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| Titel |
Turning the resistive MHD into a stochastic field theory |
| VerfasserIn |
M. Materassi, G. Consolini |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 15, no. 4 ; Nr. 15, no. 4 (2008-08-27), S.701-709 |
| Datensatznummer |
250012722
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| Publikation (Nr.) |
 copernicus.org/npg-15-701-2008.pdf |
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| Zusammenfassung |
| Classical systems stirred by random forces of given statistics may be
described via a path integral formulation in which their degrees of freedom
are stochastic variables themselves, undergoing a multiple-history
probabilistic evolution. This framework seems to be easily applicable to
resistive Magneto-Hydro-Dynamics (MHD). Indeed, MHD equations form a dynamic
system of classical variables in which the terms representing the density,
the pressure and the conductivity of the plasma are irregular functions of
space and time when turbulence occurs. By treating those irregular terms as
random stirring forces, it is possible to introduce a Stochastic Field Theory
which should represent correctly the impulsive phenomena caused by the spece-
and time-irregularity of plasma turbulence. This work is motivated by the
recent observational evidences of the crucial role played by stochastic
fluctuations in space plasmas. |
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