Quantitative Analysis of Flow Processes in a Sand Using Synchrotron‐Based X‐ray Microtomography

摘要: Pore-scale multiphase flow experiments were developed to nondestructively visualize water in a sample of porous material using X-ray microtomography. The samples exposed similar boundary conditions as previous investigation, which examined the effect initial rate on observed dynamic effects measured capillary pressure–saturation curves; significantly higher residual saturation and pressures found when was drained fast high air-phase pressure. Prior work applying microtomography technique pore-scale problems has been mostly qualitative nature no have presented existing literature where truly quantitative approach investigating process taken, including thorough image-processing scheme. tomographic images here show, both by comparison analysis form nearest neighbor analysis, that seen are likely due preferential drainage large pores sample. Once continuous path established through sample, further remaining pores, disconnected from main flowing continuum, is prevented.