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Generation of magnetic field by combined action of turbulence and shear.

Abstract:

The feasibility of a mean-field dynamo in nonhelical turbulence with a superimposed linear shear is studied numerically in elongated shearing boxes. Exponential growth of the magnetic field at scales much larger than the outer scale of the turbulence is found. The characteristic scale of the field is lB proportional S(-1/2) and the growth rate is gamma proportional S, where S is the shearing rate. This newly discovered shear dynamo effect potentially represents a very generic mechanism for ge...

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Publication status:
Published

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Journal:
Physical review letters
Volume:
100
Issue:
18
Pages:
184501
Publication date:
2008-05-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:35165b64-7af6-48b2-b1da-d06e799be872
Source identifiers:
160810
Local pid:
pubs:160810
Language:
English
Keywords:

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