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We generalize to three dimensions (3D) a recently developed improvedmulti-component pseudopotential lattice Boltzmann method and analyze itsapplicability to simulate flows through realistic porous media. The model isvalidated and characterized via benchmarks, and we investigate its performanceby simulating the displacement of immiscible fluids in 3D geometries. Twosamples are considered, namely, a pack of spheres obtained numerically, and aBentheimer sandstone rock sample obtained experimentally. We show that, withthis model it is possible to simulate realistic viscosity ratios, to tunesurface tension independently and, most importantly, to preserve the volume oftrapped fluid. We also evaluate the computational performance of the model onthe Graphical Processing Unit (GPU) and mention the implemented optimizationsto increase the computational speed and reduce the memory requirements.

Study of fluid displacement in 3D porous media with an improved multi-component pseudopotential lattice Boltzmann method