Asymptotic analysis of a transport model of organic material through a stratified porous medium: Concentration effect

摘要

We consider the transport through capillarity of an organic material inside a porous medium, using Leverett's model. We first prove an existence result for a weak solution of this nonlinear evolution problem, using a regularization process. We then describe the asymptotic behavior of the solution, when the permeability k_ε of the porous medium is associated to a scalar function which only depends on the third variable, assuming that k_ε (resp. the inverse of k_ε) converges to some measure λ. (resp. λ~*). We use Γ-convergence arguments in order to describe this asymptotic behavior. We finally characterize the asymptotic behavior of the problem, considering special choices of the permeability k_ε which correspond to stratified porous media, and give a numerical test for a ID model.