Index Catalog // ScholarsArchive@OSU

Development of acoustic emissions testing procedures applicable to conventionally reinforced concrete deck girder bridges subjected to diagonal tension cracking

Creator:: Lovejoy, Steven C.
Abstract:: A need exists to develop a non-destructive testing technique that can identify the formation and propagation of diagonal tension cracks in conventionally steel reinforced concrete deck girder (RCDG) highway bridges in the State of Oregon. Such a technique could be included into a structural health monitoring (SHM) system installed on...
Resource Type:: Dissertation
Full Text:: varying V/M ratios…… 59 3.5.3.3 Loading and reloading with identical loading sequences

Investigating arc behavior in a DC vacuum arc remelting furnace using magnetic flux density measurements

Creator:: Woodside, Rigel
Abstract:: The behavior of a metal vapor plasma arc in a vacuum arc remelting (VAR) furnace is believed to contribute to the formation of defects in reactive metal and super-alloy ingots. Industry standard instrumentation, which includes electric current and voltage measurements, can asses the stability of an arc but cannot predict...
Resource Type:: Masters Thesis
Full Text:: in the 1980s. It was found that arcs could move toward the edges at speeds up to 900 m/s.17

Applying hierarchical and adaptive control to coordinating simple robots

Creator:: Knudson, Matthew D.
Abstract:: Coordinating multiple robots to achieve a complex task requires solving two distinct control problems: the high-level control problem of ensuring that each robot aims to perform a useful task (e.g., coordination) and the low-level control problem of ensuring that each robot actually performs the correct actions to achieve its task...
Resource Type:: Masters Thesis

A technique for spatially resolved wall temperature measurements in microchannel heat sinks using infrared thermography

Creator:: Krebs, Daniel P.
Abstract:: A non-intrusive measurement technique for direct quantitative thermal visualization of channel wall temperatures in two phase microchannel flows using infrared thermography (IRT) is presented. Specifically, the measurement of top channel wall temperatures in a fractal-like branching microchannel silicon heat sink during flow boiling is demonstrated and thoroughly documented. Obtaining quantitative...
Resource Type:: Masters Thesis
Full Text:: FLYLEAF AN ABSTRACT OF THE THESIS OF Daniel P

Detection and analysis of separated flow induced vortical structures

Creator:: Snider, Stephen David Louis
Abstract:: Flow separation is an important phenomenon in fluid dynamics because of the effect it has on lift and drag on immersed bodies. Areas of swirl within a separated flow region may have a distinct effect on the surface forces, modifying the lift and drag characteristics. A correlation between the passage...
Resource Type:: Masters Thesis
Full Text:: supercomputers and Fortran. Thank you to Dr. Jim Liburdy, Dr. Eugene Zhang, Daniel Morse, and Guoning Chen for

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:: OF Lee M. Edward for the degree of Master of Science in Mechanical Engineering presented on June

Experimental study of two-phase gas-liquid flow in a microscale fractal-like branching flow network

Creator:: Kwak, Younghoon
Abstract:: Two-phase gas-liquid flows in microscale fractal-like branching channel flow networks were experimentally studied to assess the validity of existing void fraction correlations and flow regimes based on superficial gas and liquid velocities. Void fractions were assessed using two different methods. First, void fraction data were acquired using a High-Speed-High-Resolution (HSHR)...
Resource Type:: Dissertation
Full Text:: superficial air and water velocities through the same branch level between 0.007 m/s and 1.8 m/s and between

A study of adiabatic and diabatic flow boiling in parallel microchannels and fractal-like branching microchannels

Creator:: Daniels, Brian J.
Abstract:: A one-dimensional numerical model has been developed to study diabatic and adiabatic flow boiling in microchannels. This model accounts for developing flow effects and variable property effects. The model uses correlations for void fraction and two-phase multipliers found in the literature. The model has been used to study the performance...
Resource Type:: Dissertation
Full Text:: channel width of 100 μm. The channel pressure drops varied from 20 kPa to 90 kPa. These results were

Experiments on a low aspect ratio wing at low Reynolds numbers

Creator:: Morse, Daniel R.
Abstract:: At the start of the 21st century much of the focus of aircraft design has been turned to unmanned aerial vehicles (UAVs) which generally operate at much lower speeds in higher risk areas than manned aircraft. One subset of UAVs are Micro Air Vehicles (MAVs) which usually are no larger...
Resource Type:: Dissertation
Full Text:: THE DISSERTATION OF Daniel R. Morse for the degree of Doctor of Philosophy in Mechanical Engineering

Mechanical engineering design across cultures : a method of designing for cultures

Creator:: Van Bossuyt, Douglas L.
Abstract:: Mechanical design is often based on formal methodologies such as Quality Function Deployment. Techniques to quantitatively account for attractability, sensory perception, and affective design have been successfully incorporated into these methods and are receiving growing acceptance across many industries. Although the adoption of these methods marks a large improvement for...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Development of acoustic emissions testing procedures applicable to conventionally reinforced concrete deck girder bridges subjected to diagonal tension cracking

Investigating arc behavior in a DC vacuum arc remelting furnace using magnetic flux density measurements

Applying hierarchical and adaptive control to coordinating simple robots

A technique for spatially resolved wall temperature measurements in microchannel heat sinks using infrared thermography

Detection and analysis of separated flow induced vortical structures

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

Experimental study of two-phase gas-liquid flow in a microscale fractal-like branching flow network

A study of adiabatic and diabatic flow boiling in parallel microchannels and fractal-like branching microchannels

Experiments on a low aspect ratio wing at low Reynolds numbers

Mechanical engineering design across cultures : a method of designing for cultures

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