Solar wind: Internal parameters driven by external source

Details Solar wind: Internal parameters driven by external source Solar wind: Internal parameters driven by external source

Jun 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995sowi.confr..75c&link_type=abstract

Saint Petersburg State Univ., International Solar Wind 8 Conference, p. 75

Computer Science

Interplanetary Medium, Solar Wind, Mean Free Path, Plasma Conductivity, Thermal Conductivity, Electric Fields, Irreversible Processes, Low Conductivity, Magnetohydrodynamics, Thermodynamic Equilibrium, Internal Energy, Plasma Interactions

Scientific paper

A new concept interpreting solar wind parameters is suggested. The process of increasing twofold of a moving volume in the solar wind (with energy transfer across its surface which is comparable with its whole internal energy) is a more rapid process than the relaxation for the pressure. Thus, the solar wind is unique from the point of view of thermodynamics of irreversible processes. The presumptive source of the solar wind creation - the induction electric field of the solar origin - has very low entropy. The state of interplanetary plasma must be very far from the thermodynamic equilibrium. Plasma internal energy is contained mainly in non-degenerate forms (plasma waves, resonant plasma oscillations, electric currents). Microscopic oscillating electric fields in the solar wind plasma should be about 1 V/m. It allows one to describe the solar wind by simple dissipative MHD equations with small effective mean free path (required for hydrodynamical description), low value of electrical conductivity combined with very big apparent thermal conductivity (required for observed solar wind acceleration). These internal parameters are interrelated only due to their origin: they are externally driven. Their relation can change during the interaction of solar wind plasma with an obstacle (planet, spacecraft). The concept proposed can be verified by the special electric field measurements, not ruining the primordial plasma state.

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