With state‐of‐the‐art plasma edge codes, which consist of coupled finite‐volume (FV) Monte Carlo (MC) codes, it is challenging to obtain accurate results for time‐dependent simulations in a feasible computational time. For steady‐state simulations, it has been recently demonstrated that the speed and accuracy can be drastically improved by choosing more suitable numerical parameters and including post‐processing averaging. This article extends the methodology for accuracy assessment to time‐dependent simulations. For a simplified one‐dimensional (1D) plasma edge model, we compare the numerical accuracy of solutions obtained with an implicit approach, where the code system is fully solved in each time step, to those with a mixed implicit/explicit approach, where only the FV code is converged in each time step. We demonstrate the importance of choosing the numerical parameters adequately in both approaches.

中文翻译：

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耦合有限体积蒙特卡洛码的准确性和收敛性，用于随时间变化的等离子体边缘模拟

使用由耦合的有限体积（FV）蒙特卡洛（MC）码组成的最新等离子边缘代码，在可行的计算时间内获得准确的时间相关模拟结果具有挑战性。对于稳态仿真，最近已证明，通过选择更合适的数值参数并包括后处理平均值，可以大大提高速度和精度。本文将准确性评估的方法扩展到了与时间有关的仿真。对于简化的一维（1D）等离子体边缘模型，我们比较了使用隐式方法（在每个时间步中完全解决了代码系统）获得的解决方案的数值精度，以及使用混合的隐式/显式方法（仅在其中求解）的精度。 FV代码在每个时间步收敛。