Theory of shear flow effects on long‐wavelength drift wave turbulence
作者： B. A. Carreras , K. Sidikman , P. H. Diamond , P. W. Terry , L. Garcia
DOI: 10.1063/1.860420
关键词: Physics 、 Gyroradius 、 Wave turbulence 、 Normal mode 、 Mechanics 、 Turbulence 、 Shear flow 、 Thermal diffusivity 、 Condensed matter physics 、 Shear velocity 、 Diamagnetism
摘要: A simple, paradigmatic model of long‐wavelength drift wave turbulence in the presence a sheared poloidal flow is analyzed detail. Linear theory predicts that velocity shear induces strong stabilizing effect by shifting eigenmode away from k⋅B=0 resonant surface, thereby enhancing ion damping. However, multiple‐helicity numerical calculations indicate has little or no on saturated fluctuation levels. Analysis suggests this result related to incidence spiky, radially intermittent profile turbulent levels, induced low‐q mode rational surfaces, and occurs when diffusivity exceeds product diamagnetic frequency gyroradius squared. An analytical explains observed suppression magnetic damping presented.
scitation.org
aip.org
sci-hub.se 参考文章(16)
JD Meiss, W Horton, Solitary drift waves in the presence of magnetic shear Physics of Fluids. ,vol. 26, pp. 990- 997 ,(1983) , 10.1063/1.864251
F. Y. Gang, P. H. Diamond, M. N. Rosenbluth, A kinetic theory of trapped‐electron‐driven drift wave turbulence in a sheared magnetic field Physics of Fluids B: Plasma Physics. ,vol. 3, pp. 68- 86 ,(1991) , 10.1063/1.859957
A. S. Ware, P. H. Diamond, B. A. Carreras, J.‐N. Leboeuf, D. K. Lee, Theory of drift‐thermal instability‐induced turbulence Physics of Fluids B: Plasma Physics. ,vol. 4, pp. 102- 116 ,(1992) , 10.1063/1.860449
L.A Charlton, J.A Holmes, H.R Hicks, V.E Lynch, B.A Carreras, Numerical calculations using the full MHD equations in toroidal geometry Journal of Computational Physics. ,vol. 63, pp. 107- 129 ,(1986) , 10.1016/0021-9991(86)90086-0
D. Biskamp, M. Walter, Suppression of shear damping in drift wave turbulence Physics Letters A. ,vol. 109, pp. 34- 38 ,(1985) , 10.1016/0375-9601(85)90386-X
R. Taylor, M. Brown, B. Fried, H. Grote, J. Liberati, G. Morales, P. Pribyl, D. Darrow, M. Ono, H -mode behavior induced by cross-field currents in a tokamak Physical Review Letters. ,vol. 63, pp. 2365- 2368 ,(1989) , 10.1103/PHYSREVLETT.63.2365
L. D. Pearlstein, H. L. Berk, Universal Eigenmode in a Strongly Sheared Magnetic Field Physical Review Letters. ,vol. 23, pp. 220- 222 ,(1969) , 10.1103/PHYSREVLETT.23.220
B. A. Carreras, V. E. Lynch, L. Garcia, Electron diamagnetic effects on the resistive pressure‐gradient‐driven turbulence and poloidal flow generation Physics of Fluids B: Plasma Physics. ,vol. 3, pp. 1438- 1444 ,(1991) , 10.1063/1.859709
P. H. Diamond, H. Biglari, Theory of dissipative trapped-ion convective-cell turbulence Physical Review Letters. ,vol. 65, pp. 2865- 2868 ,(1990) , 10.1103/PHYSREVLETT.65.2865
R. J. Groebner, K. H. Burrell, R. P. Seraydarian, Role of edge electric field and poloidal rotation in the L-H transition. Physical Review Letters. ,vol. 64, pp. 3015- 3018 ,(1990) , 10.1103/PHYSREVLETT.64.3015