| GIT |  |
The research work of the Instability and Turbulence Group (GIT) concerns out of equilibrium phenomena in complex systems. These studies appeal to statistical physics and non linear dynamics tools, both theoretically and in model experimental situations.
A lot of work has been devoted to pattern formation and the transition to temporal and spatiotemporal chaos : more specifically, the GIT has conducted many researches concerning non linear waves in horizontal convection experiments and subcritical transition to turbulence.
Recently the GIT has developped on one hand activities devoted to turbulence and dynamo and on the other hand the study of granular materials.
Highlights:
Novembre 2009 Let's Jam ! La criticalité de la transition de blocage des milieux désordonnés dévoilée Let's Jam !Les chercheurs du Groupe Instabilités et Turbulence de l' IRAMIS-SPEC (R. Candelier et O. Dauchot) ont montré expérimentalement que la transition de blocage de matériaux granulaires amorphes, qui se traduit par l'apparition d'une rigidité globale, se manifeste par la croissance d'une longueur ... Lire la suite »
Décembre 2008 Granular glass a gigantic Tric-Trac game (O. Dauchot, Frédéric Lechenault, Giulio Biroli, Jean Philippe Bouchaud) La compréhension de la formation des solides amorphes, tels que les verres structuraux et colloïdaux, ou les empilements granulaires demeure un des défis majeurs de la matière condensée. Lorsque la température d’un liquide est abaissée, ou ... Lire la suite »
Mars 2007 The dynamics of the Earth's magnetic field reproduced in the laboratory VKS collaboration (CEA-CNRS-ENS Lyon and Paris, CEA contact: Francois Daviaud) Over the geological ages, the Earth has undergone several erratic reversals of its magnetic field. The sun’s magnetic field is reversed regularly every 22 years according to its cycle. These magnetic dynamics, which are still shrouded in mystery, play a role in our planet’s exposure to ... More »
The main experimental methods being used in the GIT are: thermal control and temperature measurements, optical methods, digital image acquisition and processing, laser and ultrasonic velocimetry, pressure and power measurements.
Finally the GIT is very much involved in scientific popularization: conferences, exhibitions, articles, films... Different "laptop experiments" have been constructed for this purpose.
The GIT runs the "Action Physique & Systèmes Complexes (APSC)" of IRAMIS and is member of the National Network for Research on Complex System.
If you are coming from the IRAMIS website, learn more about the GIT : Discover the WEB site of the GIT !.
maj : 16-12-2009 (214)