Simulation benchmarks for low-pressure plasmas: Capacitive discharges
Simulation benchmarks for low-pressure plasmas: Capacitive discharges
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DOI：
10.1063/1.4775084
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发表时间：
2012-11
影响因子：
2.2
通讯作者：
M. Turner;A. Derzsi;Z. Donkó;D. Eremin;S. Kelly;T. Lafleur;T. Mussenbrock
中科院分区：
文献类型：
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作者：
M. Turner;A. Derzsi;Z. Donkó;D. Eremin;S. Kelly;T. Lafleur;T. Mussenbrock
基准测试通常被认为是证明计算机模拟正确性的一个重要因素。在现代意义上，基准是计算机模拟的结果，具有正确性的证据，伴随着相关误差的估计，因此可以用作判断其他代码的准确性和效率的基础。在本文中，我们提出了四个基准的情况下，电容耦合放电。这些基准规定了所有相关的物理和数值参数。我们已经模拟了基准条件下使用五个独立开发的粒子在细胞的代码。我们表明，这些模拟的结果是统计上难以区分的，我们定义的不确定性范围内。因此，我们声称，这些模拟的结果代表了强有力的基准，它可以被用来作为评估其他代码的准确性的基础。这些其他代码可以包括粒子模拟之外的其他方法，其中基准测试不仅可以检查实现的准确性和效率，还可以检查不同物理模型的保真度，例如矩模型或混合模型。我们在附录中讨论了一个这样的例子。当然，我们开发的方法也可以很容易地扩展到一套基准测试，覆盖更广泛的物理和化学现象。
Benchmarking is generally accepted as an important element in demonstrating the correctness of computer simulations. In the modern sense, a benchmark is a computer simulation result that has evidence of correctness, is accompanied by estimates of relevant errors, and which can thus be used as a basis for judging the accuracy and efficiency of other codes. In this paper, we present four benchmark cases related to capacitively coupled discharges. These benchmarks prescribe all relevant physical and numerical parameters. We have simulated the benchmark conditions using five independently developed particle-in-cell codes. We show that the results of these simulations are statistically indistinguishable, within bounds of uncertainty that we define. We, therefore, claim that the results of these simulations represent strong benchmarks, which can be used as a basis for evaluating the accuracy of other codes. These other codes could include other approaches than particle-in-cell simulations, where benchmarking could examine not just implementation accuracy and efficiency, but also the fidelity of different physical models, such as moment or hybrid models. We discuss an example of this kind in the Appendix. Of course, the methodology that we have developed can also be readily extended to a suite of benchmarks with coverage of a wider range of physical and chemical phenomena.