FESTIM (Finite Element Simulation of Tritium In Materials), is a versatile open-source finite element code developed in Python for simulating hydrogen transport in materials. FESTIM addresses limitations observed in existing codes by enabling multi-dimensional, multi-material simulations, leveraging the flexible finite element method and the open-source FEniCS library. Use cases illustrating FESTIM’s applicability and efficacy are presented: reproduction of thermo-desorption experiments, modelling plasma-facing components (divertor monoblocks), and modelling breeding blankets. A comparative analysis with two other numerical tools (TMAP8 and COMSOL®) is then performed. FESTIM is in very good agreement with these codes and shows similar (or better) computing performances. Finally, the thorough validation and verification (using the method of manufactured solutions) of the code is described, highlighting the code’s reliability.

中文翻译：

---

FESTIM：氢传输模拟的开源代码

FESTIM（材料中氚的有限元模拟）是用 Python 开发的多功能开源有限元代码，用于模拟材料中的氢传输。 FESTIM 通过启用多维、多材料模拟，利用灵活的有限元方法和开源 FEniCS 库，解决了现有代码中观察到的局限性。展示了说明 FESTIM 的适用性和功效的用例：热解吸实验的再现、面向等离子体的组件（偏滤器整体）建模以及繁殖毯建模。然后与其他两种数值工具（TMAP8 和 COMSOL®）进行比较分析。 FESTIM 与这些代码非常吻合，并显示出类似（或更好）的计算性能。最后，描述了代码的彻底验证和验证（使用制造解决方案的方法），突出了代码的可靠性。