Multi-dimensional gyrokinetic parameter studies based on eigenvalue computations

Multi-dimensional gyrokinetic parameter studies based on eigenvalue computations
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基于特征值计算的多维回旋参数研究

DOI:
10.1016/j.cpc.2011.12.018
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发表时间:
2012
期刊:
Comput. Phys. Commun.
影响因子:
--
通讯作者:
F. Jenko
F. Jenko
中科院分区:
--
文献类型:
--
作者:
F. Merz;C. Kowitz;E. Romero;J. Román;F. Jenko

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等离子体微不稳定性,这可以描述在框架内的线性gyrokinetic方程,常规计算的稳定性分析和磁约束聚变实验的运输预测的背景下。GENE代码,它解决了gyrokinetic方程,已被耦合到SLEPc包的一个有效的迭代,矩阵自由,和并行计算的最右边的特征值。这种设置,包括预条件,这是必要的新实施的雅可比-戴维森求解器。在一个单一的参数集的不稳定性的快速计算被利用,使参数扫描可行,即计算在参数空间中的许多点的解决方案。讨论了与参数扫描相关的几个问题,如参数集的高效并行化和子空间回收。
Plasma microinstabilities, which can be described in the framework of the linear gyrokinetic equations, are routinely computed in the context of stability analyses and transport predictions for magnetic confinement fusion experiments. The GENE code, which solves the gyrokinetic equations, has been coupled to the SLEPc package for an efficient iterative, matrix-free, and parallel computation of rightmost eigenvalues. This setup is presented, including the preconditioner which is necessary for the newly implemented Jacobi–Davidson solver. The fast computation of instabilities at a single parameter set is exploited to make parameter scans viable, that is to compute the solution at many points in the parameter space. Several issues related to parameter scans are discussed, such as an efficient parallelization over parameter sets and subspace recycling.
DOI: 10.1137/1.9780898718003
发表时间: 2003-05
期刊: --
影响因子: --
作者:
Y. Saad
通讯作者: Y. Saad