Merging of zonal flows in gyrofluid resistive drift-wave turbulence
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arXiv
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| Hauptverfasser: | , , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2026
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| _version_ | 1866918358141632512 |
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| author | Grander, Fabian Gröfler, Tobias Locker, Franz Ferdinand Rinner, Manuel Kendl, Alexander |
| author_facet | Grander, Fabian Gröfler, Tobias Locker, Franz Ferdinand Rinner, Manuel Kendl, Alexander |
| contents | Non-linear dynamics of zonal flows is investigated in the context of the gyrofluid modified Hasegawa-Wakatani model. Merging of zonal flows and the chaotic developement of the initial zonal flow pattern is explored. Conservation equations for zonal flow momentum and energy with consistent finite Larmor radius (FLR) effects are derived and used for a quantitative analysis of zonal flow mergers in numerical simulations. The nonlinear local Reynolds stress transfer as opposed to (hyper)viscous dissipation is found to be the main cause of merging. The applicability of the concept of a phase transition in the strict thermodynamical sense is discussed in context of zonal flow transition hysteresis. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_23007 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Merging of zonal flows in gyrofluid resistive drift-wave turbulence Grander, Fabian Gröfler, Tobias Locker, Franz Ferdinand Rinner, Manuel Kendl, Alexander Plasma Physics Non-linear dynamics of zonal flows is investigated in the context of the gyrofluid modified Hasegawa-Wakatani model. Merging of zonal flows and the chaotic developement of the initial zonal flow pattern is explored. Conservation equations for zonal flow momentum and energy with consistent finite Larmor radius (FLR) effects are derived and used for a quantitative analysis of zonal flow mergers in numerical simulations. The nonlinear local Reynolds stress transfer as opposed to (hyper)viscous dissipation is found to be the main cause of merging. The applicability of the concept of a phase transition in the strict thermodynamical sense is discussed in context of zonal flow transition hysteresis. |
| title | Merging of zonal flows in gyrofluid resistive drift-wave turbulence |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2602.23007 |