'Small scale dynamo' diaporamas de présentation

Plans for Dynamo Research

Plans for Dynamo Research. Presented by F. Cattaneo, S. Prager. Outline. Evidence for dynamo effects in astrophysics in the lab Nonlinear Features of the dynamo status and plans Dynamo Effects Beyond MHD status and plans. Evidence for dynamo effects in astrophysics. IGM

590 views • 45 slides

cattaneo@flash.uchicago

469 views • 34 slides

cattaneo@flash.uchicago

345 views • 34 slides

Numerical simulations of astrophysical dynamos

Numerical simulations of astrophysical dynamos. Dynamos: numerical issues Alpha dynamos do exist: linear and nonlinear Constrained by magnetic helicity: need fluxes How high do we need to go with Rm? MRI and low PrM issue. Axel Brandenburg ( Nordita, Stockholm ). Struggle for the dynamo.

377 views • 27 slides

Numerical simulations of astrophysical dynamos

Numerical simulations of astrophysical dynamos. Dynamos: numerical issues Alpha dynamos do exist: linear and nonlinear Constrained by magnetic helicity: need fluxes How high do we need to go with Rm? MRI and low PrM issue. Axel Brandenburg ( Nordita, Stockholm ). Struggle for the dynamo.

279 views • 27 slides

Large Scale Dynamo Action in MRI Disks

Large Scale Dynamo Action in MRI Disks. Role of stratification Dynamo cycles Mean-field interpretation Incoherent alpha-shear dynamo Axel Brandenburg ( Nordita, Stockholm ). Unstratified MRI turbulence. 512 3 w/o hypervisc. D t = 60 = 2 orbits. No large scale field Too short?

506 views • 24 slides

Large-scale dynamos at low magnetic Prandtl numbers

292 views • 20 slides

Large-scale dynamos at low magnetic Prandtl numbers

205 views • 20 slides

cattaneo@flash.uchicago

295 views • 18 slides