In the last decades, significant progress has been made in understanding themultiphase displacement through porous media with homogeneous wettability andits relation to the pore geometry. However, the role of wettability at thescale of the pore remains still little understood. In the present study thedisplacement of immiscible fluids through a two-dimensional porous medium issimulated by means of a mesoscopic particle approach. The substrate isdescribed as an assembly of non-overlapping circular disks whose preferentialwettability is distributed according to prescribed spatial correlations, frompore scale up to domains at system size. We analyze how this well-definedheterogeneous wettability affects the flow and try to establish a relationshipamong wettability-correlations and large-scale properties of the multiphaseflow.
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