Siphon flows in isolated magnetic flux tubes. II. Adiabatic flows

Journal Article · Wed Feb 01 00:00:00 EST 1989 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/167169· OSTI ID:6018688

Montesinos, B; Thomas, J H

This paper extends the study of steady siphon flows in isolated magnetic flux tubes surrounded by field-free gas to the case of adiabatic flows. The basic equations governing steady adiabatic siphon flows in a thin, isolated magnetic flux tube are summarized, and qualitative features of adiabatic flows in elevated, arched flux tubes are discussed. The equations are then cast in nondimensional form and the results of numerical computations of adiabatic siphon flows in arched flux tubes are presented along with comparisons between isothermal and adiabatic flows. The effects of making the interior of the flux tube hotter or colder than the surrounding atmosphere at the upstream footpoint of the arch is considered. In this case, is it found that the adiabatic flows are qualitatively similar to the isothermal flows, with adiabatic cooling producing quantitative differences. Critical flows can produce a bulge point in the rising part of the arch and a concentration of magnetic flux above the bulge point. 15 references.

• Research Organization: Oxford Univ. (UK); Oxford Univ. (England)
• OSTI ID: 6018688
• Journal Information: Astrophys. J.; (United States), Vol. 337
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
GAS FLOW
ADIABATIC PROCESSES
SOLAR ATMOSPHERE
MAGNETIC FLUX
COMPARATIVE EVALUATIONS
COOLING
EQUATIONS
MAGNETIC FIELDS
MAGNETOHYDRODYNAMICS
VELOCITY
ATMOSPHERES
FLUID FLOW
FLUID MECHANICS
HYDRODYNAMICS
MECHANICS
640104* - Astrophysics & Cosmology- Solar Phenomena