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Dynamics of zonal flows: failure of wave-kinetic theory, and new geometrical optics approximations
| Content Provider | Scilit |
|---|---|
| Author | Parker, Jeffrey B. |
| Copyright Year | 2016 |
| Description | The self-organisation of turbulence into regular zonal flows can be fruitfully investigated with quasi-linear methods and statistical descriptions. A wave-kinetic equation that assumes asymptotically large-scale zonal flows leads to ultraviolet divergence. From an exact description of quasi-linear dynamics emerges two better geometrical optics approximations. These involve not only the mean flow shear but also the second and third derivative of the mean flow. One approximation takes the form of a new wave-kinetic equation, but is only valid when the zonal flow is quasi-static and wave action is conserved. |
| Related Links | https://www.cambridge.org/core/services/aop-cambridge-core/content/view/5B51BB7D026E19E8F21801568ED6EA75/S0022377816001021a.pdf/div-class-title-dynamics-of-zonal-flows-failure-of-wave-kinetic-theory-and-new-geometrical-optics-approximations-div.pdf |
| ISSN | 00223778 |
| e-ISSN | 14697807 |
| DOI | 10.1017/s0022377816001021 |
| Journal | Journal of Plasma Physics |
| Issue Number | 6 |
| Volume Number | 82 |
| Language | English |
| Publisher | Cambridge University Press (CUP) |
| Publisher Date | 2016-12-01 |
| Access Restriction | Open |
| Subject Keyword | Journal of Plasma Physics Fluids and Plasmas Physics Plasma Instabilities Plasma Nonlinear Phenomena Plasma Waves |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics |
