Alfvén‐Fast Wave Coupling in a 2D Nonuniform Medium
Abstract A 2D Cartesian simulation is presented and used to solve the ideal, low‐beta, linear magnetohydrodynamics equations. A simulation is used to investigate the propagation of Alfvén waves through inhomogeneities in Alfvén speed and density. In particular, the loss of Alfvén wave energy through...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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American Geophysical Union (AGU)
2023-10-01
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| Series: | Earth and Space Science |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2023EA003167 |
| _version_ | 1797648033557512192 |
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| author | R. Davies A. N. Wright |
| author_facet | R. Davies A. N. Wright |
| author_sort | R. Davies |
| collection | DOAJ |
| description | Abstract A 2D Cartesian simulation is presented and used to solve the ideal, low‐beta, linear magnetohydrodynamics equations. A simulation is used to investigate the propagation of Alfvén waves through inhomogeneities in Alfvén speed and density. In particular, the loss of Alfvén wave energy through coupling to the fast wave, and also the form of the Alfvén wave as it emerges from the inhomogeneous region is studied. Potential applications of this include the magnetospheres of both Jupiter and the Earth. The results show that Alfvén waves can be significantly distorted by a nonuniformity and still propagate through the region efficiently, with relatively small amounts of Alfvén wave energy lost through mode conversion and reflection. |
| first_indexed | 2024-03-11T15:26:14Z |
| format | Article |
| id | doaj.art-7efd6a088dd74dca9f9af6e0693db3c7 |
| institution | Directory Open Access Journal |
| issn | 2333-5084 |
| language | English |
| last_indexed | 2024-03-11T15:26:14Z |
| publishDate | 2023-10-01 |
| publisher | American Geophysical Union (AGU) |
| record_format | Article |
| series | Earth and Space Science |
| spelling | doaj.art-7efd6a088dd74dca9f9af6e0693db3c72023-10-27T17:48:33ZengAmerican Geophysical Union (AGU)Earth and Space Science2333-50842023-10-011010n/an/a10.1029/2023EA003167Alfvén‐Fast Wave Coupling in a 2D Nonuniform MediumR. Davies0A. N. Wright1School of Mathematics and Statistics University of St Andrews St Andrews UKSchool of Mathematics and Statistics University of St Andrews St Andrews UKAbstract A 2D Cartesian simulation is presented and used to solve the ideal, low‐beta, linear magnetohydrodynamics equations. A simulation is used to investigate the propagation of Alfvén waves through inhomogeneities in Alfvén speed and density. In particular, the loss of Alfvén wave energy through coupling to the fast wave, and also the form of the Alfvén wave as it emerges from the inhomogeneous region is studied. Potential applications of this include the magnetospheres of both Jupiter and the Earth. The results show that Alfvén waves can be significantly distorted by a nonuniformity and still propagate through the region efficiently, with relatively small amounts of Alfvén wave energy lost through mode conversion and reflection.https://doi.org/10.1029/2023EA003167magnetohydrodynamicswave mode couplingAlfven wavesmagnetospheric physics |
| spellingShingle | R. Davies A. N. Wright Alfvén‐Fast Wave Coupling in a 2D Nonuniform Medium Earth and Space Science magnetohydrodynamics wave mode coupling Alfven waves magnetospheric physics |
| title | Alfvén‐Fast Wave Coupling in a 2D Nonuniform Medium |
| title_full | Alfvén‐Fast Wave Coupling in a 2D Nonuniform Medium |
| title_fullStr | Alfvén‐Fast Wave Coupling in a 2D Nonuniform Medium |
| title_full_unstemmed | Alfvén‐Fast Wave Coupling in a 2D Nonuniform Medium |
| title_short | Alfvén‐Fast Wave Coupling in a 2D Nonuniform Medium |
| title_sort | alfven fast wave coupling in a 2d nonuniform medium |
| topic | magnetohydrodynamics wave mode coupling Alfven waves magnetospheric physics |
| url | https://doi.org/10.1029/2023EA003167 |
| work_keys_str_mv | AT rdavies alfvenfastwavecouplingina2dnonuniformmedium AT anwright alfvenfastwavecouplingina2dnonuniformmedium |