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SUMMARY:EULAG-MHD: Simulation of the global solar dynamo - Smolarkiewicz\,
  P (National Center for Atmospheric Research (NCAR))
DTSTART:20121023T103000Z
DTEND:20121023T113000Z
UID:TALK41102@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:An MHD extension of the hydrodynamical solver EULAG [1] has be
 en 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 distin
 guishing EULAG from standard anelastic solar codes\, including generalized
  time-dependent coordinate transformation and nonoscillatory forward-in-ti
 me integration schemes. The results illustrate advantages of  the implicit
  large-eddy-simulation (ILES) approach\, together with evidence that treat
 ment of small scales may be critical for the production of cyclic behaviou
 r and regular polarity reversals in this type of global simulations.\n\nRe
 ferences:  \n[1] Prusa et al.\, Comput. Fluids 37\, 1193 (2008)\;   \n[2] 
 Ghizaru et al.\, ApJL 715\, L133 (2010)\;   \n[3]Racine et al.\, ApJ 735\,
  46 (2011) .\n\n
LOCATION:Seminar Room 1\, Newton Institute
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