LABORATOIRE CASSIOPÉE - O. C. A.

Séminaire

Phénomènes Physiques et Modèles Mathématiques en Sciences de l'Univers

Le séminaire a lieu le lundi 28 novembre 2005 de 14h00 à 15h00
dans la salle de réunion du PHC (Observatoire de Nice). 

MAGNETIC FIELD GENERATION BY CONVECTIVE FLOWS IN A PLANE LAYER

 Olga Podvigina

  International Institute of Earthquake Prediction theory and Mathematical geophysics, Moscow 

& Laboratory Of general Aerodynamics, Instute of Mechanics, Lomonosov Moscow State University

Hydrodynamic and magnetohydrodynamic convective attractors in a plane
horizontal layer are investigated numerically. We consider Boussinesq
Rayleigh-Benard convection assuming stress-free boundary conditions on horizontal
boundaries and periodicity in horisontal directions. For the considered
parameters fifteen different types of hydrodynamic attractors are found,
out of which only 6 can act as kinematic dynamos.
The final magnetohydrodynamic attractors are either quasiperiodic or chaotic.