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EULAG-MHD: Simulation of the global solar dynamo

Presented by: 
P Smolarkiewicz [National Center for Atmospheric Research (NCAR)]
Date: 
Tuesday 23rd October 2012 - 11:30 to 12:30
Venue: 
INI Seminar Room 1
Abstract: 
An MHD extension of the hydrodynamical solver EULAG [1] has been recently shown to simulate regular magnetic cycles and dynamo action, unprecedented in global simulations of solar magneto-convection [2, 3]. The lecture will highlight the mathematical and numerical features distinguishing EULAG from standard anelastic solar codes, including generalized time-dependent coordinate transformation and nonoscillatory forward-in-time integration schemes. The results illustrate advantages of the implicit large-eddy-simulation (ILES) approach, together with evidence that treatment of small scales may be critical for the production of cyclic behaviour and regular polarity reversals in this type of global simulations.

References: [1] Prusa et al., Comput. Fluids 37, 1193 (2008); [2] Ghizaru et al., ApJL 715, L133 (2010); [3]Racine et al., ApJ 735, 46 (2011) .
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Presentation Material: 
University of Cambridge Research Councils UK
    Clay Mathematics Institute London Mathematical Society NM Rothschild and Sons