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Magnetoacoustic Heating of Plasma Caused by Periodic MagnetosoundPerturbations with Discontinuities in a Quasi-Isentropic Magnetic Gas
Abstract
The magnetoacoustic heating of plasma by harmonic or periodic saw-tooth perturbations at a trans-ducer is theoretically studied. The planar fast and slow magnetosound waves are considered. The wavevector may form an arbitrary angleθwith the equilibrium straight magnetic field. In view of variableθand plasma-β, the description of magnetosound perturbations and appropriate magnetosound heatingis fairly difficult. The scenario of heating depends not only on plasma-βandθ, but also on a balancebetween nonlinear attenuation at the shock front and inflow of energy into a system. Under some condi-tions, the average over the magnetosound period force of heating may tend to a positive or negative limit,tend to zero, or may remain constant when the distance from a transducer tends to infinity. Dynamicsof temperature specifying heating differs in thermally stable and unstable cases and occurs unusually inthe isentropically unstable flows.
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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Archives of Acoustics
no. 45,
pages 241 - 251,
ISSN: 0137-5075 - Language:
- English
- Publication year:
- 2020
- Bibliographic description:
- Perelomova A.: Magnetoacoustic Heating of Plasma Caused by Periodic MagnetosoundPerturbations with Discontinuities in a Quasi-Isentropic Magnetic Gas// Archives of Acoustics -Vol. 45,iss. 2 (2020), s.241-251
- DOI:
- Digital Object Identifier (open in new tab) 10.24425/aoa.2020.133145
- Verified by:
- Gdańsk University of Technology
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