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Showing 1 to 20 of 144 for “"Miscible"”.
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Preparation of Fully Miscible Nanocomposites
… nanoparticles in solution, to prepare completely miscible polymer nanocomposites with a controllable distance between nanoparticles, and to induce and control aggregation into percolation networks in polymeric matrices for a variety of different nanoparticle/polymer combinations. Not only …
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Physical Aging of Miscible Polymer Blends
… and enthalpy) were assessed for two different miscible polymer blends as a function of both composition and aging temperature. This investigation considered the physical aging behavior of blends containing atactic polystyrene (a-PS) and poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) as well as …
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Radial Miscible Viscous Fingering of Icelandic Mantle Plume
… plume. It is proposed that these radial miscible fi ngers develop due to the Saffman-Taylor instability, a fluid dynamical phenomenon which occurs when a less viscous fluid is injected into a more viscous fluid. Mobility ratio (i.e. the ratio of fluid viscosities), Peclet number (i.e. the …
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Understanding the evolution of miscible viscous fingering patterns
… a better understanding of the evolution of miscible viscous fingering patterns is necessary for being able to accurately determine the mixing efficiency of a fingering pattern.
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Laminar and turbulent dispersion of miscible fluids in porous media
… of longitudinal dispersion in the flow of miscible fluids through porous media was studied in this investigation. The relationship between the longitudinal dispersion coefficient and the average pore velocity was found experimentally for the three regimes of fluid flow in a porous medium. …
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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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Hot-melt mixing of partially miscible active pharmaceutical ingredient-polymer mixtures
Solid dispersion/solution processes for producing pharmaceutical oral dosages such as hot-met extrusion (HME) have received increasing attention by industry and academe because they can enhance drugs' solubility and even bioavailability to a great extent by converting drugs from crystalline to …
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Heat Transfer and Hydrodynamics of Miscible/Immiscible Systems in Microchannel Devices
… hydrodynamics for both the single-phase/miscible and multiphase/immiscible systems have been studied. This work starts with the effect of the nanoparticles (NPs) on heat transfer enhancement in microchannel devices. The NPs non-homogeneous distribution and their impact on the heat removal …
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Toughening mechanisms in composites of miscible polymer blends with rigid filler particles
… was characterized using TEM, and was found to be miscible over much of the PVC-rich domain. The blend Tg's fit well to an empirical model, which was used to predict a constant-Tg ([approx.] 40°C) blend series. Mechanical testing showed a wide, systematic variation in properties among these blends, …
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Low Interfacial Tension Foam Miscible Ethane Oil Recovery in Low Permeability Harsh Environments
… investigation of low interfacial tension miscible ethane foam enhanced oil recovery in low permeability, heterogeneous, harsh environments (<15md, 136,000ppm total dissolved solids with divalent ions, 74°C). Minimum miscibility pressure displacement tests were performed for dead crude oil …
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Understanding the role of kinetic parameters on the crystallization of miscible semicrystalline polymer blends
… kinetic, morphology and scattering studies on miscible semi crystalline blends of poly(pivalolactone)/ poly(vinylidene fluoride)(pPVLIPVF₂) and poly(pivalolactone)/poly(vinylidene fluoride <i>co</i>- tetrafluoroethylene)(95-5) (PPVL/P(VF2-TFE)(95-5)) prepared by solution blending. The …
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Single Well Completion and Management Strategies for Enhanced Recovery of Tight Oil Using Miscible Gas Injection
… an alternative, operators have tried alternating miscible gas injection with production in a single well mimicking the huff-and-puff (HAP) technique that originated with steam injection in heavy oil wells. HAP field tests in the Eagle Ford play have shown limited success. To improve the production …
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Mixing with complex patterns : from the impact of miscible viscous fingering to the effects of motile bacteria
… Thesis, we experimentally quantify the impact miscible viscous fingering has on mixing. We use a radial Hele-Shaw cell as an analog of radial flows in porous media, and high-resolution fluorescent imaging, to measure the temporal and spatial evolution of the mixing zone. We identify distinct …
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Optimum Timing for CO2-EOR After Waterflooding and Soaking Effect on Miscible CO2 Flooding in a Tight Sandstone Formation,
… after waterflooding and soaking effect on miscible CO2 flooding in a tight sandstone formation. First, the saturation pressure (Psat), oil-swelling factor (SF), gas–oil ratio (GOR) of CO2- saturated light oil, and gas–water ratio (GWR) of CO2-saturated reservoir brine were measured by using …
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Prediction of turbulent mixing at the interface of density stratified, shear flows using CFD
… dealt with a homogeneous shear flow involving miscible fluids. The other set of simulations dealt with a developing shear layer involving immiscible fluids. The re-fueling of a compensated fuel/ballast tank, which is partially characterized by a shear layer, was also simulated. In all the …
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The complex behavior of poly(dte) carbonate and its blend properties
… with it. The desired outcome was to produce miscible polymer blends or significant phase shift in the blended materials which will make them at least partially miscible to each other. Differential scanning calorimetry (DSC) and thermally stimulated current (TSC) analysis of the material …
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A unified multi-physics formulation for combustion modelling
… In particular, we are interested to capture miscible and immiscible behaviour within condensed-phase explosives arising from the co-existence of a reactive carrier mixture of miscible materials, and several material interfaces due to the presence of immiscible impurities such as particles or …
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Thermomechanical properties of polyhedral oligomeric silsequioxane- poly(methyl methacrylate) nanocomposites
… tethered to the PMMA backbone. A highly miscible acrylic-POSS species plasticizes PMMA, decreasing the glass transition temperature by approximately 10⁰C at a loading of 10 vol%. An essentially immiscible POSS species (cyclohexyl-POSS) does not alter the ... of PMMA but is able to …
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Flow and mixing in complex porous media
… features of such flows; the mixing of miscible fluids of differing viscosity and density in both homogeneous and heterogeneous porous media, and the flow-induced deformation of soft, poroelastic media. In all cases the approach is to combine detailed numerical or experimental …
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