【摘要】 对离子温度梯度模湍流非线性流体方程进行了解耦处理,得到包含磁场剪切效应的带状流与漂移波相互作用的非线性动力学方程.采用调制不稳定性的四波相互作用模型,研究了磁场剪切对带状流产生的影响.研究表明,在k∥值较小的范围内,当|k∥|增加时,带状流的增长率也呈增加的趋势.更多还原

【Abstract】 By decoupling the nonlinear fluid equations of ion-temperature-gradient (ITG) mode,the zonal flow-drift wave nonlinear dynamical equation including magnetic shear is derived.The role of magnetic shear for zonal flow generation by ITG mode turbulence is studied using a four-wave interaction model of modulational instability.Finally we can draw the conclusion that within a smaller range of k∥,as |k∥|increases,the growth rate of zonal flow is also increased.更多还原