| Magnetic dynamo action at low magnetic Prandtl numbers. | |
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MedLine Citation:
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PMID: 21231310 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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Amplification of magnetic field due to kinematic turbulent dynamo action is studied in the regime of small magnetic Prandtl numbers. Such a regime is relevant for planets and stars interiors, as well as for liquid-metal laboratory experiments. A comprehensive analysis based on the Kazantsev-Kraichnan model is reported, which establishes the dynamo threshold and the dynamo growth rates for varying kinetic helicity of turbulent fluctuations. It is proposed that in contrast with the case of large magnetic Prandtl numbers, the kinematic dynamo action at small magnetic Prandtl numbers is significantly affected by kinetic helicity, and it can be made quite efficient with an appropriate choice of the helicity spectrum. |
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Authors:
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Leonid M Malyshkin; Stanislav Boldyrev |
Publication Detail:
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Type: Journal Article Date: 2010-11-17 |
Journal Detail:
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Title: Physical review letters Volume: 105 ISSN: 1079-7114 ISO Abbreviation: Phys. Rev. Lett. Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2011-01-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0401141 Medline TA: Phys Rev Lett Country: United States |
Other Details:
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Languages: eng Pagination: 215002 Citation Subset: - |
Affiliation:
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Department of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637, USA. leonmal@uchicago.edu |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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