2021/05/14 by Subhadeep Roy, Roy, Subhadeep, Santanu Sinha +3
Engineering · Materials Science · #Enhanced Oil Recovery Techniques #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Lattice Boltzmann Simulation Studies #Pickering emulsions and particle stabilization
paper · pdf · doi:10.48550/arxiv.2105.06847
openalex publication_date 2021/05/14 · openalex created_date 2022/07/25 · openalex updated_date 2026/07/28
The flow of immiscible fluids inside a porous medium shows non-linearity in\nthe form of a power law in the rheological properties of the fluids under\nsteady state flow conditions. However, different experimental and numerical\nstudies have reported different values for the exponent related to this power\nlaw. Here we explore how the rheological properties of the two-phase flow in\nporous media depends on the distribution of the pore sizes and how it affects\nthe power-law exponent. The pore-size distribution controls fluctuation in the\npore radii and their density in a porous material. We present two approaches,\nanalytical calculations using a capillary bundle model and numerical\nsimulations using dynamic pore-network modeling. We observe crossover from a\nnon-linear to linear rheology when increasing the flow rate where the\nnon-linear part is highly affected by the pore-size distribution. We have also\ncarried out the study for different saturations of the two fluids.\n