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University of Tennessee, Knoxville

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Articles 1 - 30 of 277

Full-Text Articles in Mechanical Engineering

High Resolution Validation Of Next Generation Turbulent Flow Models Using Neutron Beams, Laser Fluorescence, And Cryogenic Helium, Landen G Mcdonald May 2019

High Resolution Validation Of Next Generation Turbulent Flow Models Using Neutron Beams, Laser Fluorescence, And Cryogenic Helium, Landen G Mcdonald

EURēCA: Exhibition of Undergraduate Research and Creative Achievement

Turbulent fluid flow is an incredibly unpredictable subject that continues to confound scientists and engineers. All of the empirical data that has been the basis of conventional turbulent computational fluid dynamics (CFD) models for decades only extends to roughly the equivalent turbulence created when Michael Phelps swims in a pool. The problem is that this data is then extrapolated out many orders of magnitude in order to design cruise ships, airplanes, and rockets which operate in significantly more turbulent flow regimes. This creates an incredible degree of uncertainty in the design process that demands over-engineering and increased expenditures.

The development ...


Torch Mounted Wire Nipper, Steven D. Patrick, Matt Montgomery, Ben Rouse, Garrett D. Foust May 2019

Torch Mounted Wire Nipper, Steven D. Patrick, Matt Montgomery, Ben Rouse, Garrett D. Foust

Chancellor’s Honors Program Projects

No abstract provided.


Final Design Report For The Bioburden Pre-Cleaning Device And Dr. Mark Rasnake At The University Of Tennessee Medical Center, Katherine Elizabeth Stiles, Megan Pitz, Kayla Franklin, Simran Dayal, Austin Bullock May 2019

Final Design Report For The Bioburden Pre-Cleaning Device And Dr. Mark Rasnake At The University Of Tennessee Medical Center, Katherine Elizabeth Stiles, Megan Pitz, Kayla Franklin, Simran Dayal, Austin Bullock

Chancellor’s Honors Program Projects

No abstract provided.


The Comparison Of Verbalized Feedback In Human To Computer Interfacing Versus Human To Human Interaction, Kea Francis Feb 2019

The Comparison Of Verbalized Feedback In Human To Computer Interfacing Versus Human To Human Interaction, Kea Francis

EURēCA: Exhibition of Undergraduate Research and Creative Achievement

The project evaluates response to social robots for purposeful tasks. The study uses a social robot, Rapiro, along with a smartphone that serves as a visual interface for the robot system. My role was to design a program on a Raspberry Pi that allows simultaneous control of Rapiro’s actions and a response from a phone application. The phone app is downloaded to an Android phone and designed using MIT App Inventor software. This allows pre-programmed and real-time control of the robot. The user inputs what they want the robot to say through the terminal of the Raspberry Pi. Through ...


Muse 1: Interactive Water Table, Sarah R. Higginbotham Dec 2018

Muse 1: Interactive Water Table, Sarah R. Higginbotham

Chancellor’s Honors Program Projects

No abstract provided.


Finisher Alignment Project, Thomas Frye Dec 2018

Finisher Alignment Project, Thomas Frye

Chancellor’s Honors Program Projects

No abstract provided.


Improving Sheet Molding Compound, Zebulon G. Mcreynolds Sep 2018

Improving Sheet Molding Compound, Zebulon G. Mcreynolds

EURēCA: Exhibition of Undergraduate Research and Creative Achievement

Zebulon McReynolds

An important attribute of the compression molding process is the requirement of (Sheet Molding Compound) SMC. The fibers, commonly glass or carbon fibers, are impregnated with thermoset resin and collected in continuous form on a conveyor belt. The SMC charge is rolled between rollers to wet out the fibers with resin. The SMC charge is then compression molded to a desired part reflecting the designed mold. The part could be an automotive part or any other industrial applicable part. Compression molding with fibers and polymers is the largest component of most of the manufacturing industries in the world ...


Ut Football Automated Practice Target, Mary Elizabeth Iannuzzi, Lee Fullam, Lindsay Little, Julia Meyer May 2018

Ut Football Automated Practice Target, Mary Elizabeth Iannuzzi, Lee Fullam, Lindsay Little, Julia Meyer

Chancellor’s Honors Program Projects

No abstract provided.


Dynamic In Vivo Skeletal Feature Tracking Via Fluoroscopy Using A Human Gait Model, William Patrick Anderson Dec 2017

Dynamic In Vivo Skeletal Feature Tracking Via Fluoroscopy Using A Human Gait Model, William Patrick Anderson

Doctoral Dissertations

The Tracking Fluoroscope System II, a mobile robotic fluoroscopy platform, developed and built at the University of Tennessee, Knoxville, presently employs a pattern matching algorithm in order to identify and track a marker placed upon a subject’s knee joint of interest. The purpose of this research is to generate a new tracking algorithm based around the human gait cycle for prediction and improving the overall accuracy of joint tracking.

This research centers around processing the acquired x-ray images of the desired knee joint obtained during standard clinical operation in order to identify and track directly through the acquired image ...


Sound-Proof, Fire Resistant, Leak-Free And Super-Insulated Hvac Ducts, James Fitzsimmons Ii, Ahmed Alyousef, Kyle Dirksen, Nathan Ware, William Miller Dec 2017

Sound-Proof, Fire Resistant, Leak-Free And Super-Insulated Hvac Ducts, James Fitzsimmons Ii, Ahmed Alyousef, Kyle Dirksen, Nathan Ware, William Miller

Chancellor’s Honors Program Projects

No abstract provided.


Sensitivity Analysis For Best-Estimate Thermal Models Of Vertical Dry Cask Storage Systems, Remy R. Devoe, Kevin R. Robb, Steven Skutnik Aug 2017

Sensitivity Analysis For Best-Estimate Thermal Models Of Vertical Dry Cask Storage Systems, Remy R. Devoe, Kevin R. Robb, Steven Skutnik

Faculty Publications and Other Works -- Nuclear Engineering

Loading requirements for dry cask storage of spent nuclear fuel are driven primarily by decay heat capacity limitations, which themselves are determined through recommended limits on peak cladding temperature within the cask. This study examines the relative sensitivity of peak material temperatures within the cask to parameters that influence both the stored fuel residual decay heat as well as heat removal mechanisms. These parameters include the detailed reactor operating history parameters (e.g., soluble boron concentrations and the presence of burnable poisons) as well as factors that influence heat removal, including non-dominant processes (such as conduction from the fuel basket ...


Correlating Long-Term Lithium Ion Battery Performance With Solid Electrolyte Interphase (Sei) Layer Properties, Seong Jin An Aug 2017

Correlating Long-Term Lithium Ion Battery Performance With Solid Electrolyte Interphase (Sei) Layer Properties, Seong Jin An

Doctoral Dissertations

This study was conducted to understand effects of some of key factors (i.e., anode surface properties, formation cycling conditions, and electrolyte conditions) on solid electrolyte interphase (SEI) formation in lithium ion batteries (LIBs) and the battery cycle life. The SEI layer passivates electrode surfaces and prevents electron transfer and electrolyte diffusion through it while allowing lithium ion diffusion, which is essential for stable reversible capacities. It also influences initial capacity loss, self-discharge, cycle life, rate capability and safety. Thus, SEI layer formation and electrochemical stability are primary topics in LIB development. This research involves experiments and discussions on key ...


Value Of Flow Measurement Accuracy In Hydropower Plants With Short Converging Intakes, Mark Herbert Christian Aug 2017

Value Of Flow Measurement Accuracy In Hydropower Plants With Short Converging Intakes, Mark Herbert Christian

Doctoral Dissertations

This report documents research undertaken to determine the value of flow measurement accuracy in hydropower plants with short converging intakes. The motivation was to provide a suite of tools and best practices to streamline flow measurement sensor modeling in any type of hydropower plant. The Lower Granite Lock and Dam hydroplant was leveraged in development of the analysis tool. Computational fluid dynamics (CFD) models of Lower Granite Unit 4 provided necessary information about the hydraulic structures distribution through the unit. Two different CFD models were created. The first was done using the as-built plans; the second was created through modifications ...


Design Of A Robotic Instrument Manipulator For Endoscopic Deployment, Ryan Ponten Aug 2017

Design Of A Robotic Instrument Manipulator For Endoscopic Deployment, Ryan Ponten

Masters Theses

This thesis describes the initial design process for an application of continuum robotics to endoscopic surgical procedures, specifically dissection of the colon. We first introduce the long-term vision for a benchtop dual-instrument endoscopic system with intuitive haptic controllers and then narrow our focus to the design and testing of the instrument manipulator itself, which must be actuated through the long, winding channel of a standard colonoscope.

Based on design requirements for a target procedure, we analyze simulations of two types of continuum robots using recently established kinematic and mechanic modeling approaches: the concentric-tube robot (CTR) and the concentric agonist-antagonist robot ...


Innovation Of Driving Gear Train System For Developer Unit Of Lexmark Home Printers, Jay A. Crist, Sarah Gore, Kun Xie, Michael Mixoon Aug 2017

Innovation Of Driving Gear Train System For Developer Unit Of Lexmark Home Printers, Jay A. Crist, Sarah Gore, Kun Xie, Michael Mixoon

Chancellor’s Honors Program Projects

No abstract provided.


Modeling, Analysis, Force Sensing And Control Of Continuum Robots For Minimally Invasive Surgery, Caroline Bryson Black May 2017

Modeling, Analysis, Force Sensing And Control Of Continuum Robots For Minimally Invasive Surgery, Caroline Bryson Black

Doctoral Dissertations

This dissertation describes design, modeling and application of continuum robotics for surgical applications, specifically parallel continuum robots (PCRs) and concentric tube manipulators (CTMs). The introduction of robotics into surgical applications has allowed for a greater degree of precision, less invasive access to more remote surgical sites, and user-intuitive interfaces with enhanced vision systems. The most recent developments have been in the space of continuum robots, whose exible structure create an inherent safety factor when in contact with fragile tissues. The design challenges that exist involve balancing size and strength of the manipulators, controlling the manipulators over long transmission pathways, and ...


Improving Predictive Capabilities Of Classical Cascade Theory For Nonproliferation Analysis, David Allen Vermillion May 2017

Improving Predictive Capabilities Of Classical Cascade Theory For Nonproliferation Analysis, David Allen Vermillion

Doctoral Dissertations

Uranium enrichment finds a direct and indispensable function in both peaceful and nonpeaceful nuclear applications. Today, over 99% of enriched uranium is produced by gas centrifuge technology. With the international dissemination of the Zippe archetypal design in 1960 followed by the widespread illicit centrifuge trafficking efforts of the A.Q. Khan network, traditional barriers to enrichment technologies are no longer as effective as they once were. Consequently, gas centrifuge technology is now regarded as a high-priority nuclear proliferation threat, and the international nonproliferation community seeks new avenues to effectively and efficiently respond to this emergent threat.

Effective response first requires ...


Computational Thermal-Hydraulics Modeling Of Twisted Tape Enabled High Heat Flux Components, Emily Buckman Clark May 2017

Computational Thermal-Hydraulics Modeling Of Twisted Tape Enabled High Heat Flux Components, Emily Buckman Clark

Doctoral Dissertations

The goal of this work was to perform a computational investigation into the thermalhydraulic performance of water-cooled, twisted tape enabled high heat flux components at fusion relevant conditions. Fusion energy is a promising option for future clean energy generation, but the community must overcome significant scientific and engineering challenges before meeting the goal of electricity generation. One such challenge is the high heat flux thermal management of components in fusion and plasma physics experiments. Plasma facing components in the magnetic confinement devices, such as ITER or W7-X, will be subjected to extreme heat loads on the order of 10-20 MW ...


Ut Lineman Chute, Benjamin D. Jacob, Logan T. Sissom, Stephen E. Brennan, Thomas B. Mcdavid May 2017

Ut Lineman Chute, Benjamin D. Jacob, Logan T. Sissom, Stephen E. Brennan, Thomas B. Mcdavid

Chancellor’s Honors Program Projects

No abstract provided.


Lab Toner Vacuum Cleaner Caddy, Treavor C. Johnson Mr., Robert K. Davis Mr., Spencer K. Sanders Mr., Erin M. Miller Ms. May 2017

Lab Toner Vacuum Cleaner Caddy, Treavor C. Johnson Mr., Robert K. Davis Mr., Spencer K. Sanders Mr., Erin M. Miller Ms.

Chancellor’s Honors Program Projects

No abstract provided.


Min Kao Autonomous Robot Tour Guide, Albert J. Toth, Sunay G. Bhat, Christopher A. Treadway, Ammar S. Abdelwahed, Samuel C. Leach May 2017

Min Kao Autonomous Robot Tour Guide, Albert J. Toth, Sunay G. Bhat, Christopher A. Treadway, Ammar S. Abdelwahed, Samuel C. Leach

Chancellor’s Honors Program Projects

No abstract provided.


Semi-Autonomous Golf Cart, Daniel T. Garza, Richard S. Emeott, Matthew E. May, Valerie A. Cherry, Brooke Davidson May 2017

Semi-Autonomous Golf Cart, Daniel T. Garza, Richard S. Emeott, Matthew E. May, Valerie A. Cherry, Brooke Davidson

Chancellor’s Honors Program Projects

No abstract provided.


Silicon Carbide Materials Properties Selection For Mechanical Seal Faces, William Charles Hoskins May 2017

Silicon Carbide Materials Properties Selection For Mechanical Seal Faces, William Charles Hoskins

Chancellor’s Honors Program Projects

No abstract provided.


Nanoscale Investigations Of Thermal And Momentum Transport In Graphene – Water Systems, Drew Champion Marable May 2017

Nanoscale Investigations Of Thermal And Momentum Transport In Graphene – Water Systems, Drew Champion Marable

Masters Theses

Demand for miniaturized electronic devices has given rise to new challenges in thermal management. Integration with graphene, a two-dimensional (2D) material with excellent thermal properties, allows for further reduced sizes and combats thermal management issues within novel devices. Moreover, due to its wide availability and adequate thermal properties, liquid water is commonly used within traditional thermal systems to enhance cooling performance; as such, water is expected to yield similar performance in smaller-scale applications. However, at reduced sizes descending to the nanoscale realm, system behaviors deviate from traditional macroscale-based theory as interfacial effects become amplified. Employing insight provided by molecular dynamics ...


Advanced Catalyst Systems Senior Design Project, Megan Peck May 2017

Advanced Catalyst Systems Senior Design Project, Megan Peck

Chancellor’s Honors Program Projects

No abstract provided.


Turbine Engine Rotor Blade Damage Detection Through The Analysis Of Vibration Of Stationary Components, Jon Rylan Cox Dec 2016

Turbine Engine Rotor Blade Damage Detection Through The Analysis Of Vibration Of Stationary Components, Jon Rylan Cox

Doctoral Dissertations

Rotor blade fault detection and health monitoring systems are crucial for gas turbine engine testing and evaluation. The most commonly used techniques involve monitoring blades directly using strain gages, or drilling optical access holes in the engine casing for non-contact probes to monitor blade deflection and vibration. In this work, less intrusive, indirect techniques for rotor blade fault detection are developed, based on the hypotheses that the vibratory response of stationary components excited by the rotor blade dynamic pressure pulse can be used to detect the presence, location, and severity of rotor blade damage and changes in rotor blade natural ...


Impedance-Resolved Performance And Durability In Redox Flow Batteries, Alan Michael Pezeshki Dec 2016

Impedance-Resolved Performance And Durability In Redox Flow Batteries, Alan Michael Pezeshki

Doctoral Dissertations

The realization of redox flow batteries (RFBs) as a grid-scale energy solution depends on improving the performance and lifetime of the technology to decrease the high capital costs. The electrodes are a key component in the RFB; performance enhancement is often achieved through chemical or thermal treatments of commercially available porous carbon materials.

This dissertation uses impedance spectroscopy-based methods to gain insight into performance and durability in RFBs, enabling intelligent cell design. Initial work focused on understanding the impact of improved electrode and membrane properties on system performance. An accelerated stress test was then developed that can be used to ...


Investigation Of Localized Performance And Gas Evolution In All-Vanadium Redox Flow Batteries Via In-Situ Distributed Diagnostic Techniques, Jason Thomas Clement Dec 2016

Investigation Of Localized Performance And Gas Evolution In All-Vanadium Redox Flow Batteries Via In-Situ Distributed Diagnostic Techniques, Jason Thomas Clement

Doctoral Dissertations

All-vanadium redox flow batteries (VRFBs) are an emerging grid-scale energy storage technology; however, enhancements in terms of performance, efficiency, durability, and cost are required before it can become commercially viable. These improvements are achievable through the development of advanced materials, superior architecture, and ultimately a deeper fundamental understanding of the influence of various phenomena and operational parameters on cell performance. There currently are a lack of in-situ experimental diagnostic techniques which can help in achieving this fundamental understanding.

Two separate distributed diagnostic techniques were developed in this work: in-plane current distribution, and neutron radiography. Localized current distribution measurements can identify ...


Parametric Instability And Vibration Suppression Of Planetary Gear Transmissions Supported On Boundary Struts, Peng Guan Dec 2016

Parametric Instability And Vibration Suppression Of Planetary Gear Transmissions Supported On Boundary Struts, Peng Guan

Doctoral Dissertations

This dissertation explores the effects of discrete boundary strut properties on stability and vibration of the planetary gear transmission (PGT) driveline systems. Also, a robust output feedback control law is developed to actively control the PGT system vibrations. To better obtain boundary strut properties, a light-weight boundary strut design was developed for two popular boundary strut configurations by considering yield stress, buckling, and local buckling constraints. To facilitate analysis and development of the active control law, a comprehensive analytical PGT driveline system with elastic ring model, including gyroscopic effect and rotating-frame damping, is developed. The equation of motion of the ...


Deterministic Neutron Transport And Multiphysics Experimental Safety Analyses At The High Flux Isotope Reactor, Christopher James Hurt Dec 2016

Deterministic Neutron Transport And Multiphysics Experimental Safety Analyses At The High Flux Isotope Reactor, Christopher James Hurt

Doctoral Dissertations

The computational ability to accurately predict the conditions in an experiment under irradiation is a valuable tool in the operation of a research reactor whose scientific mission includes isotope production, materials irradiation, and neutron activation analysis. Understanding of different governing physics is required to ascertain satisfactory conditions within the experiment: the neutron transport behavior throughout the reactor and the coupled behavior of heat transfer, structural mechanics and fluid flow. Computational methods and tools were developed for robust numerical analysis of experiment behavior at the Oak Ridge National Laboratory (ORNL) High Flux Isotope Reactor (HFIR), including fully-coupled thermo-mechanics in three plutonium-238 ...