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Posted Wed, 30 May 2012 13:57:06 GMT by jefflew
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?
Posted Fri, 08 Jun 2012 01:45:07 GMT by psinton@aquageo.us
I suggest starting with a simpler model.  There are several available by search on the web.

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