Solitary zonal structures in subcritical drift waves: a minimum model

Zhou, Yao ; Zhu, Hongxuan ; Dodin, I. Y.
Issue date: 2020
Rights:
Creative Commons Attribution 4.0 International (CC BY)
Cite as:
Zhou, Yao, Zhu, Hongxuan, & Dodin, I. Y. Solitary zonal structures in subcritical drift waves: a minimum model [Data set]. Princeton Plasma Physics Laboratory, Princeton University. https://doi.org/10.11578/1608313
@electronic{zhou_yao_unknown,
  author      = {Zhou, Yao and
                Zhu, Hongxuan and
                Dodin, I. Y.},
  title       = {{Solitary zonal structures in subcritical
                 drift waves: a minimum model}},
  publisher   = {{Princeton Plasma Physics Laboratory, Pri
                nceton University}},
  url         = {https://doi.org/10.11578/1608313}
}
Description:

Solitary zonal structures have recently been identified in gyrokinetic simulations of subcritical drift-wave (DW) turbulence with background shear flows. However, the nature of these structures has not been fully understood yet. Here, we show that similar structures can be obtained within a reduced model, which complements the modified Hasegawa–Mima equation with a generic primary instability and a background shear flow. We also find that these structures can be qualitatively reproduced in the modified Hasegawa–Wakatani equation, which subsumes the reduced model as a limit. In particular, we illustrate that in both cases, the solitary zonal structures approximately satisfy the same 'equation of state', which is a local relation connecting the DW envelope with the zonal-flow velocity. Due to this generality, our reduced model can be considered as a minimum model for solitary zonal structures in subcritical DWs.

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1 README.txt 1.14 KB
2 ARK_DATA.zip 9.48 MB