Quantum Turbulence
Jeudi 29 novembre 2012 10:30
- Duree : 1 heure
Lieu : Salle "Remy Lemaire" K 223 (1er étage) bât. K de l’institut Néel/CNRS - 25 rue des martyrs - 38000 Grenoble
Orateur : Ladic SKRBEK (Charles University, Prague)
We review physical properties of quantum fluids He II and 3He-B, where quantum turbulence (QT) has been studied experimentally. Basic properties of QT in these working fluids are discussed withi n the phenomenological two-fluid model. We consider counterflows in which the normal and superfluid components flow against each other, co-flows in which the direction of the two fluids is the same as well as the important case of zero temperature limit, where QT represents an interesting and probably the simplest prototype of three-dimensional turbulence in fluids. Experimental techniques to explore QT such as direct visualization using frozen tracer particles of solid hydrogen/deuterium, second sound attenuation, Andreev reflection, NMR, ion propagation and drag on vibrating objects are briefly introduced, emphasizing those used in our Prague Laboratory. Results of various experiments are discussed, emphasizing similarities and differences between classical and quantum turbulence.
Contact : mathieu.gibert@grenoble.cnrs.fr
Discipline évènement : (Physique)
Entité organisatrice : (LANEF)
Nature évènement : (Séminaire)
Evènement répétitif : (Evènement LANEF - Alliance 6 Cryo)
Site de l'évènement : Polygone scientifique
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