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A Taylor-Couette dynamo

Lookup NU author(s): Ashley Willis, Professor Carlo Barenghi

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Abstract

Recent experiments have shown that it is possible to study a fundamental astrophysical process such as dynamo action in controlled laboratory conditions using simple MHD flows. In this paper we explore the possibility that Taylor-Couette flow, already proposed as a model of the magneto-rotational instability of accretion discs, can sustain generation of a magnetic field. Firstly, by solving the kinematic dynamo problem, we identify the region of parameter space where the magnetic field's growth rate is higher. Secondly, by solving simultaneously the coupled nonlinear equations which govern velocity field and magnetic field, we find a self-consistent nonlinearly saturated dynamo.

Publication metadata

Author(s): Willis AP, Barenghi CF

Publication type: Article

Publication status: Published

Journal: Astronomy and Astrophysics

Year: 2002

Volume: 393

Issue: 1

Pages: 339-343

ISSN (print): 0004-6361

ISSN (electronic): 1432-0746

Publisher: EDP Sciences

URL: http://dx.doi.org/10.1051/0004-6361:20021007

DOI: 10.1051/0004-6361:20021007

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