Anomalous momentum transport from drift wave turbulence
Anomalous momentum transport from drift wave turbulence
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DOI：
10.1063/1.860610
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发表时间：
1993-11
期刊：
影响因子：
--
通讯作者：
R. Dominguez;G. Staebler
中科院分区：
文献类型：
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作者：
R. Dominguez;G. Staebler
采用剪切板状磁场模型B=B0[x/Ls]，并采用非均匀流动的方式，对离子温度梯度（ITG）和耗散捕获电子（DTE）模式进行了动力学稳定性分析。计算了耦合到局部垂直（y分量）和平行（z分量）动量输运的伴随拟线性应力分量，得到了垂直和平行反常粘性应力。通常在剪切垂直流的中等值处观察到ITG诱导的粘性应力击穿。即使在没有外部动量源的情况下，离子抗磁效应也会产生不均匀的径向电场，从而产生剪切垂直流，从而维持剪切平行流。在动量平衡方程中，垂直应力分量的影响一般较小，而平行应力分量主要由垂直流量sh决定。
A sheared slab magnetic field model B=B0[ẑ+(x/Ls)ŷ], with inhomogeneous flows in the ŷ and ẑ directions, is used to perform a fully kinetic stability analysis of the ion temperature gradient (ITG) and dissipative trapped electron (DTE) modes. The concomitant quasilinear stress components that couple to the local perpendicular (y component) and parallel (z component) momentum transport are also calculated and the anomalous perpendicular and parallel viscous stresses obtained. A breakdown of the ITG‐induced viscous stresses are generally observed at moderate values of the sheared perpendicular flow. Even in the absence of external momentum sources, ion diamagnetic effects can generate an inhomogeneous radial electric field which gives rise to a sheared perpendicular flow which can sustain a sheared parallel flow. The effect of the perpendicular stress component in the momentum balance equations is generally small while the parallel stress component, which is primarily determined by the perpendicular flow sh...