On the dynamic interaction between magnetic fields and convection

Details On the dynamic interaction between magnetic fields and convection On the dynamic interaction between magnetic fields and convection

Jan 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978mnras.182..189p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 182, Jan. 1978, p. 189-208.

Physics

48

Convective Flow, Magnetohydrodynamic Flow, Photosphere, Solar Granulation, Solar Magnetic Field, Boussinesq Approximation, Conducting Fluids, Kinetic Energy, Magnetic Diffusion, Solar Physics, Two Dimensional Models

Scientific paper

A simple two-dimensional model of convection in an electrically conducting Boussinesq fluid with an externally imposed magnetic field has been investigated in a series of numerical experiments. Convection is driven by horizontal gradients in an imposed temperature field which is unaffected by the motion. The transition from a kinematic to a dynamic regime is studied: magnetic flux is concentrated into ropes and the maximum field strength depends on the ratio of the viscous and magnetic diffusivities. The magnetic energy density in the ropes is unrelated to, and may be much greater than, the kinetic energy density outside. These results are relevant to the interaction between small-scale magnetic fields and photospheric granulation in the sun.

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