Global ETD Search
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 15 of 15 for “"fluid displacement"”.
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Fluid-fluid displacement in porous-media microfluidics
Immiscible fluid-fluid displacement under geometric confinement is a key physical process in large-scale subsurface energy technologies such as geologic carbon sequestration and in small-scale microfluidic techniques. Research over the past few decades has provided improved understanding of the …
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Interfacial Fluid Dynamics in Porous Media
A beautiful array of patterns emerges when one fluid displaces another in porous media, a physical situation prevalent in many clean energy production and storage applications. These patterns can be reminiscent of dielectric breakdown, diffusion-limited growth of crystals, or percolation clusters …
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Characterizing grippers for transmitting prosthetic device for upper limbs
… transmitting prosthetic device. This device uses fluid displacement to provide force feedback to the user, allowing the user to feel how much force they are gripping an object with. The device consists of two molded rubber fingertips filled with fluid and actuated by a motor. Various strengths and …
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Wetting transition and fluid trapping in a microfluidic fracture
During immiscible fluid-fluid displacement in partial wetting regime, defending fluid is often trapped as a liquid film on solid surfaces through the mechanism of wetting transition. Here, we study the impact of roughness on wetting transition and fluid trapping in a microfluidic fracture. We …
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NONLOCAL AND NONLINEAR EFFECTS ON SOLAR OSCILLATIONS (RADIATIVE DAMPING, LIMB DARKENING).
… temperature perturbations (compared to the fluid displacement) that were much too small to be observed. Much larger ratios were found when the radiative transfer was treated properly. A particular solar oscillation can be influenced by the presence of a large number of other modes, if these …
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Development of an Ingestible Fluid Wicking Gastric Electrical Stimulation Platform for Hormone Modulation
… mucosal layer remains challenging due to gastric fluid that can disrupt targeted stimulation. In this work we first elucidate and establish the relationship between gastric electrical stimulation (GES) and the production of ghrelin, a hormone associated with hunger, in a pig model. Next, we …
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Multiphase flow in porous media: the impact of capillarity and wettability from field-scale to pore-scale
… refers to the simultaneous flow of immiscible fluids. It differs significantly from single-phase flow due to the existence of fluid-fluid interfaces, which are subject to capillary forces. Multiphase flow in porous media is important in many natural and industrial processes, including geologic …
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A novel approach to upscaling reservoir simulation modelling for polymer processes
… crossflow, and reservoir heterogeneity govern fluid displacement and sweep efficiency. While detailed grid resolutions are essential for accurately capturing these processes, their computational intensity necessitates upscaling methods to balance precision and efficiency. This research develops …
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Photoporomechanics: a new technique to explore grain-scale mechanisms for fluid-driven fractures in granular media
… and geological carbon dioxide storage. While fluid–fluid displacement in rigid porous media has been studied in depth, the understanding of the interplay between multiphase flow and granular mechanics remains an ongoing challenge. Photoelasticity has been used as an experimental technique to …
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NMR Studies of Enhanced Oil Recovery Core Floods and Core Analysis Protocols
… Laboratory-scale core floods, in which one fluid displaces another from the pore space of a rock core, are widely used in petroleum research for oilfield evaluation and screening EOR processes. Achieving both macro- and pore-scale understandings of such fluid displacement processes is …
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Underwater Robotic Propulsors Inspired by Jetting Jellyfish
… modeled to elucidate the role of structure and fluid displacement. Utilizing the results from Chapter 2, a free-swimming jellyfish-inspired robot (named JetPRo) was developed (also utilizing an iris diaphragm) in Chapter 3 and characterized for relevant propulsive metrics. A combination of …
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Diagenetic controls on porosity, thermal history, and hydrocarbons in the Wolfcamp A, eastern Midland Basin, Texas
… as well as δ18O, δ13C, 87Sr/86Sr, and fluid inclusion analyses were performed. The diagenetic history could be divided into stages: Early Stage occurred near the sediment-water interface; Burial Stage occurred during burial and before tectonic fracturing; and Fracturing Stage occurred …
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Prediction of Capillary Pressure and Relative Permeability Curves using Conventional Pore-scale Displacements and Artificial Neural Networks
… properties. Specifically, we simulate fluid displacement sequences during a drainage process in bundles of capillary tubes with randomly generated convex polygon cross-sections. In the beginning, we assume that capillary tubes are fully saturated with water and that they are strongly …
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Digital Rock: Understanding the mechanism of Enhanced Oil Recovery (EOR) Core Floods
… Resonance (NMR) has been employed to detect fluid displacement at reservoir-representative velocities and dynamically monitor the oil and water behaviour during brine and polymer core flooding. The first step for the analysis of the physical phenomena was the detection of velocities lower …
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Multiphase mechanisms and fluid dynamics in gas injection enhanced oil recovery processes
… are the controlling multiphase mechanisms and fluid dynamics in gravity drainage processes?, (iv) what are the mechanistic issues relating to gravity drainage?, and (v) how can we model the novel GAGD process using traditional analytical and empirical theories and (vi) what are the roles of the …