Energy conversions and storage caused by an unsteady poloidal flow in active solar regions

Details Energy conversions and storage caused by an unsteady poloidal flow in active solar regions Energy conversions and storage caused by an unsteady poloidal flow in active solar regions

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ap%26ss.146...59l&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 146, no. 1, July 1988, p. 59-69.

Astronomy and Astrophysics

Astrophysics

2

Magnetohydrodynamic Flow, Meridional Flow, Solar Activity, Solar Magnetic Field, Coupled Modes, Energy Conversion, Solar Flares, Solar Rotation, Unsteady Flow

Scientific paper

Coupling processes between a magnetic field and an unsteady plasma motion are discussed, and the features of energy storage and conversions in active region are analyzed. It is shown that, in order to analyze the energy storage, the static force-free field is insufficient and the addition of poloidal plasma motion must be considered. Because the unsteady poloidal flow is added and coupling occurs between the magnetic field and both the toroidal and the poloidal plasma flows, an unsteady process is maintained which changes the force-free factor with time. Hence, the energy in the lower levels can be transferred to the upper levels, and a considerable energy can be stored in the active regional. Another storage process is given which is due to the pure poloidal flow. It is shown that even if there is no twisted magnetic line of force, the energy in the lower levels may still be transferred to the upper levels and stored there.

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