Wave kinetic equation for inhomogeneous drift-wave turbulence beyond the quasilinear approximation
 作者： D. E. Ruiz,  M. E. Glinsky,  I. Y. Dodin 作者单位： 11 Sandia National Laboratories , P.O. Box 5800 , Albuquerque , New Mexico 87185 , USA 2 2 Princeton Plasma Physics Laboratory , Princeton , New Jersey 08543 , USA 3 3 Department of Astrophysical Sciences , Princeton University , Princeton , New Jersey 08544 , USA 刊名： Journal of Plasma Physics, 2019, Vol.85 (1) 来源数据库： Cambridge University Press Journal DOI： 10.1017/S0022377818001307 原始语种摘要： The formation of zonal flows from inhomogeneous drift-wave (DW) turbulence is often described using statistical theories derived within the quasilinear approximation. However, this approximation neglects wave–wave collisions. Hence, some important effects such as the Batchelor–Kraichnan inverse-energy cascade are not captured within this approach. Here we derive a wave kinetic equation that includes a DW collision operator in the presence of zonal flows. Our derivation makes use of the Weyl calculus, the quasinormal statistical closure and the geometrical-optics approximation. The obtained model conserves both the total enstrophy and energy of the system. The derived DW collision operator breaks down at the Rayleigh–Kuo threshold. This threshold is missed by homogeneous-turbulence theory... but expected from a full-wave quasilinear analysis. In the future, this theory might help better understand the interactions between drift waves and zonal flows, including the validity domain of the quasilinear approximation that is commonly used in the literature.

• approximation　近似
• drift　水平巷道
• turbulence　湍流紊流
• inhomogeneous　不均质的
• quasilinear　准线性的
• threshold　阈值
• understand　理解
• kinetic　动的
• missed　未达到的
• beyond　在...那边