Wave resonances and the partition of energy in ideal compressible magnetohydrodynamic fluids

Zorzan, C and Cally, P 2012, 'Wave resonances and the partition of energy in ideal compressible magnetohydrodynamic fluids', Physics of Plasmas, vol. 19, pp. 112104-1-112104-14.


Document type: Journal Article
Collection: Journal Articles

Title Wave resonances and the partition of energy in ideal compressible magnetohydrodynamic fluids
Author(s) Zorzan, C
Cally, P
Year 2012
Journal name Physics of Plasmas
Volume number 19
Start page 112104-1
End page 112104-14
Total pages 15
Publisher Ameriican Institute of Physics
Abstract Phase mixing and resonant absorption are two processes that have been under scrutiny for some time because of their role in wave damping and in providing a mechanism for heating space and laboratory plasmas. The accumulation or absorption of energy that develops within a resonant layer is usually attributed to a logarithmic singularity, but it will be shown that this build up of energy is inextricably tied to a discontinuity in the fluid displacement at the resonant point. This change in the dynamics of the problem will be examined by establishing a partition of energy that identifies and isolates the individual resonances within the fluid. The partition is based on a variational description of the Fourier transformed equations and is guided by an electrical model of the MHD system that not only illustrates the resonant structure threading the fluid but also exposes the mechanism driving the resonant absorption process. A simplified version of this model is then constructed to help determine the approximate rate of energy absorption.
Subject Plasma Physics; Fusion Plasmas; Electrical Discharges
Keyword(s) Fourier transforms
plasma magnetohydrodynamics
DOI - identifier 10.1063/1.4764289
Copyright notice © 2012 American Institute of Physics
ISSN 1070-664X
Versions
Version Filter Type
Altmetric details:
Access Statistics: 187 Abstract Views  -  Detailed Statistics
Created: Tue, 04 Dec 2012, 09:34:00 EST by Catalyst Administrator
© 2014 RMIT Research Repository • Powered by Fez SoftwareContact us