Magnetohydrodynamic Simulation of Forced Magnetic Reconnection
Magnetic reconnection is a fundamental process in laboratory, astrophysical, and space plasmas, which is a mechanism for converting magnetic energy into the thermal and kinetic energy of plasma and the efficient acceleration of charged particles. Using two-dimensional magnetohydrodynamic simulations...
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Damghan university
2023-12-01
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| Series: | Iranian Journal of Astronomy and Astrophysics |
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| Online Access: | https://ijaa.du.ac.ir/article_377_8994ab024f2e52e5d1a3b2ee503dbb7c.pdf |
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| author | Masom Sarkhosh Mahboub Hosseinpour Mohammad Ali Mohammadi |
| author_facet | Masom Sarkhosh Mahboub Hosseinpour Mohammad Ali Mohammadi |
| author_sort | Masom Sarkhosh |
| collection | DOAJ |
| description | Magnetic reconnection is a fundamental process in laboratory, astrophysical, and space plasmas, which is a mechanism for converting magnetic energy into the thermal and kinetic energy of plasma and the efficient acceleration of charged particles. Using two-dimensional magnetohydrodynamic simulations, we investigate the onset and the growth of instability associated with the forced magnetic reconnection phenomenon in the well-known equilibrium structure of the Harris current sheet in the presence of a resistive plasma. To derive externally the magnetic reconnection process, we perturb the velocity of plasma close to the up and down boundaries in the form of two localized pulses. The results show that these pulses propagate towards the current sheet, where the magnetic field changes direction, generates a perturbed magnetic field consequently, and triggers the magnetic reconnection phenomenon in an X-point in the center of the current sheet. We realized that increasing the amplitude of pulses results in a faster reconnection, and symmetric pulses are more efficient in conducting the reconnection. Furthermore, by imposing a transient (time-dependent) MHD wave normal to the current sheet, we found that an MHD wave with a more significant period (lower frequency) considerably affects the current sheet's topology and excites a faster reconnection. A similar conclusion was also obtained for an MHD wave with a larger wavelength (lower wavenumber). The obtained results are of interest for understanding the interaction of an MHD wave with an equilibrium current sheet in confined fusion plasmas and solar corona plasmas. |
| format | Article |
| id | doaj-art-b7ddfb2a9bce453da8807cc61ea06998 |
| institution | Kabale University |
| issn | 2322-4924 2383-403X |
| language | English |
| publishDate | 2023-12-01 |
| publisher | Damghan university |
| record_format | Article |
| series | Iranian Journal of Astronomy and Astrophysics |
| spelling | doaj-art-b7ddfb2a9bce453da8807cc61ea069982025-01-12T10:04:10ZengDamghan universityIranian Journal of Astronomy and Astrophysics2322-49242383-403X2023-12-0110328730110.22128/ijaa.2023.732.1168377Magnetohydrodynamic Simulation of Forced Magnetic ReconnectionMasom Sarkhosh0Mahboub Hosseinpour1Mohammad Ali Mohammadi2Faculty of Physics, University of Tabriz, TabrizFaculty of Physics, University of Tabriz, TabrizFaculty of Physics, University of Tabriz, Tabriz,Magnetic reconnection is a fundamental process in laboratory, astrophysical, and space plasmas, which is a mechanism for converting magnetic energy into the thermal and kinetic energy of plasma and the efficient acceleration of charged particles. Using two-dimensional magnetohydrodynamic simulations, we investigate the onset and the growth of instability associated with the forced magnetic reconnection phenomenon in the well-known equilibrium structure of the Harris current sheet in the presence of a resistive plasma. To derive externally the magnetic reconnection process, we perturb the velocity of plasma close to the up and down boundaries in the form of two localized pulses. The results show that these pulses propagate towards the current sheet, where the magnetic field changes direction, generates a perturbed magnetic field consequently, and triggers the magnetic reconnection phenomenon in an X-point in the center of the current sheet. We realized that increasing the amplitude of pulses results in a faster reconnection, and symmetric pulses are more efficient in conducting the reconnection. Furthermore, by imposing a transient (time-dependent) MHD wave normal to the current sheet, we found that an MHD wave with a more significant period (lower frequency) considerably affects the current sheet's topology and excites a faster reconnection. A similar conclusion was also obtained for an MHD wave with a larger wavelength (lower wavenumber). The obtained results are of interest for understanding the interaction of an MHD wave with an equilibrium current sheet in confined fusion plasmas and solar corona plasmas.https://ijaa.du.ac.ir/article_377_8994ab024f2e52e5d1a3b2ee503dbb7c.pdfsolar plasmaforced magnetic reconnectionmagnetohydrodynamic simulationcurrent sheet |
| spellingShingle | Masom Sarkhosh Mahboub Hosseinpour Mohammad Ali Mohammadi Magnetohydrodynamic Simulation of Forced Magnetic Reconnection Iranian Journal of Astronomy and Astrophysics solar plasma forced magnetic reconnection magnetohydrodynamic simulation current sheet |
| title | Magnetohydrodynamic Simulation of Forced Magnetic Reconnection |
| title_full | Magnetohydrodynamic Simulation of Forced Magnetic Reconnection |
| title_fullStr | Magnetohydrodynamic Simulation of Forced Magnetic Reconnection |
| title_full_unstemmed | Magnetohydrodynamic Simulation of Forced Magnetic Reconnection |
| title_short | Magnetohydrodynamic Simulation of Forced Magnetic Reconnection |
| title_sort | magnetohydrodynamic simulation of forced magnetic reconnection |
| topic | solar plasma forced magnetic reconnection magnetohydrodynamic simulation current sheet |
| url | https://ijaa.du.ac.ir/article_377_8994ab024f2e52e5d1a3b2ee503dbb7c.pdf |
| work_keys_str_mv | AT masomsarkhosh magnetohydrodynamicsimulationofforcedmagneticreconnection AT mahboubhosseinpour magnetohydrodynamicsimulationofforcedmagneticreconnection AT mohammadalimohammadi magnetohydrodynamicsimulationofforcedmagneticreconnection |