DISCO: A 3D MOVING-MESH MAGNETOHYDRODYNAMICS CODE DESIGNED FOR THE STUDY OF ASTROPHYSICAL DISKS
DISCO: A 3D MOVING-MESH MAGNETOHYDRODYNAMICS CODE DESIGNED FOR THE STUDY OF ASTROPHYSICAL DISKS
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DISCO：专为研究天体物理盘而设计的 3D 移动网格磁流体动力学代码
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
P. Duffell
中科院分区：
文献类型：
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作者：
P. Duffell
这项工作提出了公开可用的移动网格磁流体动力学 (MHD) 代码 DISCO。 DISCO 在二维和三维轨道流体运动演化方面高效且准确，尤其是在高马赫数时。 DISCO 采用移动网格方法，利用动态圆柱网格，可以进行方位剪切以跟随气体的轨道运动。移动网格消除了扩散平流误差，并允许比静态网格更长的时间步长。 MHD 在 DISCO 中使用 HLLD 黎曼求解器和与网格运动兼容的新颖约束传输 (CT) 方案来实现。 DISCO 针对各种问题进行了测试，旨在测试其稳定性、准确性和可扩展性。此外，还进行了多项 MHD 测试，证明了新 CT 方法的准确性和稳定性，其中包括两项磁旋转不稳定性测试，一项测试线性增长率，另一项测试不稳定进入完全湍流状态。
This work presents the publicly available moving-mesh magnetohydrodynamics (MHD) code DISCO. DISCO is efficient and accurate at evolving orbital fluid motion in two and three dimensions, especially at high Mach numbers. DISCO employs a moving-mesh approach utilizing a dynamic cylindrical mesh that can shear azimuthally to follow the orbital motion of the gas. The moving mesh removes diffusive advection errors and allows for longer time-steps than a static grid. MHD is implemented in DISCO using an HLLD Riemann solver and a novel constrained transport (CT) scheme that is compatible with the mesh motion. DISCO is tested against a wide variety of problems, which are designed to test its stability, accuracy, and scalability. In addition, several MHD tests are performed which demonstrate the accuracy and stability of the new CT approach, including two tests of the magneto-rotational instability, one testing the linear growth rate and the other following the instability into the fully turbulent regime.
DOI：
10.1146/annurev-astro-081811-125523
发表时间：
2012-03
影响因子：
33.3
作者：
W. Kley;R. Nelson
通讯作者：
W. Kley;R. Nelson