Siphon flows in coronal loops. I - Adiabatic flow

Details Siphon flows in coronal loops. I - Adiabatic flow Siphon flows in coronal loops. I - Adiabatic flow

Mar 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980soph...65..251c&link_type=abstract

Solar Physics, vol. 65, Mar. 1980, p. 251-269. Research supported by the Science Research Council.

Other

81

Adiabatic Flow, Solar Corona, Solar Physics, Solar Wind, Equations Of Motion, Equations Of State, Isothermal Flow, Loops, Pipe Flow, Pressure Gradients, Shock Waves, Solar Magnetic Field, Subsonic Flow, Temperature Distribution

Scientific paper

The paper considers subsonic and shocked flows in coronal loops. The possibility of steady isothermal and adiabatic flows in coronal loops driven by a pressure difference between the loop feet is examined; for a symmetric loop the flow becomes supersonic at the summit and is then retarded by a shock wave at some point on the down-flowing leg. Asymmetric loops, whose cross-sectional area increases or decreases in the flow direction, have a wide range of subsonic and shocked flows; converging loops have subsonic flows if the pressure difference between the footpoints is small, but shocked flows if the pressure difference is large enough. Diverging loops show only shocked flows towards a low pressure footpoint, but can have either subsonic or shocked flow towards a high pressure footpoint.

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