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Nearly incompressible fluids. II - Magnetohydrodynamics, turbulence, and wavesThe theory of nearly incompressible (NI) fluid dynamics developed previously for hydrodynamics is extended to magnetohydrodynamics (MHD). Based on a singular expansion technique, modified systems of fluid equations are obtained for which the effects of compressibility are admitted only weakly in terms of the different possible incompressible solutions. NI MHD represents the interface between the compressible and incompressible magnetofluid descriptions in the subsonic regime. It is shown that three distinct NI descriptions exist corresponding to each of the three possible plasma beta regimes. The detailed theory of weakly compressible corrections to the various incompressible MHD descriptions is presented, and the implications for the solar wind are discussed.
Document ID
19930037068
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Zank, G. P.
(NASA Headquarters Washington, DC United States)
Matthaeus, W. H.
(Delaware Univ. Newark, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Physics of Fluids A
Volume: 5
Issue: 1
ISSN: 0899-8213
Subject Category
Plasma Physics
Accession Number
93A21065
Funding Number(s)
CONTRACT_GRANT: NAGW-2076
CONTRACT_GRANT: NSF ATM-89-13627
Distribution Limits
Public
Copyright
Other

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