Nonlinear convection in an imposed horizontal magnetic field

Details Nonlinear convection in an imposed horizontal magnetic field Nonlinear convection in an imposed horizontal magnetic field

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983gapfd..25..259a&link_type=abstract

Geophysical and Astrophysical Fluid Dynamics (ISSN 0309-1929), vol. 25, no. 4, Aug. 1983, p. 259-292.

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14

Boussinesq Approximation, Convective Flow, Late Stars, Magnetohydrodynamic Flow, Stellar Magnetic Fields, Computational Fluid Dynamics, Magnetic Flux, Oscillating Flow, Stellar Models, Stellar Oscillations

Scientific paper

Nonlinear two-dimensional magnetoconvection, with a Boussinesq fluid driven across the field-lines, is taken as a model for giant-cell convection in the sun and late-type stars. A series of numerical experiments shows the sensitivity of the horizontal scale of convection to the applied field and to the Rayleigh number R. Overstable oscillations occur in cells as broad as they are deep, but increasing R leads to steady motions of much greater wavelength. Purely geometrical effects can cause oscillation: this work implies that strong horizontal field will in general lead to time-dependent convection.

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