Multi-phase flow modeling of air sparging

M.I.J. Dijke, van, S.E.A.T.M. Zee, van der, C.J. Duijn, van

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    Air injection into groundwater (air sparging) in a homogeneous axially symmetric porous medium is modeled using a two-phase flow approach. A numerical method based on the mixed form of the Richards equation for both phases is presented. Furthermore two analytical approximations are discussed to explain the numerical results. One is a one-dimensional description explaining the occurrence of small air saturations. The other is a closed form approximation for the distribution of the air saturation in the resulting steady state. From the latter we can estimate the maximum radius of influence of air sparging, as a function of the physical parameters. The analytical approximation at steady state and the numerical results are in good agreement.
    Original languageEnglish
    Pages (from-to)319-333
    Number of pages15
    JournalAdvances in Water Resources
    Issue number6
    Publication statusPublished - 1995


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