Turbulent magnetic dynamo excitation at low magnetic Prandtl number
نویسندگان
چکیده
منابع مشابه
Fluctuation dynamo and turbulent induction at low magnetic Prandtl numbers
This paper is a detailed report on a programme of direct numerical simulations of incompressible nonhelical randomly forced MHD turbulence that are used to settle a long-standing issue in the turbulent dynamo theory and demonstrate that the fluctuation dynamo exists in the limit of large magnetic Reynolds number Rm ≫ 1 and small magnetic Prandtl number Pm ≪ 1. The dependence of the critical Rmc...
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We study numerically the dependence of the critical magnetic Reynolds number Rmc for the turbulent smallscale dynamo on the hydrodynamic Reynolds number Re. We are interested in the regime of low magnetic Prandtl number Pm = Rm/Re < 1, which is relevant for stellar convective zones, protostellar disks, and laboratory liquidmetal experiments. The two asymptotic possibilities are Rmc → const as R...
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ژورنال
عنوان ژورنال: Physics of Plasmas
سال: 2006
ISSN: 1070-664X,1089-7674
DOI: 10.1063/1.2179055