A Numerical Study on the Validity of the Local Equilibrium Hypothesis in Modeling Hydrogen Thermal Desorption Spectra

作者：Ebihara Ken ichi^*; Kaburaki Hideo; Suzudo Tomoaki; Takai Kenichi

来源：ISIJ International, 2009, 49(12): 1907-1913.

DOI：10.2355/isijinternational.49.1907

• thermal desorption analysis
• hydrogen state
• local equilibrium
• hydrogen diffusion
• numerical simulation

We present a systematic benchmark study on different numerical models for analyzing hydrogen thermal desorption spectra, by focusing on the adoption of the local equilibrium hypothesis in these models. We find that the direct numerical method of the full set of the extended mass conservation equations is only able to predict the experimental behavior of thermal desorption spectra for pure iron in the thin specimen limit, while other models incorporating the local equilibrium hypothesis fail to predict this behavior.

• 出版日期2009