The generations of zonal flow (ZF) and density (ZD) and their feedback on the resistive drift wave turbulent transport are investigated within the modified Hasegawa-Wakatani model. With proper normalization, the system is only controlled by an effective adiabatic parameter, α, where the ZF dominates the collisional drift wave (DW) turbulence in the adiabatic limit $\alpha >1$. By conducting direct numerical simulations, we found that the ZF can significantly reduce the transport by trapping the DWs in the vicinities of its extrema for $\alpha >1$, whereas the ZD itself has little impact on the turbulence but can only assist ZF to further decrease the transport by flattening the local plasma density gradient.

中文翻译：

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地层流量和密度对电阻性漂移波湍流输运的影响

在改良的Hasegawa-Wakatani模型中研究了纬向流（ZF）和密度（ZD）的产生及其对电阻性漂移波湍流输运的反馈。通过适当的归一化，系统仅由有效的绝热参数α来控制，其中ZF在绝热极限中主导碰撞漂移波（DW）湍流$\alpha >\mathrm{1个}$。通过进行直接数值模拟，我们发现ZF可以通过将DW困在其极值附近来显着减少运输。$\alpha >\mathrm{1个}$，而ZD本身对湍流的影响很小，但只能通过平坦化局部血浆密度梯度来帮助ZF进一步降低传输。