Flow in coronal loops with a mass source

Details Flow in coronal loops with a mass source Flow in coronal loops with a mass source

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...88..193n&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 88, Oct. 1983, p. 193-209. Research supported by the Consiglio Nazionale delle Ricerche and

Physics

6

Coronal Loops, Magnetohydrodynamic Flow, Solar Corona, Density Distribution, Mass Flow, Topology

Scientific paper

This research studies the flow of plasma inside a coronal loop in which an injection of plasma through the lateral surface is permitted. The flow is assumed steady and polytropic. The problem covers two cases: (a) upflow at one footpoint, downflow at the other; (b) downflow at both footpoints. The first case can be shown to be quite similar to that of a mass-conserving flow with variable cross section; the second, instead, is characterized by solutions with a different type of topology; its main new feature is the obvious fact that all the solutions pass through a single point going from negative to positive velocities. In this second case the density ratio between footpoints and top can be much smaller than in a mass conserving flow. This can explain some properties of observed loops.

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