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The alpha-effect in rotating convection: size matters



The results of numerical simulations of convection in a rotating layer are used to compute the α-effect of mean-field electrodynamics. The computations are carried out for different system sizes. It is found that the outcomes can depend critically on the system size, and that physically meaningful results can only be obtained if the system size is large compared with the typical eddy size.



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Cattaneo, F. & Hughes, D. W. 2006 Dynamo action in a rotating convective layer. J. Fluid Mech. 553, 401418.
Cattaneo, F., Emonet, T. & Weiss, N. O. 2003 On the interaction between convection and magnetic fields. Astrophys. J. 588, 11831198.
Chandrasekhar, S. 1961 Hydrodynamic and Hydromagnetic Stability. Clarendon.
Childress, S. & Gilbert, A. D. 1995 Stretch, Twist, Fold: The Fast Dynamo. Springer.
Childress, S. & Soward, A. M. 1972 Convection driven hydromagnetic dynamo. Phys. Rev. Lett. 29, 837839.
Courvoisier, A., Hughes, D. W. & Tobias, S. M. 2008 The influence of spatial phase demodulations on the α-effect and turbulent diffusion (in preparation).
Eltayeb, I. A. & Roberts, P. H. 1970 On the hydromagnetics of rotating fluids. Astrophys. J. 162, 699701.
Fautrelle, Y. & Childress, S. 1982 Convective dynamos with intermediate and strong fields. Geophys. Astrophys. Fluid Dyn. 22, 235279.
Jones, C. A. & Roberts, P. H. 2000 Convection-driven dynamos in a rotating plane layer. J. Fluid Mech. 404, 311343.
Pétrélis, F. & Fauve, S. 2006 Inhibition of the dynamo effect by phase fluctuations. Europhys. Lett. 76, 602608.
Rotvig, J. & Jones, C. A. 2002 Rotating convection-driven dynamos at low Ekman number. Phys. Rev. E 66, 056308:115.
Soward, A. M. 1974 A convection driven dynamo I. The weak field case. Phil. Trans. R. Soc. Lond. A 275, 611651.
St.Pierre, M. G. 1993 The strong field branch of the Childress-Soward dynamo. In Theory of Solar and Planetary Dynamos (ed. Proctor, M. R. E., Matthews, P. C. & Rucklidge, A. M.), pp. 295302. Cambridge University Press.
Stellmach, S. & Hansen, U. 2004 Cartesian convection driven dynamos at low Ekman number. Phys. Rev. E 70, 056312:116.
Vainshtein, S. I. & Kitchatinov, L. L. 1986 The dynamics of magnetic fields in a highly conducting turbulent medium and the generalized Kolmogorov-Fokker-Planck equations. J. Fluid Mech. 168, 7387.
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The alpha-effect in rotating convection: size matters



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