Turbulent transport in hydromagnetic flows

Abstract

The predictive power of mean-field theory is emphasized by comparing theory with simulations under controlled conditions. The recently developed test-field method is used to extract turbulent transport coefficients both in kinematic as well as nonlinear and quasi-kinematic cases. A striking example of the quasi-kinematic method is provided by magnetic buoyancy-driven flows that produce an alpha effect and turbulent diffusion.

17 pages, 6 figures, topical issue of Physica Scripta on turbulent mixing and beyond

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Cited by in corpus (11)

• Dynamo theories
• Advances in mean-field dynamo theory and applications to astrophysical turbulence
• Turbulent transport coefficients in spherical wedge dynamo simulations of solar-like stars
• Alpha effect due to buoyancy instability of a magnetic layer
• Polar branches of stellar activity waves: dynamo models and observations
• Diffusion of large-scale magnetic fields by reconnection in MHD turbulence
• Magnetic induction maps in a magnetized spherical Couette flow experiment
• Negative magnetic eddy diffusivities from test-field method and multiscale stability theory
• Long-term variations of turbulent transport coefficients in a solar-like convective dynamo simulation
• The nature of mean-field generation in three classes of optimal dynamos
• Investigating global convective dynamos with mean-field models: full spectrum of turbulent effects required