Dynamic structure in self-sustained turbulence
作者： K Itoh , S-I Itoh , M Yagi , A Fukuyama
DOI: 10.1088/0741-3335/38/12/004
关键词: Toroid 、 Turbulence 、 K-epsilon turbulence model 、 Mechanics 、 K-omega turbulence model 、 Physics 、 Pressure gradient 、 Transport coefficient 、 Curvature 、 Electric field 、 Statistical physics
摘要: A dynamical equation for self-sustained and pressure-driven turbulence in toroidal plasmas is derived. The growth rate of the dressed-test mode, which belongs to subcritical turbulence, obtained as a function turbulent transport coefficient. In limit low fluctuation level, mode has nonlinear instability shows explosive growth. vanishes when driven reaches stationary-turbulent level. stationary solution thermodynamically stable. characteristic time, by are established, scales with ion-sound transit time accelerated bad magnetic curvature. influence pressure gradient well radial electric field inhomogeneity quantified.
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