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Collisionless solar wind protons: A comparison of kinetic and hydrodynamic descriptionsKinetic and hydrodynamic descriptions of a collisionless solar wind proton gas are compared. Heat conduction and viscosity are neglected in the hydrodynamic formulation but automatically included in the kinetic formulation. The results of the two models are very nearly the same, indicating that heat conduction and viscosity are not important in the solar wind proton gas beyond about 0.1 AU. It is concluded that the hydrodynamic equations provide a valid description of the collisionless solar wind protons, and hence that future models of the quiet solar wind should be based on a hydrodynamic formulation.
Document ID
19720012210
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Leer, E. (California Univ. La Jolla, CA, United States)
Holzer, T. E. (NOAA Boulder, Colo., United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1971
Subject Category
Space Radiation
Report/Patent Number
NASA-CR-125802
Accession Number
72N19860
Funding Number(s)
CONTRACT_GRANT: NGR-05-009-081
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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