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| Titel: |
Covariant description of non-relativistic magnetohydrodynamics |
| Auteur: |
Roberts, Paul H. Soward, Andrew M. |
| Verschenen in: |
Geophysical & astrophysical fluid dynamics |
| Paginering: | Jaargang 100 (2006) nr. 4-5 pagina's 485-502 |
| Jaar: |
2006-08-01 |
| Inhoud: |
It has long been known that, when diffusive effects are relatively unimportant, wave motions in rotating fluids can conveniently be described using a hybrid Eulerian/Lagrangian formalism in which the trajectory of a fluid particle is mapped onto a suitably chosen reference trajectory. The transformed equations can represent a mapping to general, time-dependent, non-Euclidean coordinates, for which the techniques of general tensor analysis can be applied. The method is demonstrated here for magnetohydrodynamic (MHD) systems. A generalization of the alpha-effect of mean field electrodynamics is derived, in which ohmic diffusion creates electric currents from magnetic field in the reference system. An analogous effect is identified in which viscous diffusion creates vorticity from velocity in the reference system. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 2 van 11 gevonden artikelen
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