Shear dynamo problem: quasilinear kinematic theory

Sridhar, S.; Subramanian, Kandaswamy

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3793

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DC Field	Value	Language
dc.contributor.author	Sridhar, S.	-
dc.contributor.author	Subramanian, Kandaswamy	-
dc.date.accessioned	2009-07-15T06:48:00Z	-
dc.date.available	2009-07-15T06:48:00Z	-
dc.date.issued	2009-04	-
dc.identifier.citation	Physical Review E, 2009, Vol.79, p045305	en
dc.identifier.issn	E-ISSN: 1550-2376	-
dc.identifier.issn	P-ISSN: 1539-3755	-
dc.identifier.uri	http://hdl.handle.net/2289/3793	-
dc.description	Open Access	en
dc.description.abstract	Large-scale dynamo action due to turbulence in the presence of a linear shear flow is studied. Our treatment is quasilinear and kinematic but is nonperturbative in the shear strength. We derive the integrodifferential equation for the evolution of the mean magnetic field by systematic use of the shearing coordinate transformation and the Galilean invariance of the linear shear flow. For nonhelical turbulence the time evolution of the cross-shear components of the mean field does not depend on any other components excepting themselves. This is valid for any Galilean-invariant velocity field, independent of its dynamics. Hence the shear-current assisted dynamo is essentially absent, although large-scale nonhelical dynamo action is not ruled out.	en
dc.language.iso	en	en
dc.publisher	American Physical Society	en
dc.relation.uri	http://dx.doi.org/ 10.1103/PhysRevE.79.045305	en
dc.relation.uri	http://arxiv.org/abs/0812.3269	en
dc.rights	2009 The American Physical Society	en
dc.subject	computational fluid dynamics	en
dc.subject	integro-differential equations	en
dc.subject	invariance	en
dc.subject	magnetohydrodynamics	en
dc.subject	shear turbulence	en
dc.title	Shear dynamo problem: quasilinear kinematic theory	en
dc.type	Article	en
Appears in Collections:	Research Papers (A&A)

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