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Amplification of Magnetic Fields by Compressible Convection

Published online by Cambridge University Press:  04 August 2017

M.R.E. Proctor
M.R.E. Proctor*
Affiliation:
Dept. of Applied Mathematics and Theoretical Physics, University of Cambridge, England

Abstract

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Previous work on the concentration of magnetic field by cellular convection in a Boussinesq fluid is extended to a perfect gas, so that the gas pressure is reduced in the presence of a strong magnetic field. Attention is focussed on 2-dimensional flows and on the case of small layer depths, so that the pressure is effectively uniform in field free regions. It is shown that if the field is sufficiently strong, flux sheets with significantly reduced pressures and densities may form. Criteria are established which measure the relative importance of this effect to the more familiar ‘magnetic drag’ which acts to prevent the concentration of field by generating counter vorticity.

Type
III. Theory of Stellar Magnetic Field Generation
Information
Symposium - International Astronomical Union , Volume 102: Solar and Stellar Magnetic Fields: Origins and Coronal Effects , 1983 , pp. 301 - 305
Copyright
Copyright © Reidel 1983 

References

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