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Buoyant magnetic flux tubes. II. Three-dimensional behavior in granules and supergranules

Technical Report ·
OSTI ID:6055868
; ;
A simple model is used to study the interaction of isolated magnetic flux tubes with convection in the sun. Convective motion in granules and supergranules is represented by prescribed flows in three-dimensional cells with square cross sections and thin flux tubes mode under the action of magnetic buoyance, Lorentz curvature forces, and aerodynamic drag. Inflow at the base of a cell competes with outflow at its upper surface; small flux tubes tend to be swept to the cell boundaries while larger, more buoyant tubes are dragged to the axis of the cell. These results are compared with recent observations of small-scale granular and intergranular magnetic fields.
Research Organization:
Air Force Geophysics Lab., Hanscom AFB, MA (USA)
OSTI ID:
6055868
Report Number(s):
AD-A-162438/6/XAB; AFGL-TR-85-0303
Country of Publication:
United States
Language:
English

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Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
CONVECTION
ENERGY TRANSFER
HEAT TRANSFER
LORENTZ FORCE
MAGNETIC FIELDS
MAIN SEQUENCE STARS
MASS TRANSFER
MOTION
SOLAR ACTIVITY
SOLAR ATMOSPHERE
SOLAR GRANULATION
STARS
SUN
SURFACES