Transport Properties of the Azimuthal Magnetorotational Instability
Transport Properties of the Azimuthal Magnetorotational Instability
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DOI：
10.3847/1538-4357/aa917d
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发表时间：
2017-11-10
影响因子：
4.9
通讯作者：
Avila, Marc
中科院分区：
文献类型：
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作者：
Guseva, Anna;Willis, Ashley P.;Avila, Marc
磁旋转不稳定性(MRI)被认为是开普勒吸积盘中湍流的一个重要来源。受最近的实验室实验的启发，我们研究了在两个同心旋转的圆柱体之间剪切的导电流体中的方位磁场驱动的磁共振成像。通过调整圆柱体的自转速度，我们可以近似得到与r(Q)成正比的角速度分布。我们对瑞利线Q&>=-2附近的陡峭剖面和接近-3/2的准开普勒型剖面进行了直接的数值模拟，并覆盖了很大范围的雷诺(Re
The magnetorotational instability (MRI) is thought to be a powerful source of turbulence in Keplerian accretion disks. Motivated by recent laboratory experiments, we study the MRI driven by an azimuthal magnetic field in an electrically conducting fluid sheared between two concentric rotating cylinders. By adjusting the rotation rates of the cylinders, we approximate angular velocity profiles w proportional to r(q). We perform direct numerical simulations of a steep profile close to the Rayleigh line q >= -2 and a quasi-Keplerian profile q approximate to -3/2 and cover wide ranges of Reynolds (Re