Dissipative stagnation-point flows at a current sheet with shear in the plasma velocity

Details Dissipative stagnation-point flows at a current sheet with shear in the plasma velocity Dissipative stagnation-point flows at a current sheet with shear in the plasma velocity

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jatp...53.1081b&link_type=abstract

(Solar-terrestrial physics; International SCOSTEP Symposium, 7th, The Hague, Netherlands, June 25-30, 1990, Selected Papers. A92

Physics

5

Current Sheets, Energy Dissipation, Flow Velocity, Magnetohydrodynamic Waves, Space Plasmas, Stagnation Point, Magnetic Effects, Magnetopause, Magnetosheath, Plasma-Electromagnetic Interaction, Solar Terrestrial Interactions, Transport Properties

Scientific paper

The process of magnetic field annihilation is described using the framework provided by the MHD equations. An incompressible plasma is considered, and anomalous transport parameters in the form of uniform resistivity and viscosity are included. The planar stagnation-point geometry which is presented models a current sheet separating two counterstreaming plasmas. One possible application of this configuration is the magnetopause, where coupling processes give rise to an exchange of energy and momentum between the magnetosheath and magnetospheric plasma. The possibility is allowed of a generally inclined plasma flow toward the current sheet so that, for example, the flow in the neighborhood of the earth's magnetospheric cusp and flank regions can be modeled as well as the subsolar region. A distinguishing feature of the exact solutions of the MHD equations which are presented is that the flow is not irrotational and therefore viscous forces play an important role in the plasma behavior.

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