation) and gravity (stratification) waves. These waves can be combined with Alfvén waves in MHD flows. As far as possible, compressibility will be addressed, first in considering acoustic waves (e.g. magnetosonic waves) and acoustic systems in weak turbulence.
The first two local events ‘ASTROFLU’ were principally organized by the Henri Bénard PC in Lyon, 12-13/11/2008 and 15/12/2011. The third one, which took place on November 20- 21, 2013, attracted an European audience and was supported by ERCOFTAC with label and scholarships. The fourth and the fifth ones were supported as well, and took place at Ecole Centrale deLyon, January 24-25, 2019, and December 7-8, 2021.
As for the previous ASTROFLU’s workshops, the main goal of ASTROFLU VI is to gather specialists of fluids mechanics (FLU) in engineering, environment and geophysics, with astrophysicists (ASTRO). Cross-fertilization has been possible, from fluids to plasmas, from stability to turbulence, from fundamental research to applied one. These workshops were an opportunity to compare the tools, theoretical and numerical, used in the different SIG’s mentioned above.
Location
bâtiment W1, École Centrale de Lyon