Modeling of thermal desorption and hydrogen permeability

In the context of problems of hydrogen and thermonuclear power engineering intensive research ofthe hydrogen isotopes properties is being conducted. Mathematical models help to specify physical-chemicalideas about the interaction of hydrogen isotopes with structural materials, to discover the limiting factors.Classical diffusion models are often insufficient. The paper is devoted to the models and numerical solutionof the boundary-value problems of hydrogen thermodesorption and permeability taking into account nonlinearsorption-desorption dynamics on the surface and reversible capture of hydrogen atoms in the bulk. Algorithmsbased on difference approximations. The results of computer simulation of the hydrogen flux from a structuralmaterial sample are presented.