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Filtering by: Creator Zheng, Joshua Y. Remove constraint Creator: Zheng, Joshua Y. Degree Field Mechanical Engineering Remove constraint Degree Field: Mechanical Engineering

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  • Thermal and Aerodynamic Effects of Surface Roughness Patterns on Additive Manufactured Heat Sinks

    Creator:
    Lundeen, Samuel L.
    Abstract:
    Breakthroughs in heat sink design are now limited by conventional manufacturing techniques which can only produce basic fin shapes with homogenous surface structuring. Additive Manufacturing (AM) is a potential disruptive technology for heat sink design and other convective heat transfer solutions, as surface properties can be directionally varied to maximize...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: __________________________________________________________________ Joshua Gess

  • Development of a Boiling Surface Effectiveness Parameter by Modeling and Quantifying the Net Coolant Flow Rate

    Creator:
    Harrison, Matt
    Abstract:
    Boiling dynamics and related heat transfer mechanisms have been widely studied for several decades. During that time, incredible progress has been made on quantifying bubble departure phenomena including growth rate, departure frequency, associated natural and forced convection, and radiation additions to the overall heat transfer rate. With this, the thermal...
    Resource Type:
    Dissertation
    Full Text:
    similar to that of a fin Joshua L. Gess effectiveness parameter as this quantifies the utility

  • Development of Two-Color Laser Induced Fluorescence Fluid Temperature Imaging for Free Convection Heat Transfer Applications

    Creator:
    McAfee, Rachel C.
    Abstract:
    The development of a continuous and reliable cooling method for computer chips is an evolving subject requiring continuous research in both computer science and thermal management. Two-dye laser induced fluorescence (LIF) provides a minimally invasive way to investigate electronics cooling fluid behavior. Dielectric fluids are of particular interest as they...
    Resource Type:
    Honors College Thesis
    Full Text:
    :_____________________________________________________ Joshua Gess The development of a continuous and reliable cooling method for computer chips

  • Tracking of Melt Pool Motion Using Numerical Analysis of Laser Powder Bed Fusion

    Creator:
    Cox, Bryce
    Abstract:
    Laser Powder Bed Fusion (LPBF) is a process commonly used to create additively manufactured metal parts. The flexibility and complexity allowed by the LPBF process provides opportunity for significant advancement in multiple industries as parts can be customized in shape and function for specific needs. These benefits can be compounded...
    Resource Type:
    Dissertation
    Full Text:
    . Abstract approved: ______________________________________________________ Joshua L. Gess Laser

  • Two-Color Laser Induced Fluorescence Imaging of Fluid Temperature for Free Convection and Vapor Condensation

    Creator:
    McAfee, Rachel
    Abstract:
    The development of a continuous and reliable cooling method for computer chips is an evolving subject requiring continuous research in both computer science and thermal management. Two-color laser induced fluorescence (LIF) provides a non-invasive way to investigate electronics cooling fluid behavior. Dielectric fluids are of particular interest as they allow...
    Resource Type:
    Masters Thesis
    Full Text:
    Joshua L. Gess The development of a continuous and reliable cooling method for computer chips

  • A Computational Framework for Resilience-Informed Design

    Creator:
    Hulse, Daniel E.
    Abstract:
    It is desirable for complex engineered systems to perform missions efficiently and economically, even when these missions' complex, variable, long-term operational profiles make it likely for hazards to arise. It is thus important to design these systems to be resilient so that they will actively prevent and recover from hazards...
    Resource Type:
    Dissertation
    Full Text:
    Computational Framework for Resilience-Informed Design Abstract approved: Irem Y. Tumer Christopher Hoyle It

  • Bio-Inspired Design of Vehicles that Operate in Complex Environments

    Creator:
    Jackson, Danielle M.
    Abstract:
    This dissertation focuses on defining underlying mechanisms to enable the bio-inspired design of aerodynamic and/or hydrodynamic vehicles that operate within complex environments. This dissertation introduces four overarching research gaps found in current bio-inspired design research and four corresponding approach questions that guide the framework of the presented research. This research...
    Resource Type:
    Dissertation

  • Wing Flutter Suppression via Distributed Electric Propulsion

    Creator:
    Bamberger, Joshua
    Abstract:
    This research aims to demonstrate the viability of actively controlled distributed-electric propulsion as a method to postpone flutter in high aspect-ratio elastic wings. A semi-wing on a spring mount with two propellers powered by electric motors, mounted at alternate pitch angles relative to the chord line, was used as the...
    Resource Type:
    Honors College Thesis
    Full Text:
    Joshua Bamberger A THESIS submitted to Oregon State University Honors

  • Q-Network Policy Selection For Multiagent Learning

    Creator:
    Cook, Joshua
    Abstract:
    Controllers for robotic systems can be complex and difficult to write by hand. Learning offers an approach to improve a controller through direct feedback. Learning is not trivial, as the feedback does not tell the agent how to improve, only how well its current actions solve the given task. Learning...
    Resource Type:
    Honors College Thesis
    Full Text:
    Q-Network Policy Selection For Multiagent Learning By Joshua

  • Non-Isotropic Fiber Reinforced Elastic Membranes for Micro Aerial Vehicle Wings

    Creator:
    Wilcox, Joshua Robert
    Abstract:
    Micro air vehicles (MAV's) and small unmanned aerial vehicles (SUAV) are remotely piloted or autonomous aircraft with a take-off mass range between 50 g and few kilograms. These vehicles, as well as natural fliers such as bats and insects, utilize a variety of elastic wing structures including thin membranes. Over...
    Resource Type:
    Masters Thesis
    Full Text:
    Aerial Vehicles AN ABSTRACT OF THE THESIS OF Joshua Robert Wilcox for the degree