The captured images of the miscible flow scenario at different time intervals. The left, middle, and right columns show the experiment images, the segmented images of experiments, and numerical simulation results, respectively. (a) Initial condition, (b) 140 s, (c) 340 s, (d) 540 s, and (e) 1300 s (i.e., breakthrough time). The colored areas (pink and blue) represent the injected fluid; the white areas are pores, and the black areas representing solid grains.