Non-perturbative statistical theory of intermittency in ITG drift wave turbulence with zonal flows
arXiv:0901.1996 · doi:10.1088/0029-5515/49/7/075027
Abstract
The probability distribution functions (PDFs) of momentum flux and zonal flow formation in ion-temperature-gradient (ITG) turbulence are investigated, including the effect of the shear flow on the PDFs. While ITG turbulence maintains high level of transport, this may be suppressed by shear flow. Zonal flows are also shown here to have an enhanced likelihood of generation further from marginal stability which will then regulate the ITG turbulence, which is more prominent with increased shear flow, leading to a self-regulating system.
29 pages, 3 figures
References in corpus (7)
- Instantons in Burgers Equation
- Zonal flow generation in ion temperature gradient mode turbulence
- Non-perturbative models of intermittency in edge turbulence
- The momentum flux probability distribution function for ion-temperature-gradient turbulence
- Analytical theory of the probability distribution function of structure formation
- Mean sheared flow and parallel ion motion effects on zonal flow generation in ion-temperature-gradient mode turbulence
- Effects of parallel ion motion on zonal flow generation in ion-temperature-gradient mode turbulence