Numerical Simulation of a Turbulent Magnetic Dynamo | Zendy

Saša Kenjereš | Zendy; Kemal Hanjalić | Zendy

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Numerical Simulation of a Turbulent Magnetic Dynamo

Author(s) -

Saša Kenjereš,

Kemal Hanjalić

Publication year - 2007

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.98.104501

Subject(s) - dynamo , physics , dynamo theory , turbulence , magnetic field , magnetic reynolds number , excitation , magnetohydrodynamics , reynolds number , amplitude , classical mechanics , mechanics , quantum mechanics

We present numerical simulations of a turbulent magnetic dynamo mimicking closely the Riga-dynamo experiment at Re approximately 3.5x10(6) and 15< or =Rem< or =20. The Reynolds-averaged Navier-Stokes equations for the fluid flow and turbulence field are solved simultaneously with the direct numerical solution of the magnetic field equations. The fully integrated two-way-coupled simulations reproduced all features of the magnetic self-excitation detected by the Riga experiment, with frequencies and amplitudes of the self-generated magnetic field in good agreement with the experimental records, and provided full insight into the unsteady magnetic and velocity fields and the mechanisms of the dynamo action.

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