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. 2016 Oct 26;6:36221. doi: 10.1038/srep36221

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Copyright © 2016, The Author(s)

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Increasing disorder increases the invasion selectivity, namely the mean invaded pore throat size (panel a) by avoiding small pores (b). At low λ, the invasion samples nearly equally all throat sizes (c), such that . Selectivity is further reduced with the wetting angle θ, due to increasing occurrence of overlaps which are less sensitive to aperture sizes than bursts. In contrast, selectivity increases with rates, as screening produces thin fingers which completely bypass low permeability regions. Lines and shading in (a) are ensemble mean and standard deviation among four realizations. Panels b and c show the probability density function (pdf) of invaded throat sizes (r_inv, colored lines), and the triangular throat size distribution (r, black dots) for two samples, λ = 0.82 (b) and 0.22 (c).

Inline graphic — Increasing disorder increases the invasion selectivity, namely the mean invaded pore throat size (panel a) by avoiding small pores (b). At low λ, the invasion samples nearly equally all throat sizes (c), such that . Selectivity is further reduced with the wetting angle θ, due to increasing occurrence of overlaps which are less sensitive to aperture sizes than bursts. In contrast, selectivity increases with rates, as screening produces thin fingers which completely bypass low permeability regions. Lines and shading in (a) are ensemble mean and standard deviation among four realizations. Panels b and c show the probability density function (pdf) of invaded throat sizes (r_inv, colored lines), and the triangular throat size distribution (r, black dots) for two samples, λ = 0.82 (b) and 0.22 (c).