Large-scale dynamo action driven by velocity shear and rotating convection.
By incorporating a large-scale shear flow into turbulent rotating convection, we show that a sufficiently strong shear can promote dynamo action in flows that are otherwise nondynamos. Our results are consistent with a dynamo driven either by the shear-current effect or by a fluctuating alpha effect interacting with the shear, but not with either a classical alpha(2) or alpha omega dynamo.
Hughes
David W
DW
Department of Applied Mathematics, University of Leeds, Leeds LS2 9JT, UK. d.w.hughes@leeds.ac.uk
Proctor
Michael R E
MR