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Showing 1 to 15 of 15 for “"Miscible Displacement"”.
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Simulation of viscous fingering during miscible displacement in nonuniform porous media
… the effect of different factors on unstable miscible displacement and to clarify the mechanisms of finger growth and interaction. The two-dimensional equations of miscible displacement in a rectangular slab are dedimensionalized and the factors that affect their solution are combined into …
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Cold heavy oil production using CO2-EOR technique.
… technique - Based on conditions investigated, miscible displacement was found to be more efficient for deepwater production. However, immiscible displacement can offer greater reliability with regards to CO2 sequestration. 3. CO2 sequestration during CHOP using CO2-EOR technique – Lower CO2 may …
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Field and laboratory investigations of solute transport through soil
… than the variance single tracer method;A novel miscible-displacement system with on-line high performance liquid chromatograph (HPLC) was developed to study the fate and transport of volatile organic compounds. This system was capable of simultaneous detection of multiple compounds at low …
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The application of high order finite difference methods to the diffusion-convection equation
… diffusion-convection equation that describes the miscible displacement process of resident fluid by an invading fluid in a porous medium is approximated numerically with high order finite difference methods using five adjacent space node points by the Crank - Nicolson formulation. This method is …
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A new passive surface water flux meter for simultaneous measurement of contaminant and water fluxes in streams and rivers
… through the PSFM is assessed by measuring miscible displacement of alcohol tracers from granular activated carbon (GAC). The tracer retardation factors (R) measured by miscible displacement were typically smaller (within 25%) than those estimated from batch studies with sorption of the …
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Speciation of inorganic aluminum solutions and modeling their kinetics and mechanisms of adsorption on selected solids
… montmorillonite, and peat were studied using miscible displacement methods. Unneutralized and partially neutralized Al solutions (OH/Al=1.0) were leached through monomineralic columns and effluent analyzed for monomeric and polymeric Al, titratable acidity, and desorbed Ca as a function of …
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Desorption Kinetics of Lead from Goethite: Effect of Mixing and Sorption Period
In natural systems, the solution concentration and hence, potential bioavailability of trace metals is primarily controlled by adsorption-desorption reactions at the mineral-water interface. While many studies have been conducted to understand the adsorption of trace metals to soil minerals, less …
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Complex flow and transport phenomena in porous media
… and a convection-diffusion type transport with miscible displacement in the subsurface. Initially, I consider the coupled stationary Stokes and Darcy's equations for the flow and establish the existence of a weak solution. Next, imposing additional assumptions on the data, I extend the result to …
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Describing and Predicting Breakthrough Curves for non-Reactive Solute Transport in Statistically Homogeneous Porous Media
… column system was designed for conducting miscible displacement experiments with a free-inlet boundary. Its performance and operating conditions were rigorously evaluated. When the CDE with scale-dependent dispersivity is solved numerically for generating a BTC at a given location, the …
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The geochemical evolution of saline groundwater within a fresh water aquifer south of Oakes, North Dakota
… water down to the water table, and-then by miscible displacement, transport the denser, saline water to the base of the aquifer. Repeated mineral precipitation and dissolution cycles have led to the concentrated saline/brackish water.</p>
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INVESTIGATIONS OF PREFERENTIAL AND MATRIX FLOW IN A MOLE DRAINED SOIL BLOCK
… experiments were conducted; three involved the miscible displacement of chloride at concentrations of 100 and 250 mg I"' and two used nitrate (500 mg l ') and chloride (2500 mg 1') applied as a pulse. Tracer and irrigation water was applied through a misting system at an irrigation rate of 2.76 …
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REACTIVE TRANSPORT OF IRON AND HYDROCHAR COLLOIDS IN A HYDROCARBON-CONTAMINATED SUBSURFACE ENVIRONMENT
… to model break- through curves obtained from the miscible displacement experiments, and a pseudo-first order kinetic equation was used to determine the rate of hydrochar detachment onto soil. In general, hydrochar particles attached to the silty-clay soil primarily via weak hydrophobic …
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Structure-Preserving High Performance Computational Methods for Transport in Porous Media
… coupled flow and transport phenomena such as the miscible displacement of oil in a heterogeneous reservoir.
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Efeito da velocidade de escoamento da solução e do comprimento da coluna de solo nos parâmetros de transporte de solutos em solos argiloso e arenoso
A eficácia dos modelos matemáticos desenvolvidos para descrever o transporte de solutos no solo depende do grau de confiabilidade dos valores dos parâmetros de transporte. Apesar dos trabalhos de determinação destes parâmetros utilizarem a mesma equação de transporte, algumas condições …