通过COMSOL Multi‐physics 5．0的达西定律模块、对流扩散PDE方程和多孔介质热传递模块建立了储氢合金氢气释放反应中描述多物理场强耦合作用的一维模型和二维模型，并对比了2种建模方式的收敛性和求解效率．模型通过瞬态求解器仿真了固态／气态氢气浓度、压强、温度、流场等参数在不同时刻的分布曲线并根据对称性原理生成了二维和三维云图用于直观分析．结果表明，在给定模型参数下储氢罐中物理状态的空间波动性远远小于时间波动性，因此可以使用收敛性和求解效率相对较高的一维模型分析储氢合金的释放效率和存储安全等问题．%Study of hydrogen releasing efficiency is an important part of hydrogen cell development .A serials of nonlinear partial differential equations are simplified to model the mass balance ,momentum balance and energy balance principles engaged in hydrogen releasing action process .2D‐symetric and 1D models are built to describe variable nonlinear coupling during the reaction based on Darcy ’s Law , Mass Convection and Diffusion and Heat Transfer in Porous Media modules in COMSOL Multi‐phys‐ics 5 .0 .Comparison of convergence and solving efficiency between 2D‐symetric and 1D models are made .T he models analyze the solid hydrogen density ,gas hydrogen density ,Darcy pressure ,Darcy velocity and temperature as function of time and their dimensional distribution .Results show s that such variable’s dimensional fluctuation is far less than their time dependent fluctuation ,w hich indi‐cates that a 1D model is a much efficient and convergent method to analyze the releasing efficiency and safety hydrogen storage technique based on hydride metal .
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