We present a method to determine the effective capillary pressure and permeability of column packed with granular material by means imbibition experiments using closed measuring both liquid uptake differential that develops ahead front. The is based on finding an intermediate range values, where Washburn approximation no longer valid but recently obtained description accurately reproduces exper...

We observed that imbibition of various Rhodamine B-doped wetting liquids in an array of different-sized, horizontal, two-dimensional silica nanochannels terminated within the channels as a function of hydraulic diameter and liquid type. This front termination is not predicted by the classic Washburn equation for capillary flow, which establishes diffusive dynamics in horizontal channels. Variou...

Understanding colloid mobilization during transient flow in soil is important for addressing colloid and contaminant transport issues. While theoretical descriptions of colloid detachment exist for saturated systems, corresponding mechanisms of colloid mobilization during drainage and imbibition have not been considered in detail. In this work, theoretical force and torque analyses were perform...

Seedling growth of mung bean is accompanied by the rapid catabolism of the three major phospholipids in the cotyledons (phosphatidylcholine, phosphatidylethanolamine, and phosphatidylinositol). The decline starts 24 hours after the beginning of imbibition and by the 4th day of growth more than 50% of the phospholipids have been catabolized. Extracts of cotyledons of 24-hour-imbibed beans contai...

Purpose: To evaluate imbibition and syneresis in four commercially available irreversible hydrocolloid (alginate) impression materials at different time intervals (10, 20 and 30 minutes). Materials and methods: Eighty samples of four commercially available irreversible hydrocolloid (alginate) impression materials Algitex (DPI, Mumbai), Plastalgin (Septodont, Cedex, France), Zelgan 2002 (Dentspl...

Experiments with lettuce seeds during the first hours of imbibition showed that oxygen is necessary to sustain high adenine nucleotide ratios and consequently, energy charge values are higher than 0.8 as is usually the case in normally metabolizing tissues.The energy charge value (0.2) of dry seeds soaked in aerated water increased to normal values (0.8) within 30 minutes. The energy charge val...

Surfactant flooding can mobilize trapped oil and change the wettability of rock to be more hydrophilic, which increases recovery factor. However, selection surfactants is difficult in case high salinity conditions. In this work, we synthesized three novel anionic-nonionic based on widely used nonionic surfactant nonylphenol polyethoxylated (NPEO) evaluated their efficiencies for enhanced (EOR) ...

Surfactant-based oil recovery processes are employed to lower the interfacial tension in immiscible displacement processes, change wettability of rock a more water-wet system and emulsify displace it subsurface porous media. Furthermore, these phenomena can reduce capillary pressure enhance spontaneous imbibition. The key factors affecting such process temperature, salinity pH fluids, surfactan...