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Competing kinematic dynamo mechanisms in rotating convection with shear

Published online by Cambridge University Press:  12 August 2011

Michael R. E. Proctor  and
David W. Hughes
Michael R. E. Proctor
Affiliation:
Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge CB3 0WA, U.K. email: [email protected]
David W. Hughes
Affiliation:
Department of Applied Mathematics, University of Leeds, Leeds LS2 9JT, U.K. email: [email protected]
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Abstract

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Following earlier work by Hughes & Proctor (2009) on the role of velocity shear in convectively driven dynamos, we present preliminary results on the nature of dynamo action due to modified flows derived by filtration from the full convective flow. The results suggest that filtering the flow fields has surprisingly little effect on the dynamo growth rates.

Keywords

convectioninstabilitiesmagnetic fieldsMHDSun: activitySun: magnetic fieldsSun: rotation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S271: Astrophysical Dynamics: From Stars to Galaxies , June 2010 , pp. 239 - 246
Copyright
Copyright © International Astronomical Union 2011

References

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Hughes, D. W. & Cattaneo, F. 2008, J. Fluid Mech., 594, 445CrossRefGoogle Scholar
Hughes, D. W. & Proctor, M. R. E. 2009, Phys. Rev. Lett., 102: 044501CrossRefGoogle Scholar
Moffatt, H. K. 1978, Magnetic Field Generation in Electrically Conducting Fluids. Cambridge: University PressGoogle Scholar