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Large-scale magnetic field generation by randomly forced shearing waves

Abstract:

A rigorous theory for the generation of a large-scale magnetic field by random nonhelically forced motions of a conducting fluid combined with a linear shear is presented in the analytically tractable limit of low magnetic Reynolds number (Rm) and weak shear. The dynamo is kinematic and due to fluctuations in the net (volume-averaged) electromotive force. This is a minimal proof-of-concept quasilinear calculation aiming to put the shear dynamo, a new effect recently found in numerical experim...

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Journal:
Physical Review Letters
Volume:
107
Issue:
25
Publication date:
2011-12-14
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:c2ecf4a6-487a-4908-926b-a1e9312055b2
Source identifiers:
222486
Local pid:
pubs:222486
Language:
English

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