Abstract
The effect of shear on the growth of large scale magnetic fields in helical turbulence is investigated. The resulting large-scale magnetic field is also helical and continues to evolve, after saturation of the small scale field, on a slow resistive time scale. This is a consequence of magnetic helicity conservation. Because of shear, the time scale needed to reach an equipartition-strength large scale field is shortened proportionally to the ratio of the resulting toroidal to poloidal large scale fields.
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Bigazzi, A., Brandenburg, A., Subramanian, K. (2001). Sheared Helical Turbulence and the Helicity Constraint in Large-Scale Dynamos. In: Chossat, P., Ambruster, D., Oprea, I. (eds) Dynamo and Dynamics, a Mathematical Challenge. NATO Science Series, vol 26. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0788-7_14
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DOI: https://doi.org/10.1007/978-94-010-0788-7_14
Publisher Name: Springer, Dordrecht
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