Large-scale dynamo action driven by velocity shear and rotating convection

By incorporating a large-scale shear flow into turbulent rotating convection, we show that a sufficiently strong shear can promote dynamo action in flows that are otherwise nondynamos. Our results are consistent with a dynamo driven either by the shear-current effect or by a fluctuating alpha effect...

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Veröffentlicht in:	Physical review letters 2009-01, Vol.102 (4), p.044501-044501, Article 044501
Hauptverfasser:	Hughes, David W, Proctor, Michael R E
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Sprache:	eng
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creator	Hughes, David W Proctor, Michael R E
description	By incorporating a large-scale shear flow into turbulent rotating convection, we show that a sufficiently strong shear can promote dynamo action in flows that are otherwise nondynamos. Our results are consistent with a dynamo driven either by the shear-current effect or by a fluctuating alpha effect interacting with the shear, but not with either a classical alpha(2) or alpha omega dynamo.
doi_str_mv	10.1103/physrevlett.102.044501
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title	Large-scale dynamo action driven by velocity shear and rotating convection
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