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Phase mixing of three-dimensional MHD pulse in a transversely inhomogeneous medium

Tsiklauri, D, Nakariakov, VM and Rowlands, G 2003, 'Phase mixing of three-dimensional MHD pulse in a transversely inhomogeneous medium' , Astronomy and Astrophysics, 400 (3) , pp. 1051-1055.

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Abstract

Phase mixing of a three dimensional magnetohydrodynamic (MHD) pulse is studied in the compressive, three-dimensional (without an ignorable coordinate) regime. It is shown that the efficiency of decay of an Alfvénic part of a compressible MHD pulse is related linearly to the degree of localization of the pulse in the homogeneous transverse direction. In the developed stage of phase mixing (for large times), coupling to its compressive part does not alter the power-law decay of an Alfvénic part of a compressible MHD pulse. The same applies to the dependence upon the resistivity of the Alfvénic part of the pulse. All this implies that the dynamics of Alfvén waves can still be qualitatively understood in terms of the previous 2.5D models. Thus, the phase mixing remains a relevant paradigm for the coronal heating applications in the realistic 3D geometry and compressive plasma.

Item Type: Article
Uncontrolled Keywords: magnetohydrodynamics (MHD) - waves - Sun: activity - Sun: Corona
Themes: Subjects / Themes > Q Science > QB Astronomy
Subjects outside of the University Themes
Schools: Colleges and Schools > College of Science & Technology
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering
Journal or Publication Title: Astronomy and Astrophysics
Publisher: Springer Verlag
Refereed: Yes
ISSN: 0004-6361
Depositing User: H Kenna
Date Deposited: 03 Sep 2007 15:38
Last Modified: 20 Aug 2013 16:47
URI: http://usir.salford.ac.uk/id/eprint/384

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