Turbulent Processes and Mean-Field Dynamo
Axel Brandenburg, D. Elstner, Youhei Masada, В. В. Пипин
Abstract
Abstract Mean-field dynamo theory has important applications in solar physics and galactic magnetism. We discuss some of the many turbulence effects relevant to the generation of large-scale magnetic fields in the solar convection zone. The mean-field description is then used to illustrate the physics of the $\alpha $ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>α</mml:mi></mml:math> effect, turbulent pumping, turbulent magnetic diffusivity, and other effects on a modern solar dynamo model. We also discuss how turbulence transport coefficients are derived from local simulations of convection and then used in mean-field models.
Topics & Concepts
DynamoDynamo theoryPhysicsTurbulenceMagnetic diffusivitySolar dynamoConvection zoneMagnetic fieldConvectionMagnetohydrodynamicsField (mathematics)Turbulent diffusionStatistical physicsAstrophysicsMeteorologyMathematicsQuantum mechanicsPure mathematicsSolar and Space Plasma DynamicsGeomagnetism and Paleomagnetism StudiesStellar, planetary, and galactic studies