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 20 of 22 for “"flow transport"”.
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Flow-Transport Modeling and Quantification
… investigations have been conducted on the flow and sediment transport over bed forms in alluvial rivers (e.g. mean flow field, turbulence, shear partitioning, bed load transport and bed form geometry). Much of this work was either laboratory studies or small scale field investigations. …
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Novel Bioinspired Pumping Models for Microscale Flow Transport
… inspired and motivated by microscale internal flow transport phenomena in insect tracheal networks, which are observed to be induced by the rhythmic tracheal wall contractions. These networks have been shown to mange fluid very efficiently compared to current state-of-the-art microfluidic …
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Modeling multicomponent vacuum flow, transport, and outgassing in a membrane-inlet vapor sampling probe
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1994.
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A three-dimensional two-phase model for flow, transport and mass transfer processes in sewers
… infrastructure. Their functionality ensures the transport of wastewater to the sewage treatment plant and the transport of rainwater from residential areas. Damages to sewers cause infiltration and exfiltration and at the same time high costs for rehabilitation. The formation of hydrogen sulphide …
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Nonequilibrium Phenomena in Multiphase Flow, Transport, and Phase Change in Porous Media: Pore-Level Physics, Network Modeling, and Upscaling
Multiphase fluid flow, multicomponent transport, and thermodynamic phase change in porous media are important for many subsurface environmental and energy applications, including vadose zone contaminant transport and shale oil and gas production. Understanding these complex physical processes …
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Extension and further validation of a 3D two-phase flow model for flow, transport and mass transfer in sewer systems
… city. Their vital role lies in efficiently transporting both wastewater to treatment facilities and rainwater from residential areas. The emission of hydrogen sulphide (H2S) combined with the oxygen (O2) present in the system can pose a significant threat to the integrity of concrete …
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Advancing the theory and applications of Lagrangian Coherent Structures methods for oceanic surface flows
Ocean surface transport is at the core of many environmental disasters, including the spread of marine plastic pollution, the Deepwater Horizon oil spill and the Fukushima nuclear contamination. Understanding and predicting flow transport, however, remains a scientific challenge, because it …
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Advancing the theory and applications of Lagrangian Coherent Structures methods for oceanic surface flows
Ocean surface transport is at the core of many environmental disasters, including the spread of marine plastic pollution, the Deepwater Horizon oil spill and the Fukushima nuclear contamination. Understanding and predicting flow transport, however, remains a scientific challenge, because it …
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Characterization of Lower Permian Carbonate Subaqueous Gravity Flows in Crockett County, Texas
… environments lies in the allochthonous gravity flow sediments found on the slope. Here, a succession of various gravity flow deposits is used to interpret how base level fluctuations affect the type of deposits found on the slope and their effect on the deep basinal environment. This study …
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Modelling cardiopulmonary interactions. Towards anatomically detailed and physiologically accurate cardiorespiratory models
… model that couples the fine description of blood flow in 1D domains obtained through the closed-loop Anatomically-Detailed Arterial-Venous Network (ADAVN) model with a PDE model for passive scalar transport and ODE models describing lung and peripheral gas exchange, lung mechanics and local …
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Biologically inspired transparent material as an energy system
… of the absorber by activetailored flows in a microfluidic based platform, than conventional IR static absorbers.Nature’s characterization of materials is a thermally dynamic response in real time toa microenvironment. This functionality of heat seeking materials would advance a …
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Measurements of Flow in Boundary Layer Ingesting Serpentine Inlets
… ow to the engine. These inlets produce distorted flow profiles that can cause aeromechanical, stability, and performance changes in embedded engines. Proper design of embedded engine systems requires understanding of the underlying fluid dynamics that occur within serpentine inlets. A serpentine …
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Analysis of Three Dimensional Turbulent Shear Flow Experiments with Respect to Algebraic Modeling Parameters
… turbulent boundary layers into three dimensional flows has met with limited success. The failure of the extended models is attributed to the anisotropy of the turbulence. This is seen by the turbulent shear stress angle lagging the flow gradient angle and by the behavior of the Reynolds shear …
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Thermo-Capillary Driven Flow Under the Influence of Rotation and Magnetic Fields
… the latter being the dominant convective flow in a microgravity environment, significant advantages can be achieved in space based processing. The control of this surface tension gradient driven flow is sought using (1) rotation and (2) magnetic field, and the effects of these are …
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Design and application of flux corrected transport for reactive solute transport modeling
Understanding reactive solute transport, which couples flow , transport, and chemical/ biological reaction in porous media, is important in areas such as aquifer remediation, groundwater contamination and geochemical reaction modeling. Due to the large time scales involved, lack of accessibility to …
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Sediment in forested and logged gullies, coastal British Columbia
… storage and transfers. Both fluvial and debris flow transport of sediment occur in gullies, and the amount of fluvial transport of sediment which occurs will affect the magnitude of a subsequent debris flow. Coarse woody debris (CWD) may affect the storage and transfer of sediment in the gully …
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High Resolution Simulation of Laminar and Transitional Flows in a Mixing Vessel
… describe and characterize the distinct flow regimes existing within a mixing vessel at various rotational speeds. This investigation is computational in nature and simulates the flow within a baffled tank containing a Rushton turbine of the standard configuration. For a Re based on …
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Packed bed reactors at the pellet scale: magnetic resonance studies of hydrodynamics, mass transport and reaction
… use of packed bed reactors in industry, the flow, transport, and reaction phenomena occurring at the scale of individual catalyst pellets is poorly understood due to a lack of experimental techniques capable of non-invasively probing these phenomena at the pellet scale. This thesis presents …
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Potencial energético de las corrientes generadas por las mareas en las desembocaduras de los ríos y estuarios. Aplicación a la ría de Avilés
… con objetivos diferentes, abarcando desde el transporte de sedimentos a estudios de las corrientes. Para ello recurren a las ecuaciones de transporte de flujo de Navier-Stokes, aunque dada la complejidad de cálculo de las mismas realizan diferentes simplificaciones: consideran una sola fase, …
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Iron Modified Bismuth Titanate Pyrochlore Photocatalysts for Environmental Remediation and Solar Fuel Production
… techniques. Traditional catalysis involves the flow, transport, and adherence of reactants, typically in gas or liquid phase, to recyclable catalysts, while electrochemistry involves the extrusion of electrical charge carriers for direct electrical energy or redox reactions. Combining these two …
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