Magnetic-flux transport by a convecting layer - Topological, geometrical and compressible phenomena

Mathematics – Logic

Scientific paper

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Benard Cells, Convective Flow, Magnetic Field Configurations, Magnetic Flux, Solar Atmosphere, Solar Magnetic Field, Compressibility Effects, Flow Velocity, Magnetic Induction, Magnetic Pumping, Topology

Scientific paper

A previously developed computer program is employed to extend the Drobyshevski and Yuferev (1974) numerical calculations of the redistribution of magnetic flux by a Benard layer with square planform cells to higher electrical conductivity values and to other velocity patterns. Reconnection is found to lead to overall field enhancement, and although the energy is greater at the bottom, as much unsigned flux is noted in the upper as in the lower half of the layer. Compressible velocity patterns, however, can concentrate flux at their bases. It is also shown for incompressible flows that topological effects dominate geometrical ones as magnetic Reynolds number increases beyond about 50.

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