Journal
PHYSICAL REVIEW LETTERS
Volume 107, Issue 25, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.255004
Keywords
-
Categories
Funding
- NSF [AST-0807432]
- NASA [NNX08AH24G]
- STFC
- Leverhulme Trust Network for Magnetized Plasma Turbulence
- STFC [ST/F002505/2] Funding Source: UKRI
- NASA [100270, NNX08AH24G] Funding Source: Federal RePORTER
Ask authors/readers for more resources
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 experiments, on a firm theoretical footing. Numerically observed scalings of the wave number and growth rate of the fastest-growing mode, previously not understood, are derived analytically. The simplicity of the model suggests that shear dynamo action may be a generic property of sheared magnetohydrodynamic turbulence.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available