Magnetoacoustic Heating of Plasma Caused by Periodic Magnetosound Perturbations with Discontinuities in a Quasi-Isentropic Magnetic Gas
The magnetoacoustic heating of a plasma by harmonic or periodic saw-tooth perturbations at a transducer is theoretically studied. The planar fast and slow magnetosound waves are considered. The wave vector may form an arbitrary angle θ with the equilibrium straight magnetic strength. In view of vari...
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Institute of Fundamental Technological Research Polish Academy of Sciences
2020-04-01
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| Series: | Archives of Acoustics |
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| Online Access: | https://acoustics.ippt.pan.pl/index.php/aa/article/view/2715 |
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| author | Anna PERELOMOVA |
| author_facet | Anna PERELOMOVA |
| author_sort | Anna PERELOMOVA |
| collection | DOAJ |
| description | The magnetoacoustic heating of a plasma by harmonic or periodic saw-tooth perturbations at a transducer is theoretically studied. The planar fast and slow magnetosound waves are considered. The wave vector may form an arbitrary angle θ with the equilibrium straight magnetic strength. In view of variable θ and plasma-β, the description of magnetosound perturbations and relative magnetosound heating is fairly difficult. The scenario of heating depends not only on plasma-β and θ, but also on a balance between nonlinear attenuation at the shock front and inflow of energy into a system. Under some conditions, the average over the magnetosound period force of heating may tend to a positive or negative limit, or may tend to zero, or may remain constant when the distance from a transducer tends to infinity. Dynamics of temperature specifying heating differs in thermally stable and unstable cases and occurs unusually in the isentropically unstable flows. |
| format | Article |
| id | doaj-art-065aa57ca0ed40a6a9e133cb0f2f7cc0 |
| institution | DOAJ |
| issn | 0137-5075 2300-262X |
| language | English |
| publishDate | 2020-04-01 |
| publisher | Institute of Fundamental Technological Research Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Acoustics |
| spelling | doaj-art-065aa57ca0ed40a6a9e133cb0f2f7cc02025-08-20T03:15:52ZengInstitute of Fundamental Technological Research Polish Academy of SciencesArchives of Acoustics0137-50752300-262X2020-04-0145210.24425/aoa.2020.133145Magnetoacoustic Heating of Plasma Caused by Periodic Magnetosound Perturbations with Discontinuities in a Quasi-Isentropic Magnetic GasAnna PERELOMOVA0Technical University of GdanskThe magnetoacoustic heating of a plasma by harmonic or periodic saw-tooth perturbations at a transducer is theoretically studied. The planar fast and slow magnetosound waves are considered. The wave vector may form an arbitrary angle θ with the equilibrium straight magnetic strength. In view of variable θ and plasma-β, the description of magnetosound perturbations and relative magnetosound heating is fairly difficult. The scenario of heating depends not only on plasma-β and θ, but also on a balance between nonlinear attenuation at the shock front and inflow of energy into a system. Under some conditions, the average over the magnetosound period force of heating may tend to a positive or negative limit, or may tend to zero, or may remain constant when the distance from a transducer tends to infinity. Dynamics of temperature specifying heating differs in thermally stable and unstable cases and occurs unusually in the isentropically unstable flows.https://acoustics.ippt.pan.pl/index.php/aa/article/view/2715non-linear magnetoacousticsshock wavesadiabatical instabilityacoustic activityacoustic heating |
| spellingShingle | Anna PERELOMOVA Magnetoacoustic Heating of Plasma Caused by Periodic Magnetosound Perturbations with Discontinuities in a Quasi-Isentropic Magnetic Gas Archives of Acoustics non-linear magnetoacoustics shock waves adiabatical instability acoustic activity acoustic heating |
| title | Magnetoacoustic Heating of Plasma Caused by Periodic Magnetosound Perturbations with Discontinuities in a Quasi-Isentropic Magnetic Gas |
| title_full | Magnetoacoustic Heating of Plasma Caused by Periodic Magnetosound Perturbations with Discontinuities in a Quasi-Isentropic Magnetic Gas |
| title_fullStr | Magnetoacoustic Heating of Plasma Caused by Periodic Magnetosound Perturbations with Discontinuities in a Quasi-Isentropic Magnetic Gas |
| title_full_unstemmed | Magnetoacoustic Heating of Plasma Caused by Periodic Magnetosound Perturbations with Discontinuities in a Quasi-Isentropic Magnetic Gas |
| title_short | Magnetoacoustic Heating of Plasma Caused by Periodic Magnetosound Perturbations with Discontinuities in a Quasi-Isentropic Magnetic Gas |
| title_sort | magnetoacoustic heating of plasma caused by periodic magnetosound perturbations with discontinuities in a quasi isentropic magnetic gas |
| topic | non-linear magnetoacoustics shock waves adiabatical instability acoustic activity acoustic heating |
| url | https://acoustics.ippt.pan.pl/index.php/aa/article/view/2715 |
| work_keys_str_mv | AT annaperelomova magnetoacousticheatingofplasmacausedbyperiodicmagnetosoundperturbationswithdiscontinuitiesinaquasiisentropicmagneticgas |