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Hall effects on the steady structure of the rotational layer at the dayside magnetopause
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
2007 (English)In: Physics of Plasmas, ISSN 1070-664X, E-ISSN 1089-7674, Vol. 14Article in journal (Refereed) Published
Abstract [en]

The influence of the Hall term in the generalized Ohm's law on the large-scale plasma flow during conditions of ongoing magnetic reconnection at the dayside magnetopause (MP) is investigated. Of special interest is the plasma flow behavior during the transition of the MP transition layer as the Hall effect grows in proportion to the viscous-resistive effects. The governing equations are solved approximately by an ordinary perturbation expansion in orders of large Reynolds and Lundqvist numbers. It is shown that the flow pattern is strongly dependent on the magnitude of the Hall parameter; as it approaches zero, the viscous-resistive solution is obtained, while for an ordering of the same magnitude as the resistivity/viscosity, the Hall effect begins to affect the flow structure severely. For an increasing value on the Hall parameter, oscillations are brought into the system, an effect that is enhanced with the magnitude of the Hall parameter. Furthermore, it is shown that as the Hall effect begins to dominate, the transition layer thickens.

Place, publisher, year, edition, pages
2007. Vol. 14
Research subject
Fluid Mechanics
URN: urn:nbn:se:ltu:diva-5022DOI: 10.1063/1.2786071Local ID: 30b2ad70-9446-11dc-b13a-000ea68e967bOAI: diva2:977896
Validerad; 2007; Bibliografisk uppgift: Paper id:: 102905; 20071116 (lgwe)Available from: 2016-09-29 Created: 2016-09-29Bibliographically approved

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Westerberg, Lars-GöranÅkerstedt, Hans
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