Index Catalog // ScholarsArchive@OSU

Heat Treatment of Carbon Steel

Creator:: Taylor, William Everett
Abstract:: All carbon steel that is used in tools, springs, and machine parts where tempering is necessary undergoes three distinct heat treatments: first, heating for forging; second, heating for hardening; and third, heating for tempering.
Resource Type:: Undergraduate Thesis
Full Text:: : ç) (j QJ I fL/f L: ©©ft©R ©L2\UE E©E1 E1UEJ© /2 II /0 8 8 ? 6 S 4 3 ¿) Le/iqf/i O1C.Sp//t7

Analysis, testing, and redesign of an environmental control system for an engine dynamometer

Creator:: Morris, Taylor H.
Abstract:: This project analyzes, tests, and redesigns an environmental control system for Global Formula Racing’s (GFR) dynamometer. It seeks to develop a working system to test GFR’s car engine under air conditions similar to those faced during competition. A model is developed to predict the performance of the environmental control system,...
Resource Type:: Honors College Thesis
Full Text:: Control System for an Engine Dynamometer by Taylor H. Morris A THESIS

Mechanical linkage design for haptic rehabilitation and development of fine motor skills

Creator:: Streng, B. Taylor
Abstract:: Thousands of children and adults suffer from fine motor skill deficits due to developmental disabilities or brain trauma. In order to acquire or reclaim these precision motor movements, occupational therapists work closely with each patient to develop the muscle memory required for completing tasks such as handwriting or drawing. Although...
Resource Type:: Masters Thesis
Full Text:: . © Copyright by B. Taylor Streng December 11, 2008 All Rights Reserved

Using Digital Human Modeling to Evaluate and Improve Car Pillar Design: A Proof of Concept and Design of Experiments

Creator:: Mellon, Taylor R. P.
Abstract:: Considering human factors in early engineering design stages can improve expensive late stage processes, facilitate user safety, improve product quality and help reduce the need for physical prototyping. Currently, car pillar design (the vertical pillars between windows which connect the roof and car body) provide safety for the passengers in...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Taylor Mellon for the degree of Master of

Technological Improvements in Ligation and Suturing Techniques: A Comparison in the Material Strength of Ligating Clips and Suturing Devices

Creator:: Robertson, Bria L.
Abstract:: Treatment of extrahepatic portosystemic shunts provides many options, including cellophane banding. These cellophane bands are secured with a ligation clip. Weck® offers two forms of these: the stainless steel Hemoclip, and the polymer Hem-o-lok. This in vitro study compares the mechanical strength of these two of types of clips by...
Resource Type:: Honors College Thesis
Full Text:: Suturing Devices. Abstract approved:_____________________________________________________ Jamie J

A photoelastic stress analysis of a beam under shear and compressive loads

Creator:: Bitting, Kenneth Robert
Abstract:: The determination of failure is complicated when a structural element is subjected to combined rather than simple stresses. This is especially true when the principle of superposition does not apply. For such cases, tests of the element under the expected loads are required to determine its failure criteria. In this...
Resource Type:: Masters Thesis
Full Text:: ANALYSIS OF A BEAM UNDER SHEAR AND COMPRESSIVE LOADS", Redacted for Privacy Abstract approved: Dii. H/-j

A rapid method for determinations of nitrogen oxides in engine exhaust gas

Creator:: Johnson, Douglas Edward
Resource Type:: Masters Thesis
Full Text:: 1951 by A. J. Haagen-.3mit of the California Institute of rechnology, 'the hydro-. carbons and

Polycarbonate as a photoplastic stress freezing material

Creator:: Broderick, John Justin
Abstract:: Dead weight creep tests were conducted on polycarbonate in order to determine if it is a linear viscoelastic material; or if it is not, then to determine the feasibility of photoplastic stress freezing. Secondary objectives were: the determination of the parameters in the creep compliance of a four element viscoelastic...
Resource Type:: Masters Thesis
Full Text:: June 8, 1970 Typed by Barbara Eby for John Justin Broderick ACKNOWLEDGMENT I wish to thank Dr. H

A thermodynamic study of energy absorbed by a motored four cycle engine with positive exhaust pressure as applied to commercial exhaust brakes

Creator:: Thompson, Ralph Allen
Resource Type:: Masters Thesis
Full Text:: grateful to w. H. Paul, Professor ot Automotive Engineering and J. G. Mingle, Assistant Professor ot

Power performance of planing boats with the effect of propeller selection and propeller guard design

Creator:: Ladd, Daniel M.
Abstract:: One of the unique problems associated with salmon gillnet fishing is of preventing the fouling of the boat's propeller in the net and associated fishing gear. Presently, the solution to this problem has been the addition of a basket type propeller guard which may produce a drag increase of 50...
Resource Type:: Masters Thesis
Full Text:: approved: Redacted for r J. XillyKinney One of the unique problems associated with salmon gillnet fish

Optimization & Qualification of a Liquid Engine Launch Vehicle Design Using 6DoF Simulations

Creator:: Rose, Trevor J.
Abstract:: In this work, I developed a six degree of freedom flight simulator specific to liquid engine launch vehicles. This flight simulator improves upon available software by accounting for liquid engine specific phenomena such as tank pressurization, liquid engine performance, and center of gravity modeling. Additionally, I implemented methods for optimization...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Trevor J. Rose for the

Using discrete-event simulation to study the influence of log yard sorting on sawmill processing efficiency of small-diameter timber

Creator:: Pinon, Olivia J.
Abstract:: A sawmill is similar to other manufacturing enterprises when it comes to making decisions, scheduling production and meeting customer demands. In order to help sawmills achieve their goals, and because there is such a high degree of variability in the raw material used in this industry, computer simulation has proven...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Olivia J. Pinon for the degree of

Numerical and Experimental Investigation of Wing Flutter Suppression via Distributed Propulsion

Creator:: Anderson, Cole J.
Abstract:: In a seminal paper published in 1982, scientist have warned that humanity was pushing earth’s ecosystems beyond their capacities to support the web of life. One response to the concern was outlined by NASA with its vision for advanced fixed wing transport aircraft to be environmentally compatible and have revolutionary...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Cole J. Anderson for

A study of the characteristics of oscillatory surface instabilities leading to droplet formation

Creator:: Daniels, Brian J.
Abstract:: The characteristics of the free surface in an orifice driven by a periodic forcing function have been studied both theoretically and experimentally. In the theoretical study, two wall boundary condition cases were examined: 1) the radial velocity at the wall of the orifice is zero; and 2) the axial velocity...
Resource Type:: Masters Thesis
Full Text:: instabilities leading to droplet formation AN ABSTRACT OF THE THESIS OF Brian J. Daniels for the degree of

Wave Energy Converter Array Optimization : Algorithm Development and Investigation of Layout Design Influences

Creator:: Sharp, Christopher J.
Abstract:: Realizing the vast amount of energy available in ocean waves, an industry has emerged that is progressing towards the deployment of grid–connected wave energy converters. Likely to be deployed in arrays, a challenge to the wave energy industry is maximizing the energy production of such arrays. We have been developing...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Christopher J. Sharp for the degree of

The Design of a High-Vacuum Chamber Testing Environment

Creator:: Robinson, Kimbert J.
Abstract:: The intention of this undergraduate research project was to design and build a fully functional high-vacuum chamber testing environment for use in the development of ion propulsion engines. This project was conducted in an effort to aid ongoing projects between the Deep Space Propulsion Group (DSPG) at Oregon State University...
Resource Type:: Honors College Thesis
Full Text:: . J. Taylor, “How does an ion gauge work?,” Arun Microelectronics Ltd., 09-Dec-2019. [Online

Flow measurement and characterization in shallow geothermal systems used for downhole heat exchanger applications

Creator:: Churchill, David J.
Abstract:: This thesis reports on an investigation of flow patterns in shallow geothermal wells in Klamath Falls, Oregon, Although wells have been extensively used in the area, the exact nature of the flows in the wells has not been characterized. Flow characterization is a principal object of this study. Horizontal crossflows...
Resource Type:: Masters Thesis
Full Text:: ) concentration-time methods. Taylor and Allen [40] published the first results using a brine solution to trace

Advancing forced draft biomass cookstove technology with computational fluid dynamics modeling

Creator:: Cassidy, Liam J
Abstract:: Today, billions of people are limited to using biomass-fueled traditional fires as a primary energy source for cooking and purification of drinking water. Reliance on open burning of biomass leads to exposure to high levels of household air pollution which has been estimated to claim over 1.5 million lives annually,...
Resource Type:: Masters Thesis

Data-Driven Environmentally Sustainable Product Design: A Shift Toward Increased use of Sustainable Design Activities in the Early Design Phase

Creator:: Ferrero, Vincenzo J.
Abstract:: Modern product design drives the boundaries of innovation by encompassing complex Design-for-X objectives, and the inclusion of multidimensional stakeholders. This growing complexity in product design has left design teams unequipped, as classical design theory is bounded by designer experience, expertise, and cognition. One novel approach to tackling product complexity is...
Resource Type:: Dissertation

A study of compression loading of composite laminates

Creator:: Berbinau, Pierre J.
Abstract:: The compressive behavior of continuous fiber composites is not as well understood as their tensile behavior because research and industrial applications have until recently focused on the latter. Furthermore, most theoretical and experimental studies on the compression of composites have examined the case of unidirectional specimens with fibers along the...
Resource Type:: Dissertation
Full Text:: ABSTRACT OF THE THESIS OF Pierre J. Berbinau for the degree of Doctor of Philosophy in Mechanical

Design of 3D-Printed Soft Pneunet Actuator for Robotic Fruit Harvesting

Creator:: Wilhelm, Lissette J. H.
Abstract:: This work details the development of 3D printed TPU pneunet actuators for use in apple picking for agricultural soft robotics. These actuators increase the force capabilities of soft pneunets and simplify manufacturing. Grippers based on these actuators are ideal for apple picking because they are compliant, yet exert sufficient force...
Resource Type:: Honors College Thesis
Full Text:: / rob.21987. [5] Cecelia Laschi, Matteo Cianchetti, Barbara Mazzolai, Laura Margheri, Maurizio Follador

Adhesive Properties Subject to Variation in Temperature, Thickness, and Working Time

Creator:: Aerne, Nicholas, S. J.
Abstract:: Adhesive use is becoming increasingly common in manufacturing processes. The advantage of adhesives are light weight components, non-destructive fastening techniques and distribution of loads over the applied bond region. Modeling the behavior of adhesive bond lines in fastening joints can help in the design process to make an optimized joint,...
Resource Type:: Masters Thesis
Full Text:: appearance, Mark McGuire, Levi Suryan, Mitch Daniels, Rajib Mahabub, Taylor Rawlings, Eric Shannon

Experimental Validation of the Hydrodynamic Coefficients for an Oscillating Water Column Wave Energy Converter

Creator:: Bentivoglio, Marine M. J.
Abstract:: Resulting from the action of wind over open water surfaces, water waves contain colossal amounts of energy that has not yet been harnessed. Seen as a very promising source for renewable energy generation, many studies have tried to make wave energy a cost competitive source by investigating optimal designs of...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Marine M. J. Bentivoglio

The Effect of Isothermal Aging on the Development of Long-Range Order in Ni-based Alloys

Creator:: Aerne, Nicholas S. J.
Abstract:: Nickel (Ni)-based alloys with a high chromium (Cr) content are frequently employed in applications where elevated temperatures and/or corrosive environments are present due to their excellent corrosion resistance and mechanical properties. However, a gap exists around the formation, and kinetics of long-range order (LRO) Ni2Cr phase in both model binary...
Resource Type:: Dissertation
Full Text:: Dr. David J. Sprouster assisted in the data interpretation and analysis of synchrotron x-ray

Development and validation of acoustic measurement techniques for void fraction in concentric annular geometries

Creator:: Tost, Brian C.
Abstract:: This work investigates the acoustic velocity of gas-liquid mixtures in vertical, co-current flow in a concentric annulus. Acoustic velocity shows promise as a detection parameter for the presence and amount of gas in a liquid flow because of its high sensitivity to gas void fraction in a gas-liquid mixture. However,...
Resource Type:: Dissertation

Large-strain softening of aluminum in shear at elevated temperature

Creator:: Alhajeri, Saleh N.
Abstract:: Pure aluminum deformed in torsion (shear) at elevated temperatures reaches a broad "peak" stress and then undergoes about a 17% decrease in flow stress with deformation to roughly 1-2 equivalent uniaxial strain. Beyond this strain the flow stress is approximately constant. The sources for this softening are unclear. The suggested...
Resource Type:: Masters Thesis
Full Text:: decrease in the average Taylor factor due to the development of texture. Redacted for privacy Large

Turbulent Heat Transfer of Supercritical Carbon Dioxide in the Proximity of the Pseudo-Critical Point with Non-Uniform Heat Flux Boundary Conditions

Creator:: Jajja, Saad A.
Abstract:: Seven decades of supercritical heat transfer research have not seen an attempt to characterize turbulent thermal transport in internal flows subject to asymmetric heating. Existing heat transfer models therefore do not account for phenomena that dictates thermal transport, in the proximity of the pseudo-critical point, for non-uniform heating. Additionally, past...
Resource Type:: Dissertation
Full Text:: calcula- tion, Prandtl-Taylor model for eddy diffusivity was employed [72]. The turbulent Prandtl number

Distortion-induced fatigue cracking of girder-to-crossbeam connection

Creator:: Aljutaili, Dhari S.
Abstract:: Oregon Department of Transportation’s bridge no. 9743b is a multi-span, two-girder steel deck bridge connecting the busy interstates 5 and 205. Vertical cracks have been detected in the welded girder-to-crossbeam connections at the bents. Distortion-induced fatigue is suspected to be responsible for the cracking. Linear elastic beam analysis, 2-D and...
Resource Type:: Masters Thesis
Full Text:: Appendix B. The end moment is expressed as 2 16 .o PLM EI J = (4.2) where 3 3 3 3 2 xb

Design of a mechanically assisted dependent transfer mechanism for use on board commercial aircraft

Creator:: Gibson, Brenton D.
Abstract:: Business and recreation in the modern day world often include air travel as their cornerstone. Travelers who are disabled and wheelchair bound have to undergo a transfer process to board and deplane a commercial aircraft. This transfer process is typically done manually, with agents physically lifting the passenger who is...
Resource Type:: Masters Thesis

Microscale thermal management utilizing vapor extraction from a fractal-like branching heat sink

Creator:: Apreotesi, Mario A.
Abstract:: It is hypothesized that increases in pressure drop due to vapor generation during boiling in microchannels can be reduced by extraction of vapor at its point of inception. Ultimately, this local vapor extraction decreases the pressure drop required to drive the flow through a fractal-like branching, microchannel flow network within...
Resource Type:: Masters Thesis
Full Text:: − − ×=== = A j D AC l hl l loLM σ µ ψ σρ µ ϕ ψϕ (2.7) Mishima and Hibiki [36] ( )hDLM eC 319121

Evaluating complex engineered systems using complex network representations

Creator:: Haley, Brandon M.
Abstract:: This thesis is the combination of two research publications working toward a unified strategy in which to represent complex engineered systems as complex networks. Current engineered system modeling techniques segment large complex models into multiple groups to be simulated independently. These methods restrict the evaluations of such complex systems as...
Resource Type:: Masters Thesis

Experimental Classification of Intralaminar Matrix Compression Damage Propagation in Carbon Fiber Reinforced Polymers

Creator:: Daniels, Mitchell Alan
Abstract:: Composites often are able to carry more load after damage due to the structure of laminates. In addition, damage can be difficult to detect in composites compared to homogeneous materials. Understanding the behavior of composite material after damage is vital for composite structural design. Currently, experimental methods exist for classifying...
Resource Type:: Masters Thesis
Full Text:: , with other damage mechanisms occurring after some propagation. A contour J- integral was used to

Wind turbulence input model for horizontal axis wind turbines

Creator:: Lin, Shuh-ren
Abstract:: In order to estimate wind turbine residL2;characteristics in the presence of atmospheric turbulence, the important atmospheric sources for the force excitations felt by the wind turbine system must be identified and characterized. The goal of this research is to develop the wind turbulence input model for horizontal axis wind turbines....
Resource Type:: Dissertation
Full Text:: ) Time interval a 2 Turbulent velocity component variance Kronecker delta (1 for i = j and 0 for i = j

Direct Numerical Simulation of Anisotropic Particles in Turbulent Flow

Creator:: Roberts, Kai
Abstract:: Turbulent flows with suspended, non-spherical particles are common in many natural and industrial processes. To identify the effects of anisotropic geometry on particle dynamics, a one-way coupled Lagrangian direct numerical simulation solver was written, verified, and used to collect data on particles simulated in multiple flows. This thesis explains the...
Resource Type:: Honors College Thesis
Full Text:: particles with aspect ratios between 1.001 and 25 were simulated in two-dimensional laminar Taylor-Green

Generalized Preconditioning to Accelerate Simulations with Large Multiphase Chemical Kinetics Models

Creator:: Walker, Anthony S.
Abstract:: Combustion emissions produced from burning real transportation fuels have many environmental impacts. However, detailed chemistry across multiple phases, time scales, and thermodynamic conditions make predicting combustion emissions challenging. Detailed modeling of the gas phase alone is prohibitively expensive, due to the large size and stiffness of the kinetic models. The...
Resource Type:: Dissertation
Full Text:: , (2.2.26) and apply a Taylor series approximation to obtain 19 N (S ) = N (Sn−1) + J (N (Sn−1))(Sn

Enabling safety-informed design decision making through simulation, reasoning and analysis

Creator:: Jensen, David Charles
Abstract:: While many organizations claim to "put safety first," safety is rarely considered early in the design process when system-level architectural decisions are made. Instead, system design follows an abstraction-to-detail process to first meet functional and then performance requirements. Following this process, safety assurance occurs in the later stages of design...
Resource Type:: Dissertation

Analysis of energy conversion systems, including material and global warming aspects

Creator:: Zhang, Mingyuan
Abstract:: With the rapid increase of the world energy demand and consumption, the method and techniques to analyze, improve and optimize energy conversion systems have to deal not only with direct fuel exergy (energy) consumption, but also with other resources, which have associated exergy consumptions, and with environmental impacts, such as...
Resource Type:: Dissertation
Full Text:: throughout the duration of my thesis. I also want to thank Dr. Dwight J. Bushnell, Dr. Lorin R. Davis

Modeling and simulation of volume displacement effects in multiphase flow

Creator:: Cihonski, Andrew John
Abstract:: There are many options available when selecting a computational model for two-phase flows. It is important to understand all the features of the model selected, including when the model is appropriate and how using it may affect your results. This work examines how volume displacement effects in two-phase Eulerian-Lagrangian models...
Resource Type:: Dissertation
Full Text:: density ratios in Taylor-Green vortices. A simple modification to the standard point-particle Lagrangian

Modeling of Non-Spherical Particle Dynamics in a Non-Uniform Flow

Creator:: Alshehri, Ahmad S.
Abstract:: Turbulent flow with suspended, non-spherical particles can be found in nature and several industrial applications. Although turbulence with dispersed spherical particles has been studied extensively, modeling the dynamics of non-spherical particles in a turbulent flow has not been studied extensively. Motion of spherical particles in complex flows is typically captured...
Resource Type:: Masters Thesis
Full Text:: the first step, a stationary Taylor-Green vortex flow is used and can be thought of as a single eddy

Temperature Evolution of Nonreacting Spark Kernels at Sub-Atmospheric Pressures

Creator:: Caplan, Daniel L.
Abstract:: In the event of a mid-flight flameout of a gas turbine engine, reignition is paramount to occupant safety. Ignition at high altitude can be challenging, due in part to the potentially lower ambient pressures. An understanding of the effects of sub-atmospheric pressures on the temperature evolution of spark kernels is...
Resource Type:: Masters Thesis
Full Text:: , energy deposition decreased from 1.02 J at 1000 mbar to 0.85 J at 300 mbar, while conversion efficiency

A numerical study of inertial flow features in moderate Reynolds number flow through packed beds of spheres

Creator:: Finn, Justin Richard
Abstract:: In this work, flow through synthetic arrangements of contacting spheres is studied as a model problem for porous media and packed bed type flows. Direct numerical simulations are performed for moderate pore Reynolds numbers in the range, 10 ≤ Re ≤ 600, where non-linear porescale flow features are known to...
Resource Type:: Dissertation
Full Text:: domain formulation (Apte et al., 2009. J Comput Phys 228 (8), 2712-2738) is used, which employs non

A pipe entry length solution for heat transfer and flow in Powell-Eyring fluids with temperature-dependent viscosity and constant flux boundary condition

Creator:: Etchart, David Ygnacio
Resource Type:: Masters Thesis
Full Text:: Engineer g Redacted for Privacy Dean of Graduate School Date thesis is presented Typed by Barbara Eby

Laminar natural convection in vertical tubes with one end closed

Creator:: Fukuda, Masao
Resource Type:: Dissertation
Full Text:: Barbara Hanson for Masao Fukuda ACKNOWLEDGMENTS I would like to thank my major professor and

Design Optimization of a Structurally Flexible Wave Energy Converter with a Direct Search Algorithm

Creator:: Berrier, Austin S.
Abstract:: Several wave energy converter designs have been recently proposed that are made of flexible materials. Flexible devices are able to generate electricity by being stretched, and are intended to simplify deployment and maintenance concerns over existing wave energy devices. Due to the relative infancy of flexible wave energy converters, however,...
Resource Type:: Masters Thesis
Full Text:: showing me what the future of academia can look like. Barbara Simpson for help with modal analysis. Kyle

Stability of some commercial lubricating oil addition agents in an internal combustion engine

Creator:: Robidart, Charles Martin
Abstract:: In the mid 1930's the Diesel engine, which formerly was used only as a large, low-speed machine, was developed into a smaller high-speed engine for use in trucks, busses, and tractors. Along with these changes in mechanical design came many problems, of which a major one was lubrication. Because ordinary...
Resource Type:: Masters Thesis
Full Text:: Jane J. Bower ACKNOdLEDGIVNTS The author wishes to e::press his thanks to Professor Li

Probabilistic Wind Power Forecasting for Hybrid Systems

Creator:: Irmas, Cameron
Abstract:: Wind power forecasting provides valuable insights for demand response, energy market operation, and plant control optimization. Probabilistic approaches—which capture uncertainty in these complex systems by representing predictions as probability distributions—represent a growing area of research in wind energy science. However, their applications for wind-based hybrid systems, particularly those focused on...
Resource Type:: Masters Thesis
Full Text:: the following form: Vt = c+ p∑ i=1 ϕiVt−i + q∑ j=1 θjεt−j + εt (2.3) where Vt is the wind speed

Modes of vibration of inextensible cables suspended from two points

Creator:: Thompson, Roger S.
Abstract:: The equations of motion of a suspended, inextensible cable in the absence of damping are studied. A method is developed and illustrated for determining the frequencies and mode shapes for small oscillations about the equilibrium configuration. With the introduction of a new variable, the fourth order equation governing tangential displacement...
Resource Type:: Masters Thesis
Full Text:: Date thesis is presented July 14, 1970 Typed by Barbara Eby for Roger Steven Thompson

The dynamic shear moduli of blubber for selected large whale species

Creator:: Summers, Michael P.
Abstract:: Whale blubber is the insular tissue layer located between the dermis and the superficial fascia layer which sheathes the whale's musculature. It is made up of a lipid matrix ramified with strong, structural collagen and elastic fiber bundles, but little is known of its mechanical properties. Knowing these properties adds...
Resource Type:: Masters Thesis
Full Text:: research. My thanks also go out to Dr. Bruce Mate, Dr. Deborah Duffield, Dr. Barbara Taylor, Jim Rice

Periodic system analysis with application to wind turbines

Creator:: Bahrami, Mohsen
Abstract:: An algorithm is developed to compute the time averaged, output statistics of a linear system with periodic coefficients forced by stationary white noise. The algorithm makes use of Floquet theory and introduces the averaged system dynamics matrix to obtain more favorable numerical performance. The time series approach to averaged statistics...
Resource Type:: Dissertation
Full Text:: :/' Dean of Graduate choo1 Date thesis is presented January 20, 1982 Typed by Barbara Hanson for Mohsen

A numerical analysis of ice fog produced by automobiles

Creator:: Nelson, William George
Abstract:: A model of an exhaust plume was developed and programmed on a digital computer. The purpose of the model was to predict the concentration and size distribution of ice particles produced from automobile exhaust during arctic conditions. The model accounted for the nucleation, growth, and freezing of the condensed water...
Resource Type:: Dissertation
Full Text:: surface, J, is: J = C 2 exp( - A G S /kT), (5-24) where C2 is a constant. Considering the nucleation

An explicit finite-difference solution for natural convection in air in rectangular enclosures

Creator:: Pagnani, Bruno Richard
Resource Type:: Dissertation
Full Text:: wishes to thank Dr. J. R. Welty for his personal guidance throughout my graduate study program and for

Pre-Prototyping Framework: An Early Design Prototyping Methodology for Human-Centered Products and Workplaces

Creator:: Ahmed, Salman
Abstract:: Prototyping is a crucial step in product design and development, but it is also known as the highest sunk cost. The top 20 Research and Development (R&D) department spends 142 billion dollars, yet 40 to 46 percent of this money goes into developing products that cannot even make to the...
Resource Type:: Dissertation
Full Text:: Normal and Emergency Situations. ASCE-ASME J Risk and Uncert in Engrg Sys Part B Mech Engrg, 6(1

Improved part-load economy using high compression and lean mixtures with the Humphreys variable compression ratio engine

Creator:: Houser, Donald Wilfred
Resource Type:: Masters Thesis
Full Text:: w 0 LL w 40 0 >- 035 30 LL25 >- 0 z w U.. u- W45 w -J 40 o 35 ji LL

Model predictive control for sagittal plane locomotion

Creator:: Maunder, Cary R.
Abstract:: A distinct characteristic of legged locomotion is its periodic nature. This periodic motion, in the form of a periodic orbit, has been the target of many walking and running control strategies. The spring loaded inverted pendulum (SLIP) has become a popular model of sagittal plane locomotion, exhibiting behavior characteristic of...
Resource Type:: Masters Thesis
Full Text:: t s t J t L t u dtφ= + ∫ , (2.1) where φ is the performance index applied at a specific time, st

Risk- and Reliability-Based Design Optimization in Offshore Renewable Energy Systems

Creator:: Clark, Caitlyn E.
Abstract:: Offshore wind and wave energy have the potential to be significant sources of future global electricity production, reduce carbon emissions, decrease dependence on energy importation, and stimulate economic growth in coastal and remote areas. Fixed-foundation and floating offshore wind and wave energy technologies are at different stages of development, but...
Resource Type:: Dissertation

Development of a Cartesian-grid-based solver for an oscillatory boundary layer over a rough wall

Creator:: Skitka, Joseph M.
Abstract:: Predominant models for predicting rates of sediment transport face acute shortcomings when applied to coastal boundary layers. This is due to a neglect of the web of stochastic variables governing the rate of sediment dislodgement. While stochastic models do exist, the parametric extent of their validity tends to be limited,...
Resource Type:: Masters Thesis
Full Text:: values. . . . . . . . . . . . . . 5 3.1 A validation study of the new solver running a Taylor-Green

Optimal High-bandwidth Non-collocated Control of Ball-screw Drives

Creator:: Dumanli, Alper
Abstract:: This work presents a novel optimal control strategy for precision motion control of flexible ball-screw feed drives. Typically, ball-screw feed drive control relies on state feedback taken both from motor and the load sides. The controller designed in this thesis is based on the non-collocated framework, where all the feedback...
Resource Type:: Masters Thesis
Full Text:: ) becomes a scaled and phase-shifted sinusoid as: ( ) ( ){ }( )0 0 0( ) sin argT Te Tey t A G j t G jω ω

The effect of alpha phase morphology on the impact energy of commercial purity titanium

Creator:: York, James Michael
Abstract:: Samples of commercial purity titanium were heat treated above the beta transformation temperature and within the two phase alpha-beta phase field, followed by cooling at varying rates. Testing of the samples in tension and by instrumented impact indicated that some strengthening could be imparted by these heat treatments, although at...
Resource Type:: Masters Thesis
Full Text:: to express my first thanks to my wife, Barbara, whose patience and tolerance during the attainment

Coevolution and transfer learning in a point-to-point fleet coordination problem

Creator:: Yliniemi, Logan Michael
Abstract:: In this work we present a multiagent Fleet Coordination Problem (FCP). In this formulation, agents seek to minimize the fuel consumed to complete all deliveries while maintaining acceptable on-time delivery performance. Individual vehicles must both (i) bid on the rights to deliver a load of goods from origin to destination...
Resource Type:: Masters Thesis
Full Text:: utilized, to great e↵ect. In 2007, Taylor and Stone showed that transfer learning is possible amongst

Characterizing Linkages Between the Climate, Cryosphere, and Impacts on Run-of-River Hydropower in Data-Sparse Mountain Environments

Creator:: Mosier, Thomas M.
Abstract:: In many regions of the world, a significant portion of the surface water originates in mountain headwaters where the timing and magnitude of streamflow is largely dictated by the seasonal storage of precipitation as snowpack and long-term storage as glaciers. Accumulation, persistence, and melt of snow and ice are functions...
Resource Type:: Dissertation
Full Text:: , such as sea-ice. 3 Earth climate system (Taylor et al., 2012; Stocker , 2013).2 Their spatial

DNS study of Particle-bed-Turbulence Interactions in Oscillatory Flows

Creator:: Ghodke, Chaitanya Deepak
Abstract:: Turbulent flows over rough surfaces are encountered in many engineering and geophysical applications. Flows of this nature, due to their increasing technological interests, have been a subject of rigorous investigation in recent years. Of the particular interest to the oceanographic community is the study of turbulent oscillatory flow over rough...
Resource Type:: Dissertation
Full Text:: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 3.3 Integral time scale (tl) and temporal Taylor micro-scale (tλ) of drag and lift fluctuations

Implementation and evaluation of a participating media radiation model in the TEMPEST thermal-hydraulic computer code

Creator:: Rector, David R.
Abstract:: In this work, a method for solving the differential form of the radiative transfer equation was implemented into an existing three-dimensional thermal-hydraulic computer program known as TEMPEST. The method used was the P-l approximation, where the angular distribution of the radiation intensity is represented by a truncated series of spherical...
Resource Type:: Masters Thesis
Full Text:: Applying these simplificatons, Equation 2.4 becomes dI Jus- s j- KI + alb + Idw. 14n (2.5) (2.6

Exact frequencies and mode shapes of a rotating beam

Creator:: Wright, A. D. (Alan Duane), 1954-
Abstract:: The exact frequencies and mode shapes of flexural vibration of a rotating beam are found. The beam has a linear mass and stiffness distribution. With certain simplifying assumptions, the kinetic and potential energies of the rotating beam are found. Hamilton's principle is then used to determine the equation governing the...
Resource Type:: Masters Thesis
Full Text:: Dr. J. R. Welty for providing me with two graduate assistantships. To my parents I owe much for

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:: . . . . . . . . . . . . . . . . . . . . . . . . . 32 3.3 Validation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 3.3.1 Taylor

Elastodynamic analysis of a propagating finite crack in a micropolar elastic solid

Creator:: Han, Seog-young
Abstract:: A dynamic propagation of a finite crack of opening mode in a micropolar elastic solid was investigated. By using an integral transform method, a pair of twodimensional singular integral equations governing stress and couple stress was formulated in terms of the displacement transverse to the crack, macro- and microrotations, and...
Resource Type:: Dissertation
Full Text:: ] have derived a path-independent integral J for spatially fixed paths, which is equivalent to the

Computer-aided model generation and validation for dynamic systems

Creator:: Brisbine, Brian P.
Abstract:: The primary goal of any model is to emulate, as closely as possible, the desired behavioral phenomena of the real system but still maintain some tangible qualities between the parameters of the model and the system response. In keeping with this directive, models by their very nature migrate towards increasing...
Resource Type:: Masters Thesis
Full Text:: . Potential energy of all SDEs between i-th and j-th bodies. Damping energy of all SDEs between i-th and j

Performance of rotary regenerative heat exchanger--a numerical simulation

Creator:: Bae, Young Lib
Abstract:: This thesis examines the transient and steady-state temperature performance of a rotary regenerative heat exchanger. In contrast to previous studies on this problem, fluid flow in the circumferential direction was considered. Appropriate modeling was included to measure the effect of carry-over on the differential equations describing mass and energy conservation....
Resource Type:: Dissertation
Full Text:: heat transfer area in the device, m B coefficient matrix of an error function c specific heat, J

Response of guyed offshore towers to stochastic loads in the presence of steady current

Creator:: Brynjolfsson, Sigurdur
Abstract:: The validity of the widely used stochastic linearization method for analysing the response of guyed towers to stochastic loads is investigated. The governing equations of a guyed tower have two main sources of nonlinearities, fluid-structure interaction and the restoring force of the cables. In this study, two models are considered....
Resource Type:: Dissertation
Full Text:: identical results. Eatock Taylor and Rajagopalan25 investigated the influence of current on the wave

Detecting fluid flows with bioinspired hair sensors

Creator:: Dickinson, Benjamin T.
Abstract:: Many animals detect prey or enhance their locomotion with information from hair-like receptors that are activated by local fluid flows. The utility of biological hair receptors has motivated the design of artificial hair sensors (AHS) for flow control applications where aerodynamic or hydrodynamic forces play a significant role in the...
Resource Type:: Dissertation
Full Text:: . 5 THE DETECTION OF UNSTEADY FLOW SEPARATION WITH BIOINSPIRED HAIR-CELL SENSORS B. T. Dickinson, J

Electronic instrumentation for measuring detonation in spark and compression ignition engines

Creator:: Hanley, William Vincent
Resource Type:: Masters Thesis
Full Text:: Capacitance type developed by J. Obata and Y. Yosida ¡nade use of the change in capacitance with ohanpe in

Smooth Trajectory Generation for Machine Tools and Industrial Robots

Creator:: Tajima, Shingo
Abstract:: This thesis presents accurate and time-optimal smooth reference trajectory generation techniques for manufacturing equipment such as high-speed machine tools (MT) and industrial robots (IR). Typical machining tool-paths for MTs and IRs are defined as a series of discrete linear moves. Although Point-to-Point (P2P) feed motion can be generated by interpolating...
Resource Type:: Dissertation
Full Text:: , acceleration a(t), velocity v(t) and displacement s(t) profiles can be obtained by integrating the jerk j(t

Feasibility study of a surface vehicle utilizing a unitary control system

Creator:: Bassett, David Arthur
Abstract:: A feasibility and practicality study was made of an automotive-type surface vehicle that employed a centralized or unitized means of control. The control functions consisted of: steering, acceleration, deceleration, clutch actuation, gear changes, turn signal operation and horn actuation. These controls were arranged in such a manner that the driver...
Resource Type:: Masters Thesis
Full Text:: Privacy Dean of Graduate School Date thesis is presented gi /97L Typed by Barbara Eby for David Arthur

An analytic approach to temperature distribution in a thin-walled combustion chamber

Creator:: Gorski, Saul Bogdan
Resource Type:: Masters Thesis
Full Text:: Dan öfraduate School Date thenis is presented )y 12, 1960 Typed by Barbara O'Brien TAßLE 0F

Flow induced mixing in high aspect ratio microchannels

Creator:: Siripoorikan, Bunchong
Abstract:: Micro-fluid mixing is an important aspect of many of the various micro-fluidic systems used in biochemical production, biomedical industries, micro-energy systems and some electronic devices. Typically, because of size constraints and laminar flow conditions, different fluids may only have the opportunity to mix by diffusion, which is extremely rate limited....
Resource Type:: Masters Thesis
Full Text:: intensity mean. The equation is shown in equation 2.1. At perfect mixing, D1 =0. 10 D, J)2 ... (2.1) A

Investigation of volumetric coupling effects on particle-laden turbulent flows at dilute to moderate loadings

Creator:: Cihonski, Andrew John
Abstract:: Particle-laden turbulent flows are of great importance in many industrial applications and are sufficiently complex to require multiple methods of study to provide a better understanding of the dominant physical mechanisms present in these processes. This work on large-eddy simulation of particle-laden flows seeks to help provide the building blocks...
Resource Type:: Masters Thesis
Full Text:: -Taylor Instability . . . . . . . . . . . . . . . . . . . . . . . 56 5.5 Gravitational Settling

Development and Application of a Reduced Chemical Kinetics Model for Low-Speed Pre-Ignition Investigation

Creator:: Tran, Khang NV.
Abstract:: Gasoline direct injection engines, with downsized boosted technology, present a promising option for enhancing power density and reducing fuel consumption for next-generation engine designs to meet stringent fuel economy and emission standards. However, these developments in the low-speed and high-load operating regime are challenged by the occurrence of a new...
Resource Type:: Masters Thesis

The effect of a canard surface on the total lift of an unswept wing in subsonic flow

Creator:: Rasmussen, Maurice Lee
Resource Type:: Masters Thesis
Full Text:: rolled up 7 25 f' I' ____ ____ i4IP,Çf7 Wh4IA 7h/Ç VOR (\I (j I I U -6 X, q

The effect of detonation on piston ring wear

Creator:: Olson, Donel Rudolph
Resource Type:: Masters Thesis
Full Text:: structural ric-idity yet permitting a very flexible diaphragm. SIPS.. li FGI $N NC_al IC NC PAT O J

Numerical study of natural convection in square partitioned and non-partitioned enclosures

Creator:: Sukkaset, Prasart
Abstract:: Heat transfer characteristics and associated temperature and flow fields for natural convection in two-dimensional, square, partitioned and non-partitioned enclosures have been determined for Grashof numbers ranging from 10³ to 10⁶. The vertical side walls of the enclosure are isothermal with all other surfaces assumed to be adiabatic. An adiabatic partition...
Resource Type:: Dissertation
Full Text:: showing storage locations for variables (j), ip, u and v. 39 5. A (1)-control volume. 43 6. Quadratic

Optimal soaring by a small autonomous glider

Creator:: Kyle, Jason A.
Abstract:: Extending the flight time of an autonomous unmanned air vehicle by soaring is considered. A suboptimal controller is developed and successful static soaring is demonstrated with a 6 degree of freedom glider model. Altitude gain rates of between ¼ and ½ m/s are achieved with this simple implementation. A hybrid...
Resource Type:: Dissertation
Full Text:: be approximated by a Taylor series polynomial of order iR . 2 2 2( ) ( ) 2 ! i i i R R i R

CLEAN learning to improve coordination and scalability in multiagent systems

Creator:: HolmesParker, Chris
Abstract:: Recent advances in multiagent learning have led to exciting new capabilities spanning fields as diverse as planetary exploration, air traffic control, military reconnaissance, and airport security. Such algorithms provide a tangible benefit over traditional control algorithms in that they allow fast responses, adapt to dynamic environments, and generally scale well....
Resource Type:: Dissertation

Heat transfer to lubricating oil of an internal combustion engine with varying operating conditions

Creator:: Aungst, Raymond Charles
Resource Type:: Masters Thesis
Full Text:: in rIla1or and Taylor, "The Internal-Combustion Engine", presenting that data. It was, in fact, a

Tentative equilibrium diagram for the nickel-rich end of the nickel-zirconium system

Creator:: Armstrong, Asa William
Resource Type:: Dissertation
Full Text:: too Redacted for privacy Dean of Graduato School Dato thesis is preseted jaij953 Typed by Jano J

Stagnation point heat transfer in a relaxing gas

Creator:: Wilson, Robert E.
Abstract:: Stagnation point heat transfer in a gas undergoing relaxation of its internal energy is examined by solution of the equations of motion using the two temperature approach of Wang Chang and Uhlenbeck. The results are presented in parametric form and show that relaxation effects produce an adiabatic wall temperature above...
Resource Type:: Dissertation
Full Text:: Results 77 3. Boundary Layer Profiles, T = T 78 w 00 D= 100 p = 0. 7 P. = 10 R= 0.2 a. = 1.2 j = 1 78

Numerical simulation of cavitating bubble-laden turbulent flows

Creator:: Shams Sobhani, Ehsan
Abstract:: Many engineering devices and propulsion systems suffer from undesirable effects of cavitation; such as degradation in the efficiency of pumps and turbines, generation of noise and vibration on ship propeller, increased drag and erosion of propeller blade, etc. In spite of decades of research on this problem, detailed study of...
Resource Type:: Dissertation
Full Text:: Flows 40 4.1 Taylor-Green vortex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 4.2

An Information Modeling Framework for Support of Sustainable Manufacturing System Design Decision Making

Creator:: Shankar Raman, Arvind
Abstract:: Manufacturing technology has continuously evolved and advanced over the past century; this has led to an increase in the production of consumer and industrial goods driven by simultaneous growth in population and wealth. Despite the resulting economic and labor growth, environmental impacts of manufacturing have increased dramatically due to the...
Resource Type:: Dissertation
Full Text:: four collaborators: Dr. Barbara Linke (Conventional Manufacturing), Dr. Kamyar Raoufi (Nano

Design, Fabrication, and Evaluation of a Novel High-Performance Resistance Heater Rod for Nuclear Thermal Hydraulic Experimentation

Creator:: Sharaf, Salem A.
Abstract:: The Accident Tolerant Fuels campaign demonstrated a need for nuclear fuel pin simulators to further research fuel and cladding combinations that can withstand off normal conditions in light water reactors. The use of a heater rod as a fuel pin simulator greatly reduces the risk involved during testing as no...
Resource Type:: Masters Thesis
Full Text:: ............................................................................................................ 6 Figure 2.1.2: Taylor and Helmholtz Instabilities

Active and Passive Structural Vibration Mitigation for High-Speed Machine Tools

Creator:: Indrarto, Christopher Wilfred
Abstract:: This thesis presents novel feedback and feedforward control system design strategies for active to passive vibration mitigation of residual vibrations on high speed machine tools. Residual vibrations on high-speed machine tools are triggered when the machine axes (table) undergo large accelerations, which induce sudden inertial forces and excite the lightly...
Resource Type:: Masters Thesis
Full Text:: m m m m i m M m M m M G j j G j G j G j j G j      =  +   =    +  (5

Potential of Genetic Algorithms for Design of Liquid Cooled Heat Sinks Fabricated Using Additive Manufacturing

Creator:: Dokken, Connor B.
Abstract:: The advancement of new manufacturing techniques such as additive manufacturing enable significantly greater freedom of design compared to conventional techniques. Of significant interest is what improvements could be made in the design of cold plates and heat sinks for electronics cooling. Greater design freedom could potentially enable new designs that...
Resource Type:: Masters Thesis
Full Text:: ) 116 J/mm3, b) 77 J/mm3 and c) 66 J/mm3. (Bauer, Dawson, Spierings, & Wegener, 2013

Numbering-up of parallel microchannel arrays to megawatt scale supercritical CO₂ solar thermal receivers

Creator:: Hyder, Matthew B.
Abstract:: Concentrated solar power (CSP) plants have the potential to reduce the reliance on nonrenewable energies such as coal and natural gas and provide 24 hour, renewable electricity. A CSP system consists of a large field of heliostats that concentrate the sunlight on a centralized receiver, in this receiver a working...
Resource Type:: Masters Thesis
Full Text:: Specific enthalpy (J kg-1) Km Minor loss coefficient ṁ Mass flow rate (kg s-1) MD Maldistribution

Dynamics and control of a rigid/flexible manipulator

Creator:: Yeh, Chun-tien
Abstract:: Control of high-speed, light-weight robotic manipulators is a challenge because of their special dynamic characteristics. In this work, a two-stage control algorithm for the position control of flexible manipulators is proposed. First, the more complex, flexible robot system is replaced by a simplified hypothetical rigid body system (HRRA) with off-line...
Resource Type:: Dissertation
Full Text:: Flowchart of Subroutine CPI of computing performance index J for a given set of Ritz constants C1 and tf 53

Cold trap performance : a general analysis

Creator:: Rothwell, Micheal Olin
Abstract:: A cold trap is a device used to remove certain impurities from a liquid metal by controlled precipitation of such impurities. An investigation of the thermal characteristics of laminar flow in two air-cooled cold traps was made. This investigation showed that the sodium heat transfer rate is a function of...
Resource Type:: Masters Thesis
Full Text:: Redacted for Privacy Dean of Graduate School Date thesis is presented May 7, 1971 Typed by Barbara Glenn

Numerical Investigation of Unsteady Inertial and Turbulent Flows Through Porous Media: Pore-scale DNS, Flow Analyses and Upscaling

Creator:: He, Xiaoliang
Abstract:: Porous media are the materials containing void space or pores, where fluids and gases can pass through. Unsteady flows in porous media are encountered in many engineering applications and natural problems, such as CO₂ sequestration, high temperature nuclear reactor cooling, high efficiency combustion, chemical reactors, noise reduction on airplane trailing...
Resource Type:: Dissertation
Full Text:: is similar in many ways to the secondary flows that have been reported by Taylor and others for

An experimental investigation of transition pool boiling

Creator:: Aoki, Tadao
Abstract:: The heat-transfer phenomena studied in this work were associated with pool boiling from a flat horizontal surface facing upward with the bulk liquid at its saturation temperature. The analysis of boiling sound and the investigation of the transition boiling mechanism constituted the essence of the present study. The distinctively large...
Resource Type:: Dissertation
Full Text:: densities superposed one over the other has been studied by Rayleigh (12) and Taylor (15). Bel lman and

Towards a guided framework for innovative engineering through the generation and evaluation stages of concept design

Creator:: Oman, Sarah Kay
Abstract:: This work proposes a framework of concept generation and evaluation that takes into consideration the benefit of creativity and innovation in current market trends. By educating engineers in how to increase creativity in concept design and assess it quantitatively, the next generation of designers will be a step ahead of...
Resource Type:: Dissertation
Full Text:: (Taylor 1988). Just as creativity can be broken into four categories (environment, product, process

Some factors affecting the heat transfer in a finned tube radiator using low pressure steam and hot water as a heat source

Creator:: Waterhouse, Alvin Sidney
Resource Type:: Masters Thesis
Full Text:: - operated controller manufactured by the Taylor instrument Company. The system consists of a Taylor

Laminar natural convection in vertical tubes with one end open to a large reservoir

Creator:: Wu, Yissu
Resource Type:: Dissertation
Full Text:: this department. Thanks to R. J. Murphy, who works in the University Computer Center, for his quick

An aeroelastic analysis of the Darrieus wind turbine

Creator:: Meyer, Edward Earnest
Abstract:: The stability of small oscillations of the troposkeinshaped blade used on Darrieus wind turbines is investigated. The blade is assumed to be attached to a perfectly rigid rotor shaft and spinning in still air. Linear equations of motion are derived which include the effects of in-plane, out-of-plane, and torsional stiffness,...
Resource Type:: Dissertation
Full Text:: of the blade (-1)1/2 k. (j=1,2,3) stiffness ratios K. (j=0,1,2,3,4) stiffness matrices k

An examination of point defects and atomic diffusion in silicon

Creator:: Monson, Tyrus K.
Abstract:: The self-interstitial defect is commonly regarded as important in regulating diffusion in silicon. A review of the literature reveals that the scientific bases for invoking the self-interstitial defect are weak, while an alternate defect, the vacancy cluster, has been largely ignored. One argument which has been used to establish dominance...
Resource Type:: Dissertation
Full Text:: from their data. Taylor et al.' reviewed 7 published diffusivity values for the Si, defect. There

High Temperature Electrical Properties of Ceria-Based Ceramics for Use as Electrodes in Magnetohydrodynamic Power Generators

Creator:: Bowen, Michael S.
Abstract:: Determining the electrical properties of ceria-based materials is important for their use as electrodes in hot-wall magnetohydrodynamic (MHD) power generators with wall temperatures greater than 1500 ̊C. The electrical conductivity of a material can be used in models for predicting the performance of generator designs. More specifically, the temperature dependent...
Resource Type:: Dissertation
Full Text:: 5: • Olivia Remcho – sample fabrication • Ian J. Hofbeck – x-ray diffraction characterization

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