氢等离子体的经典分子动力学模拟及用于计算有效性评估的解析统计模型开发
Classical molecular dynamics simulations of hydrogen plasmas and development of an analytical statistical model for computational validity assessment
AI总结：
针对氢等离子体分子动力学模拟，开发解析统计平衡模型以评估计算有效性，验证电离-复合机制，并指导模拟在平衡后安全终止。
摘要：
对氢等离子体进行了经典分子动力学模拟，重点分析了平衡过程。详细讨论了模拟模型的理论基础以及数值相关方面——例如模拟单位的正确选择和定义，从而证明了计算机模拟技术的彻底实施。由于缺乏实验数据，分子动力学模拟通常被视为用于基准测试理论模型的“理想化计算实验”。然而，这些模拟无疑具有挑战性，因此也需要验证程序。在这项工作中，我们开发了一个解析统计平衡模型，用于等离子体粒子动力学模拟的计算有效性评估。在广泛的等离子体耦合参数范围内，模型与分子动力学结果（包括电离-复合机制的经典处理）之间取得了显著的一致性。此外，该解析模型为在达到平衡阶段后安全终止模拟运行提供了指导，这反过来又增强了从模拟物理量时间历程中可能提取的统计数据的可信度。
英文摘要：
Classical molecular dynamics simulations of hydrogen plasmas have been performed with emphasis on the analysis of equilibration process. Theoretical basis of simulation model as well as numerically relevant aspects -- such as the proper choice and definition of simulation units -- are discussed in detail, thus proving a thorough implementation of the computer simulation technique. Because of lack of experimental data, molecular dynamics simulations are often considered as "idealized computational experiments" for benchmarking of theoretical models. However, these simulations are certainly challenging and consequently a validation procedure is also demanded. In this work we develop an analytical statistical equilibrium model for computational validity assessment of plasma particle dynamics simulations. Remarkable agreement between model and molecular dynamics results including a classical treatment of ionization-recombination mechanism is obtained for a wide range of plasma coupling parameter. Furthermore, the analytical model provides guidance to securely terminate simulation runs once the equilibrium stage has been reached, which in turn gives confidence on the statistics that potentially may be extracted from time-histories of simulated physical quantities.
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