Numerical Analysis of Nonlinear Collisional Drift Instability
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概要
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Nonlinear evolution of co]]isionaJ drift wave instability is studied numerically.The model equations of quasilinear type are used which describe the modificationof background density and the amplitude of unstable drift wave. Their solutionsare classified according to the value of a parameter t7 which is proportional to theratio of ion viscous damping to linear growth rate y.. In the vicinity of marginal,stability the unstable drift waves are shown to be saturated by flattening of thebackground density. As t7 decreases further we first obtain periodic and latteraperiodic solutions. The wave associated diffusion coefficient is obtained numeri-cally as a function of t7 and found to be much less than the usual estimate y./kf.
- 1978-09-15
著者
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Nishi-kawa Ken-ichi
Institute Of Plasma Physics Nagoya University
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TERASHIMA Yoshinosuke
Institute of Plasma Physics,Nagoya University
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Hatori Tadatsugu
Institute Of Plasma Physics Nagoya University
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Terashima Yoshinosuke
Institute Of Plasma Physics Nagoya University
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Terashima Yoshinosuke
Institute Of Plasma Physics Nagoya Univ.
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