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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 80 for “"imbibition"”.
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Oil recovery by imbibition from polymer solutions
Includes bibliographical references (pages 308-323).
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Injury to Beans (Phaseolus Vulgaris L.) in Relation to Imbibition
Made available in DSpace on 2014-12-12T00:57:20Z (GMT). No. of bitstreams: 1 7212233.pdf: 2709112 bytes, checksum: a6407bc7ec1a265e1266d9805894dfb4 (MD5) Previous issue date: 1971
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Experimental investigation of imbibition in oil-wet carbonates under low IFT conditions
… to determine how to scale up low IFT surfactant imbibition from the lab to fractured, oil-wet carbonate reservoirs. A series of imbibition experiments were conducted using cores with different horizontal (i.e. diameter) and vertical (i.e. height) dimensions. Their fractional oil recoveries (% …
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Modeling fluid imbibition for hydraulic fracturing and its implications on unconventional hydrocarbon recovery
… detailed investigations. Furthermore, fluid imbibition as an important recovery mechanism for fractured reservoirs has been extensively studied, but the focuses were mostly given to capillarity. However, in this dissertation, several contributing fluid flow mechanisms have been identified …
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Random close packing (RCP) of equal spheres: structure and implications for use as a model porous medium
… it is shown from first principles that drainage-imbibition hysteresis is not an intrinsic property of the individual pore. The nature and degree of randomness which characterises the Finney packing is evaluated on two levels. First, by classifying edgelengths as either short or long, seven …
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Changes in muskmelon perisperm envelope tissue during germination
… of the perisperm tissue were studied during imbibition using gas chromatography and high performance thin layer chromatography. The major cell wall sugars identified in the micropylar perisperm tissue were glucose, galactose, xylose, and rhamnose. Endo-β-mannanase has been shown to be …
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Seedborne fusarium and root colonization of container-grown douglas-fir seedlings
… were treated using either a standing water imbibition, or a running water imbibition with a post-stratification hydrogen peroxide sanitation treatment. The sanitation treatment significantly reduced the number of Fusarium-contaminated seeds. Seedlings were grown in an operational conifer …
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Glutathione Dynamics in Arabidopsis Seed Development and Germination
… levels and GR activity (except during late imbibition) in WT and anGR2. In both genotypes, GSH/GSSG ratio increased and GR activity decreased during seed maturation. During imbibition, the glutathione pool becomes very reduced (<1% GSSG) and in WT seeds, GSH levels increase mostly by GSSG …
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Pore-scale dynamics of immiscible two-phase flow on porous and fractured media
… the reduction becomes less significant for both imbibition and drainage. The front of the bottom fingers is finally halted at a position near the inlet as the viscosity ratio increases to 10. Increasing the interfacial tension generally results in higher saturation of the wetting fluid. …
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Identification and characterization of a matrix metalloproteinase (Pta1-MMP) expressed during Loblolly pine (Pinus taeda) seed development and germination
… developmental-stage MMP-like activity. Seed imbibition in water facilited germination, which was stimulated by GA3 and inhibited by ABA. The timing of germination was mirrored by the presence of MMP-like protease activity in both water- and GA3-imbibed embryos. Pta1-MMP transcript levels …
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Interfacial Fluid Dynamics in Porous Media
… properties. We then study the spontaneous imbibition of liquids in capillary tubes, where classical imbibition front slows with time. We propose a simple modification that renders imbibition constant-rate in capillary tubes and allows tuning of viscous dissipation; we use this system to …
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Surfactant-free Aluminum Silicate-based Nanofluids for Enhanced Oil Recovery from Austin Chalk Carbonate Reservoirs
… towards water-wet enhances the spontaneous imbibition of water, resulting in improved oil recovery. In this study, a novel surfactant-free aluminum silicate-based nanofluid is synthesised and tested for its efficiency to alter the wettability of Austin Chalk carbonate rocks from oil-wet to …
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Capillary Force in High Aspect-Ratio Micropillar Arrays
… studied the capillary force induced imbibition of a liquid droplet on a model rough surface consisting of micropillar arrays. Our theoretical model suggests that due to shrinking liquid droplet, the imbibition dynamics does not follow the diffusive Washburn dynamics but progressively …
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On relative permeability : a new approach to two-phase fluid flow in porous media
… of liquid-gas mixtures in steady-state flow in imbibition. Extracting flow rates of the individual phases from the total flow rate of the fluid mixture is the next, but crucial, step that determines whether the average viscosity approach can replace that of relative permeability in solving …
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Mechanistic study of menisci motion within homogeneously and heterogeneously wet porous media
… pore-filling events during drainage as well as imbibition. This generality is essential for modeling displacements in fractionally wet media. Pore filling occurs when an interface becomes unstable in a pore throat (analogous to the Haines condition for drainage in a uniformly wet throat), when …
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A development of regression models for predicting two-phase relative permeability in consolidated rock
… of prediction equations for the water-oil imbibition relative permeability and gas-oil drainage relative permeability from experimental data.</p> <p> Laboratory relative permeability data along with the corresponding rock and fluid properties were collected, and stepwise linear regression …
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Acondicionamiento osmotico de simientes de girasol (helianthus annuus L.) para el avance de la germinación en siembras precoces para zonas áridas
… seeds of cultivars Peredovik and Cargisol by imbibition in water or in a solution of polyethylene glycol with a mean molecular mass of 6 000 units (-0,8 MPa) at 20 ºC, as well as achenes of cv. Peredovik in water at 12 or 20 ºC and in osmotic solutions with a potential of -0,4, -0,8, -1,2 or …
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Particle Detachment in Single-Phase and Two-Phase Flows in Porous Media
… was also investigated during drainage and imbibition in visualisation experiments. Particles remain on the air-water interfaces of residual liquid patches left behind the drainage front. Later, these particles join the imbibition front away from the substrate. In a previously dried channel, …
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Stratigraphy, sedimentology and petrophysics of transgressive tight gas sandstones, Almond Formation, Wyoming
… (SW) models with depth. Primary drainage and imbibition saturation-height models (SHM) were developed from special core analysis and integrated with porosity and permeability logs to verify the SW state of reservoirs. Assuming that reservoirs were fully charged with hydrocarbons, the drainage …
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Liquid manipulation using engineered carbon nanotube surfaces
… First, I study the capillary-driven liquid imbibition in nanoporous ceramic-coated vertically aligned CNT films. Deposition of a conformal ceramic coating prevents capillary-induced deformation of the CNTs, and tailors the nanoporosity. A model based on Darcy's law is found to accurately …
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