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 24 for “"Flow Characterization"”.
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Experimental flow characterization of anguilliform swimming motion
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 2002.
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Compressible Flow Characterization Using Non-Intrusive Acoustic Measurements
… work, the use of acoustics for non-intrusive flow monitoring in compressible flows is explored and a novel sonic anemometry and thermometry (SAT) technique is developed. Using multiple arrangements of SAT equipment, a compressible acoustic tomography technique was also developed to resolve …
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A critical assessment of two phase flow characterization of soil
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1997.
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Fluid Flow Characterization in Rapid Prototyped Common Iliac Artery Aneurysm Molds
… the empirical observations. Plots describing the flow velocities along the maximum streamline path length were generated, and a one sample t-test was conducted at a 5% significance level to determine whether there was a significant difference between velocity values obtained by dye tracking and …
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Flow characterization of the UL Smoke Box and spot-type smoke detectors
… fluid dynamics (CFD) model to characterize the flow fields with the UL Smoke Box and a spot type smoke detector within the test section of the smoke box. The proposed CFD model, designed to reflect the same measured conditions in the UL Smoke Box, was developed and validated through experimental …
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Design and flow characterization of an indraft supersonic wind tunnel for scramjet testing
… features are large windows for advanced optical flow diagnostics, modular experimental mounting system, cycle time under 15 minutes, and adjustable size up to 5.25" x 5.25" x 25". The bulk of this thesis research focuses on flow characterization using a Mach 2.5 nozzle and a test section of 5.25" …
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Colloidal gas aphrons: generation, flow characterization and application in soil and groundwater decontamination
… best described by the Bingham fluid model. CGA flow through porous media follows the discontinuous fluid flow model with the liquid phase advancing faster than the gas phase. The presence of CGA bubbles causes considerable reduction of effective mobility compared to water flow. The bubbles act …
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Fluid Flow Characterization and In Silico Validation in a Rapid Prototyped Aortic Arch Model
… validate a theoretical computer model through flow visualization. The hypothesis was that the empirical model can accurately mimic the fluid dynamic properties of the aortic arch in order validate an in silico model using the finite elements program COMSOL MultiPhysics® Modeling Software. The …
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Fluid Flow Characterization and In Silico Validation in a Rapid Prototyped Abdominal Aortic Aneurysm Model
… aneurysm repair (EVAR). Understanding how the flow of the blood within the artery is affected by the aneurysm is important in determining the growth of the aneurysm, as well as how to properly treat the aneurysm. The goal of this project was to develop a physical construct of the AAA, and use …
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Flow Characterization and Redesign of Load-Leveling Valves for Improving Transient Dynamics of Heavy Truck Air Suspensions
This research provides a thorough flow characterization study to compare the functionality of two types of load-leveling valves that are commonly used for air suspension systems of commercial trucks. The first valve features a simple disk/slot design and is relatively compact for installation. The …
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Tools and Techniques for Flow Characterization in the Development of Load Leveling Valves for Heavy Truck Application
… Fluid Dynamics (CFD) model as a robust tool for flow characterization of load leveling valves. The load leveling valve is a critical component of an air suspension system since it manages air spring pressure, a key function that directly impacts vehicle dynamic performance in addition to …
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Hemodynamic Flow Characterization of St. Jude Medical Bileaflet Mechanical and Bioprosthetic Heart Valve Prostheses in a Left Ventricular Model via Digital Particle Image Velocimetry
… replacement operation will greatly depend on the flow character downstream the mitral valve thus a better understanding of the flow character is essential. Most in vitro studies of the flow downstream of a MHV have been conducted with the valve in the aortic position. Researchers reported detailed …
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Experimental investigation of induced-charge electro-osmosis
… in the context of microfluidics. Simple ICEO flows are first observed around a platinum wire in a polymer microchannel. While convenient for scaling analysis of resulting flows, this geometry proved difficult to analyze because of sensitivity to measurement height. This motivated the …
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Experimental and numerical study of flow characteristics and segregation in flow enhanced systems
… two major topics of importance are powder flow enhancement mechanisms and the flow characterization. This dissertation is involved with both of these topics. With respect to the powder flow enhancement, this study involves investigation of two types of flow enhancement methods. The first …
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Zooplankton in Flowing Waters
… features. The current study assessed the role of flow in characterizing the microcrustacean zooplankton community of the Missouri River. I also designed an artificial flow chamber for observing species-specific responses to flow. Missouri River zooplankton samples and physico-chemical variables …
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Fluid Sealing Challenges in Solid Oxide Electrolysis Cells and Rapid Swap Battery Systems
… the development of seal geometries as well as flow characterization of porous steel wool seals to enable parametric design is documented. As an alternative to current sealing methods, initial development of a composite seal utilizing materials and manufacturing methods originating in the …
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Biomass reforming processes in hydrothermal media
… of biomass, a supercritical-water reverse-flow vessel (RFV) may be employed to precipitate the salts from the biomass before the biomass is brought into contact with catalysts. However, these vessels are subject to blockage, and flow characterization within the vessels has largely been …
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Numerical Study of Mixing of a Supercritical Jet in a Supercritical Environment
… campaign is conducted to better elucidate flow physics and modeling requirements of a supercritical (SC) nitrogen jet injected into a tank of quiescent SC nitrogen. The goals of this work are twofold: to inform the design of injectors and combustion chambers for use in the direct-fired …
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Effects of boundary roughness on turbulence in uniform open channel flow
… of sediment transport and mixing in open-channel flows. In this study, using highly controlled laboratory experiments, the effects of various bed configurations on turbulence, shear stresses, and other parameters have been analyzed and quantified and the results compared to previous research. A …
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Measurement Drift in 3-Hole Yaw Pressure Probes From 5 Micron Sand Fouling at 1050° C
… probes are capable of accurately measuring flow angles in the yaw plane. These probes can be utilized inside a jet engine hot section for diagnostics and flow characterization. Sand and other particulate pose a significant risk to hot section components and measurement devices in gas turbine …
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