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A parallel implementation of an MHD code for the simulation of mechanically driven, turbulent dynamos in spherical geometry

机译：MHD代码的并行实现，用于模拟球形几何中的机械驱动湍流发电机

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A parallel implementation of a nonlinear pseudo-spectral MHD code for the simulation of turbulent dynamos in spherical geometry is reported. It employs a dual domain decomposition technique in both real and spectral space. It is shown that this method shows nearly ideal scaling going up to 128 CPUs on Beowulf-type clusters with fast interconnect. Furthermore, the potential of exploiting single precision arithmetic on standard x86 processors is examined. It is pointed out that the MHD code thereby achieves a maximum speedup of 1.7, whereas the validity of the computations is still granted. The combination of both measures will allow for the direct numerical simulation of highly turbulent cases (1500 < Re < 5000), which have been previously impractical, given today's computational speed. (C) 2008 Elsevier B.V. All rights reserved.
机译：报道了用于模拟球形几何中的湍流动力学的非线性伪谱MHD代码的并行实现。它在实空间和频谱空间中均采用了双域分解技术。结果表明，该方法在具有快速互连的Beowulf类型的群集上最多可扩展到128个CPU，显示了近乎理想的扩展。此外，研究了在标准x86处理器上利用单精度算术的潜力。要指出的是，MHD代码由此实现了最大加速比1.7，而计算的有效性仍然被认可。鉴于今天的计算速度，两种方法的结合将允许对高度湍流的情况（1500

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