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Filtering by: Creator Hewkin%2C James A. Remove constraint Creator: Hewkin%2C James A. Degree Field Mechanical Engineering Remove constraint Degree Field: Mechanical Engineering

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  • Study of creeping, inertial and turbulent flow regimes in porous media using particle image velocimetry

    Creator:
    Patil, Vishal A.
    Abstract:
    Porous media flows are encountered in many natural and man-made systems such as gas adsorption, filtration, heat exchangers, combustion, catalytic reactors and groundwater hydrology. This study experimentally investigates these flows as function of pore Reynolds number, Re[subscript pore]. The pore Reynolds number is based on the porous bed hydraulic diameter,...
    Resource Type:
    Dissertation
    Full Text:
    : _______________________________________________________ James A. Liburdy Porous media flows are encountered in many natural and man-made systems

  • Micro-bubble dynamics in two-phase flow through a micro-channel

    Creator:
    Shepard, Thomas G.
    Abstract:
    An experimental investigation into the behavior of micro-bubbles flowing through a micro-channel has been conducted. Experiments were performed within a rectangular micro-channel with dimensions of 5 cm x 13.2 mm x l30 jim. Bubbles were generated in an electrolyte solution by electrolysis at the lower channel wall near the inlet....
    Resource Type:
    Masters Thesis
    Full Text:
    Dynamics in Two-Phase Flow Through a Micro-channel. Abstract approved: James A. Liburdy An experimental

  • Heat transfer during the piston-cylinder expansion of a gas

    Creator:
    Rodrigues, Matthew Jose
    Abstract:
    The expansion of a gas within a piston-cylinder arrangement is studied in order to obtain a better understanding of the heat transfer which occurs during this process. While the situation of heat transfer during the expansion of a gas has received considerable attention, the process is still not very well...
    Resource Type:
    Masters Thesis
    Full Text:
    James A. Liburdy The expansion of a gas within a piston-cylinder arrangement is studied in order

  • Effect of Active Trailing Edge Motion Upon Airfoil Energy Harvester

    Creator:
    Strahl, Jordan D.
    Abstract:
    The application of a flapping foil with prescribed trailing edge motion to energy harvesting in a low reduced frequency (k = fc/U∞) regime was experimentally studied. The effects of the phase and amplitude of the applied trailing edge motion upon time-variant power extraction capability have been measured and are interpreted....
    Resource Type:
    Masters Thesis
    Full Text:
    : Effect of Active Trailing Edge Motion Upon Airfoil Energy Harvester Abstract approved: James Liburdy

  • Experimental Investigations of the Unsteady Aerodynamics of Oscillating Airfoils Operating in the Energy Harvesting Regime

    Creator:
    Siala, Firas F.
    Abstract:
    The rising global trend to reduce dependence on fossil fuels has provided significant motivation toward the development of alternative energy conversion methods and new technologies to improve their efficiency. Recently, oscillating energy harvesters have shown promise as highly efficient and scalable turbines, which can be implemented in areas where traditional...
    Resource Type:
    Dissertation
    Full Text:
    Harvesting Regime Abstract approved: James A. Liburdy The rising global trend to reduce dependence on

  • An experimental study of natural convection in air between a vertical isothermal flat plate and a parallel insulated flat plate

    Creator:
    Kim, Sung-Soo
    Abstract:
    Natural convection heat transfer in air between two vertical plates 38 by 24 inches was investigated in this work with spacings between the plates of 0.625, 1.0 and 1.75 inches. One plate was isothermal and the other adiabatic. To measure the point velocities in the air layer a very thin...
    Resource Type:
    Masters Thesis
    Full Text:
    FLAT PLATE AND A PARALLEL ,INSULATED. FLAT PLATE Redacted for privacy James R. Welt Abstract approved

  • The effects of pulsing and blowing ratio on a 45° inclined jet in cross flow

    Creator:
    Stander, Arjan
    Abstract:
    The effect of jet flow pulsing and blowing ratio on a jet in cross flow has been investigated. Preliminary jet flow studies were performed without cross flow and an extensive study of jet with cross flow was done for a total of nine test cases. The effect of velocities ratios...
    Resource Type:
    Masters Thesis
    Full Text:
    and Blowing Ratio on a 45° Inclined Jet in Cross Flow. Abstract approved: urdy De orah V. Pence The

  • A numerical study of solid fuel combustion in a moving bed

    Creator:
    Ko, Daekwun
    Abstract:
    Coal continues to be burned by direct combustion in packed or moving bed in small size domestic furnaces, medium size industrial furnaces, as well as small power stations. Recent stringent restrictions on exhaust emissions call for a better understanding of the process of combustion of coal in beds. The present...
    Resource Type:
    Dissertation
    Full Text:
    A numerical study of solid fuel combustion in a moving bed

  • Leading Edge Separation Analysis of Oscillating Airfoil Energy Harvesters

    Creator:
    Ngo, Vickie
    Abstract:
    Oscillating foil energy harvesters are analyzed at optimal reduced frequencies (𝑘=𝑓𝑐/𝑈) to determine how the leading edge radius of curvature affects leading edge separation. The understanding of leading edge separation and its behaviors is critical to predicting the transient lift profile of an airfoil. The separation is therefore also critical...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: James A. Liburdy Oscillating foil energy harvesters are analyzed at optimal reduced

  • Mechanically Enhanced and Optically Compatible Hydrogels for Particle Image Velocimetry in Porous Flow

    Creator:
    Cornwell-Arquitt, Luke
    Abstract:
    Hydrogels have been attractive for use as a medium in porous flow studies, but have always been limited in this role because of their poor mechanical properties. This project analyzes and tests two recently developed hydrogels, poly(methacrylamide-co-methacrylic acid) (PMM), and a heat-treated long chain PVA hydrogel. Particle image velocimetry (PIV)...
    Resource Type:
    Honors College Thesis
    Full Text:
    Particle Image Velocimetry in Porous Flow by Luke Cornwell-Arquitt A THESIS submitted to Oregon