Rheological Features of Liquid in Microcracked Channels With the “Microcrack-Liquid” Effect Displayed

Based on experimental and theoretical studies in plane-radial and plane-parallel microcracks, a previously unknown pattern called “microcrack-liquid” effect was established for the first time, that when viscous liquids move in a microcrack at h<hcr, anomalous properties appear, and when anomalous liquids move, rheological parameters increase, at h>hcr these effects disappear. It was revealed that the reason for the manifestation of anomalous properties of Newtonian liquids and the enhancement of the rheological properties of non-Newtonian systems when they move in microcapillary cracks is the new microcrack effect of the “microcrack-liquid” system. The established critical values of crack opening for the studied viscous oils are 160 μm at a temperature of 303 K.