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Filtering by: Creator Upington, Deborah A. Remove constraint Creator: Upington, Deborah A. Committee Member Pence, Deborah V. Remove constraint Committee Member: Pence, Deborah V.

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  • 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

  • Characterization of flow boiling in a fractal–like branching microchannel network

    Creator:
    Edward, Lee M.
    Abstract:
    Based on experimental investigations the present study evaluates flow instability and void fraction in a fractal-like branching microchannel network with rectangular cross-section. The hydraulic diameter of the channels ranged from 308μm at the inlet to 143μm at the outlet. The flow network used is characterized by set branching ratios for...
    Resource Type:
    Masters Thesis
    Full Text:
    6, 2008. Title: Characterization of Flow Boiling in a Fractal-Like Branching Microchannel Network

  • Investigations into the effects of a vibrating meniscus on the characteristics of drop formation

    Creator:
    Lewis, Kevin T.
    Abstract:
    As drop-on-demand (DOD) applications continue to gain ground in desktop inkjet-printing, 3D printing, fluid mixing, and other areas the demand for higher frequency operations are beginning to push against the current physical boundaries in DOD technology. The current research is exploring the possibility of controlling drop volume and velocity at...
    Resource Type:
    Masters Thesis
    Full Text:
    : Investigations into the Effects of a Vibrating Meniscus on the Characteristics of Drop Formation Abstract

  • 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:
    The application of a flapping foil with prescribed trailing edge motion to energy harvesting in a low

  • Modeling convective boiling flow with in-situ local vapor extraction

    Creator:
    Salakij, Saran
    Abstract:
    The pressure drop of convective boiling flow may be reduced by extracting vapor locally since the entire generated vapor does not have to travel through the entire channel length. In this study, the theoretical model was developed to simulate a convective boiling flow through a fractal-like branching microchannel network with...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: ________________________________________________ James A. Liburdy The pressure drop of

  • Modeling in-situ vapor extraction during flow boiling in microscale channel

    Creator:
    Salakij, Saran
    Abstract:
    In-situ vapor extraction is performed by applying a pressure differential across a hydrophobic porous membrane that forms a wall of the channel as a means of reducing the local quality of flow boiling within the channel. As the local quality is reduced, the heat transfer capability can be improve while...
    Resource Type:
    Dissertation
    Full Text:
    gratitude to Dr. James A. Liburdy, my advisor, and Dr. Deborah V. Pence, my committee member, for the

  • Numerical study of droplet formation with nozzle dynamics and multiple droplet impingement

    Creator:
    Sangplung, Saangrut
    Abstract:
    Droplet formation from a flexible nozzle plate driven by a prescribed-waveform excitation of a piezoelectric is numerically investigated using a computational fluid dynamics (CFD) model with the VOF method. The droplet generator with a flexible nozzle plate, which is free to vibrate due to the pressure acting on the plate,...
    Resource Type:
    Dissertation
    Full Text:
    Multiple Droplet Impingement Abstract approved: James A. Liburdy Droplet formation

  • Lift and drag characteristics of flexible pitching and heaving wings

    Creator:
    Rushen, Jesse
    Abstract:
    There is a pressing need for Micro Air Vehicles (MAV) that are light, powerful, and efficient to perform military reconnaissance missions and search and rescue operations. These MAVs have length scales on the order of 10 cm, where traditional steady flight wing designs perform poorly. An alternative flight mechanism is...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ James A. Liburdy There is a pressing need for Micro Air Vehicles (MAV) that are light

  • Study of Energy Harvesting Performance of Oscillating Airfoils using a Discrete Vortex Model

    Creator:
    Kamrani Fard, Kiana
    Abstract:
    The energy harvesting performance of oscillating airfoils is studied using a discrete vortex model (DVM) with a leading-edge separation criterion. The airfoil undergoes a combined sinusoidal heaving and pitching motion at reduced frequencies of k = 0.06 − 0.16, with heaving amplitude of h0 = 0.5c, and pitching amplitude of...
    Resource Type:
    Dissertation
    Full Text:
    . Title: Study of Energy Harvesting Performance of Oscillating Airfoils using a Discrete Vortex Model

  • Analysis of spillway hydrodynamics for total dissolved gas prediction downstream of hydropower projects with free, plunging spillway jets

    Creator:
    Germann, Nathan A.
    Abstract:
    During spring and early summer hydropower projects are often forced to spill water through their spillways due to increased river flows of the runoff season. Flows which are directed through spillways--instead of through turbines--contain a substantial amount of energy. Stemming from the high energy content, spillway flows entrain air at...
    Resource Type:
    Masters Thesis
    Full Text:
    Nathan A. Germann for the degree of Master of Science in Mechanical Engineering presented on October 2