I was wondering if anyone has tried modelling the diffusion of gaseous oxygen through an unsaturated clay layer. I am investigating a clay cap that was installed over mine tailings to prevent water infiltration and leaching.
Chapter 11 of Vol. 1 of the white papers is relevant, but that is a discussion of gas flow, not diffusion. The obvious difference it that diffusion is driven by a concentration gradient and flow is driven by a pressure gradient, so I am not sure that it really applies.
Any thoughts? Has anyone tried this? Is it possible in FEFLOW?
