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Showing 1 to 18 of 18 for “"Micromodel"”.
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Effect of temperature on oil/water relative permeabilities in microfluidic micromodel, The
… permeability was studied in a microfluidic micromodel system. First, the microfluidic micromodel fabrication procedures using Norland Optical Adhesive 81 (NOA81) was demonstrated. Images from two-phase flow displacement experiments were captured, processed and analyzed with MATLAB Image …
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Analysis of Solute Mixing at the Pore-Scale Using Micromodels and Lattice -Boltzmann Finite Volume Modeling
… of pore scale modeling and high-resolution 2D micromodels. To evaluate reactive transport, two reactive substrates are introduced into a network of pores via two separate and parallel fluid streams. The substrates mix within the porous media via transverse dispersion and react. In micromodel …
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Development of photo-patterned composite structures in microchannels for oil reservoir research
… glass microchannels, we develop a new method of micromodel fabrication. We build composite structures in a bottom-up manner with ultraviolet projection lithography where the composite structures are composed of tricyclodecane dimethanol diacrylate and stearic-acid treated calcium carbonate …
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Hierarchical material models with microstructure for nonlinear analysis of progressive damage in laminated composite structures
… material model for the matrix behavior; a micromodel for the unidirectional lamina; and a sublaminate model for a repeating ply stacking sequence. Newly developed orthotropic elastic-degrading (ED) material models are formulated in order to represent the nonlinear brittle behavior of the …
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Immiscible liquid-liquid displacement in microfluidic channels : effects of wettability and geometry
… in oil-water-rock systems. Microfluidic devices, micromodels, have been proposed as experimental test beds for reproducing flows in oil reservoirs in laboratory environments since they offer fine control over geometry and chemistry, and therefore provide insights into their effects on the process. …
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Analysis of Pore -Scale Nonaqueous Phase Liquid Dissolution in Etched Silicon Pore Network
… transfer coefficients for dissolution in all micromodel experiments. Mass transfer coefficients for the homogeneous and heterogeneous micromodels initially increased with water velocity but then leveled off to a relatively constant value. Also, these mass transfer coefficients varied with pore …
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ΑΝΑΛΥΤΙΚΗ ΕΡΕΥΝΑ ΤΗΣ ΑΠΟΚΡΙΣΗΣ ΤΟΙΧΟΠΟΙΙΑΣ ΥΠΟ ΜΟΝΟΤΟΝΗ ΕΠΙΠΕΔΗ ΚΑΤΑΠΟΝΗΣΗ ΜΕΧΡΙΣ ΑΣΤΟΧΙΑΣ
… DEVELOPMENT OF A NON LINEAR ZP FINITE ELEMENT MICROMODEL FOR THE ANALYSIS OF UNREINFORCED MASONRY UNDER MONOTONIC IN-PLANE LOADING UNTIL FAILURE. THE MODEL IS CAPABLE OF SIMULATING DAMAGES IN MASONRY UNITS, MORTAR OR JOINTS AND PREDICTING BOTH JOINT OR COMPOSITE TYPE FAILURE DUE TO IN …
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Roles of surface interaction on Cryptosporidium parvum oocyst transport in subsurface environment
… point flow (RSPF) cell and 2-dimensional (2-D) micromodels. The quartz or natural organic matter coated quartz surfaces were used as collector in the RSPF cell. The cylindrical silica collectors or silica collectors coated with 0, 10, 20, 50 and, 100% Fe2O3 patches were firstly fabricated in …
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Extracting Physically Realistic Pore Network Features from XCT Data and Investigating the Impact of Pore Topology on Flow in Porous Media
… differences, and/or similarities between a 2.5D micromodel pore structure created from a 3D-Boise Sandstone pore structure. A combination of MIP data and physically realistic pore network drainage simulations were used to account for the pore space and the characteristic throat sizes that can be …
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Precipitation and Dissolution of Uranyl Phosphates in a Mircofluidic Pore Structure
… evaluated in a microfluidic pore structure (i.e. micromodel) to assess the efficacy of using a phosphate amendment to immobilize uranium in groundwater and mitigate the risk of this contaminant to potential down-gradient receptor sites. U(VI) was mixed transverse to the direction of flow with …
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Understanding Formation and Transport of Amorphous Iron Oxyhydroxides in Porous Media using Microfluidic Flow Cells- a Novel Method to Study Freshwater Iron Cycling
… the water column. We constructed an experimental micromodel that to observe key processes that affect biogeochemical iron cycling in the fresh water interface zones where the oxic surface water mixes with Fe (II) rich underlying ground water. The flow cell was constructed from …
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Modeling single-phase flow and solute transport across scales
… pore-scale methods and validated against micromodel experiments as well as experimental data from the literature. Studies regarding the significance of different pore-level mixing assumptions (perfect mixing vs. partial mixing) in disordered media, as well as the predictive capacity of …
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Pressure Pulsing Potential During Waterflooding and CO2 Flooding of Heavy Oil Reservoirs
… of the second group of experiments, where the micromodel was used, was to visualize the displacement process in porous media, and to compare fluid flow behavior in the model, with and without implementing PPT.
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Image-Based Modeling of Porous Media Using FEM and Lagrangian Particle Tracking
… Two XCT images, a Berea sandstone and a 2.5D micromodel, were meshed and used for image-based flow modeling of FEM Stokes flow. The effects of particle size, surface forces, flow rate, particle density, surface capacity, and surface forces mapped to XCT-image based mineralogy were studied.
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3D printing-based microfluidics for geosciences
… setup allows for cheap and fast fabrication of micromodel devices from simple to complicated multiscale geometries, which enable the ability to perform repeatable single-phase flow species transport experiments. We use Particle Image Velocimetry (PIV) and Direct Numerical simulations (DNS) to …
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The effect of calcium and magnesium on carbonate mineral precipitation during reactive transport in a model subsurface pore structure
Carbonate mineral precipitation in the subsurface at the interface of two advecting fluids can result in physical and chemical changes in the pore network. This can affect the effectiveness of various applications including carbon sequestration and in situ remediation. In this work we evaluate the …
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A Multiscale Study of Foam: The Phase Behavior, Transport, and Rheology of Foam in Porous Media
… was also visualized in a 3-layered heterogeneous micromodel at the pore-level. Foam was shown to respond to the porous media heterogeneity by separating into a relatively dry and wet regime in the high- and low-perm regions respectively. Due to the capillary continuity between the layers of …
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Experimental and Modelign of Foam Physics in Porous Media
… recovery experiments are performed in an oil-wet micromodel where high permeability channels are included to mimic wormholes in unconsolidated sandstone reservoirs during sand production. Through oil recovery experiments, the pore-scale interactions between AOT-NPs foam and heavy crude oil are …