Index Catalog // ScholarsArchive@OSU

Flow characteristics of semi-confined impinging jet arrays

Creator:: Dano, Bertrand P. E.
Abstract:: The present study proposes to investigate the flow structure of different arrays of jets impinging on a flat surface enclosed by three walls, creating a channel that forces the air to leave in one preferential direction, generating a self sustain crossflow. Details of both the mean and some turbulence quantities...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: James A. Liburdy The present study proposes to investigate the flow structure of

Interactions of a fully modulated inclined jet with a crossflow

Creator:: Dano, Bertrand P. E.
Abstract:: Jets in crossflow are used in a wide range of engineering applications and have been studied for more than 60 years. The transversal penetration and structure of a jet placed in a crossflow is known to be strongly three-dimensional. It is believed that, by using a pulsed jet inclined in...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Bertrand P. E. Dano for the

An experimental study of combined forced and free convective heat transfer to non-Newtonian fluids in the thermal entry region of a horizontal pipe

Creator:: Kim, Yong Jin, 1956-
Resource Type:: Dissertation
Full Text:: Abstract approved: James R. Welty \, The case of combined free and forced convection heat transfer in

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

Creator:: Wu, Yissu
Resource Type:: Dissertation
Full Text:: VERTICAL TUBES WITH ONE END OPEN TO A LARGE RESERVOIR Abstract approved: James R. Welty The problem of

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:: privacy Prqgessor James R. Wel Heat transfer characteristics and associated tem- perature and flow

Laminar natural convection in vertical tubes with one end closed

Creator:: Fukuda, Masao
Resource Type:: Dissertation
Full Text:: department head, Dr. James R. Welty for his constructive suggestions to my thesis work and financial

Chemometrics-based Approach for Predicting Low Temperature Combustion Engine Fuel Performance

Creator:: Daly, Shane
Abstract:: Low temperature combustion (LTC) engines offer improved efficiency and reduced emissions over traditional gasoline spark-ignited and diesel compression-ignition engines. The ability to produce fuels optimized for LTC engines could help increase efficiency and therefore improve fuel economy, insomuch that Federal fuel economy standards could be met. Currently, a fuel performance...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ Christopher L. Hagen Kyle E

Visual study of hydrodynamics in a two-dimensional gas-solid fluidized bed

Creator:: Freeman, Lisa Nalani
Abstract:: Hydrodynamic effects play important roles in fluidized bed combustion processes. Since the motion of "bubbles" is an important influence on fluidized bed heat transfer, a better understanding of their behavior is necessary for improving the design of fluidized bed boilers. Using a two-dimensional bed, silica sand particles were fluidized with...
Resource Type:: Masters Thesis
Full Text:: fluidization e. . Bubbling fluidization 1 N V Gas or liquid Gas or liquid Liquid Gas (low velocity) (a) (b

A numerical study of the response of Lake Kinneret to wind forcing

Creator:: Vernieres, Guillaume
Abstract:: Lake Kinneret is Israel's only fresh water lake (unless you count the Dead Sea). It spans roughly 20km from north to south, and about 12km at its widest east west extent. It is not quite 50m deep at its deepest point. In late spring, the lake stratifies significantly and remains...
Resource Type:: Masters Thesis
Full Text:: Kinneret to Wind Forcing Abstract approved. James Liburdy Lake Kinneret is Israel's only fresh water

Hydrodynamics of droplet impingement on heated surfaces : effects of nanofluid and nano-structured surface

Creator:: Shen, Jian
Abstract:: This study investigates the hydrodynamic characteristics of droplet impinging on heated surfaces using High Speed High Resolution (HSHR) imaging and evaluates the effect of surface temperature and using water and a nanofluid on a polished and a nano-structured surface. Three types of surfaces are used in the study: polished silicon,...
Resource Type:: Dissertation
Full Text:: James A. Liburdy This study investigates the hydrodynamic characteristics of droplet impinging

Influence of laser processing on the corrosion and microstructure of zirconium based material

Creator:: Reitz, W. (Wayne)
Resource Type:: Dissertation
Full Text:: Processing on the Corrosion and Microstructure of Zirconium Based Material. Abstract Approved: James

The energy extraction performance of an oscillating rigid and flexible foil

Creator:: Totpal, Alexander D.
Abstract:: The aerodynamic performance of an oscillating pitching and plunging foil operating in the energy harvesting mode is investigated. Experiments are conducted in a closed-loop recirculating wind tunnel at Reynolds numbers of 24,000 to 48,000, and reduced frequencies (k = fc/u) of 0.042 to 0.083. Foil kinematics are varied through the...
Resource Type:: Masters Thesis
Full Text:: Energy Extraction Performance of an Oscillating Rigid and Flexible Foil Abstract approved: James A

Phase Separation in Microscale Convective Boiling

Creator:: Lewis, Kevin Terrence
Abstract:: It is hypothesized that extracting the vapor from two-phase flow in a microchannel will result in a lowered pressure drop required to drive the flow. The goal of this thesis is to construct an experimental device that will test this hypothesis by comparing a number of phase separating test conditions...
Resource Type:: Honors College Thesis
Full Text:: . Abstract approved: James Liburdy It is hypothesized that extracting the vapor from

Energy Harvesting Performance of a Flapping Foil with Leading Edge Motion

Creator:: Prier, Michael W.
Abstract:: Force data for a flapping foil energy harvester with active leading edge motion operating in the low reduced frequency range is collected to determine how leading edge motion affects energy harvesting performance. The foil pivots about the midchord and operates in the low reduced frequency range of 0.06, 0.08, and...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ James Liburdy Force data for a flapping foil energy harvester with active leading edge

Analyzing manufacturing system changes using discrete event simulation

Creator:: Baker, Eric S.
Abstract:: This research studied the effects of changing from a traditional manufacturing system to a cell manufacturing system in a value-added wood products company. Discrete event simulation was used to describe the current system and the proposed new systems. Parts were separated into part families that shared similar processing requirements. From...
Resource Type:: Masters Thesis

A relationship between wave dispersion and fracture strength for a composite material

Creator:: Ilcewicz, Larry Bert
Abstract:: Wave dispersion and fracture are phenomena that involve. mechanisms triggered at the scale of a material's internal structure. Experiments were performed with a candidate material to judge the hypothesis that wave dispersion measurements can be used to nondestructively predict fracture strength. Wood-based particleboard was chosen as the candidate material because...
Resource Type:: Dissertation
Full Text:: approved: Tim C Ke nedy James B. Wilson Wave dispersion and fracture are phenomena that involve

Microscale thermal management using membrane vapor extraction

Creator:: Apreotesi, Mario A.
Abstract:: With the miniaturization of microelectronics and increase of processor speeds in the last few decades, thermal management is drastically affecting overall packaging and system capabilities. Due to the special needs introduced, research focusing on microscale cooling has increased. This study combines the positive characteristics of single- and two-phase flows in...
Resource Type:: Honors College Thesis
Full Text:: : heat sinks, vapor extraction, membrane, microchannel, two-phase flow Corresponding e-mail address

Partial recirculation of diesel engine exhaust for the reduction of oxides of nitrogen

Creator:: Addicott, Donald James
Abstract:: Oxides of nitrogen are a concern as effluents to atmospheres because they participate in photochemical reactions which produce smog, because they attenuate sunlight which gives the atmosphere a reddish brown cast, and because of their toxic properties and the health hazards associated with the photochemical products they produce. Oxides of...
Resource Type:: Masters Thesis
Full Text:: reduction of oxides of nitrogen AN ABSTRACT OF THE THESIS OF Donald James Addicott for the M. S. in

Properties of veneer sliced from serpentine-end-matched flitches

Creator:: Liu, Yuqing
Abstract:: Eighteen Ponderosa Pine (Pinus ponderosa Dougl.ex.laws) veneer flitches were randomly selected and crosscut into paired flitches. Serpentine-end-matched (SEM) joints were machined in the flitches, joint amplitude equal to the width in one half of the paired flitch and joint amplitude equal to 2/3 width in the other half of the...
Resource Type:: Masters Thesis

Heat generation rates of nonfissionable materials in a nuclear reactor environment

Creator:: Zimmerman, Paul James
Abstract:: Radiation induced heat generation rates of several nonfissionable materials were measured calorimetrically in a nuclear reactor environment. The calorimeter was uniquely designed to allow many materials of grossly different heat generation rates to be measured. heat transfer characteristics of the calorimeter were determined analytically and experimentally. Materials were chosen to...
Resource Type:: Masters Thesis
Full Text:: Rates of Nonfissionable Materials In A Nuclear Reactor Environment by Paul James Zimmerman A THESIS

An analytical model of heat transfer to a horizontal cylinder immersed in a gas fluidized bed

Creator:: Adams, Ronald Lynn
Abstract:: A steady gas convection model of heat transfer to a horizontal cylinder immersed in a gas fluidized bed is presented. Contributions due to flow within attached bubbles as well as the interstitial voids are included. The interstitial flow is approximated as flow within a series of double cusped channels and...
Resource Type:: Dissertation
Full Text:: Abstract approved: James R. Welty/ A steady gas convection model of heat transfer to a horizontal

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:: like to express my sincere appreciation to Dr. James Welty for his continuing help and guidance during

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:: approved:_____________________________________________________ James Liburdy Hydrogels have been

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

Fracture energies of Zircaloy and some zirconium alloys

Creator:: Rawers, James C.
Abstract:: The fracture mechanics of Charpy V-notch specimens of Zircaloy-4 and phosphorus contaminated Zircaloy-4 were investigated. Three-point bend and impact tests with Charpy V-notch samples provided an efficient and economical method of fracture evaluation. Fracture failure was monitored by the force-displacement curve. Failure was initially analyzed using fracture toughness values as...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF JAMES C. RAWERS for the degree of DOCTOR OF PHILOSOPHY in Mechanical

Leading Edge Separation Analysis of Oscillating Airfoil Energy Harvesters

Creator:: Ngo, Vickie
Abstract:: Oscillating foil energy harvesters are analyzed at optimal reduced frequencies (𝑘=𝑓𝑐/𝑈) to determine how the leading edge radius of curvature affects leading edge separation. The understanding of leading edge separation and its behaviors is critical to predicting the transient lift profile of an airfoil. The separation is therefore also critical...
Resource Type:: Masters Thesis
Full Text:: approved: James A. Liburdy Oscillating foil energy harvesters are analyzed at optimal reduced

Physical properties of JP-5 fuel at elevated temperatures

Creator:: Welty, James Richard
Resource Type:: Masters Thesis
Full Text:: PHYSICAL PROPERTIES OF JP-5 FUEL AT ELEVATED TEMPERATURES by JAMES RICHARD WELT? A ThESIS

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:: Abstract approved: James A. Liburdy The energy harvesting performance of oscillating airfoils is studied

An experimental study of plane jets issuing at various angles into a cross-flow

Creator:: Hadjilambrinos, Constantine
Abstract:: An experimental study of the properties of plane jets issuing at various angles into a cross-flow of air was conducted to obtain information relating to the momentum diffusion properties of the jet flow in order to provide a background for predicting the feasibility of the preswirl concept of the Volumetric...
Resource Type:: Masters Thesis
Full Text:: jet cross-section for R = 4.0, e = 90, y/h = 15 5 63 A.9 Velocity distribution in jet cross-section

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:: . James R. Welty, Oregon State University; Dr. Richard E. Collingham and C. E. Linderoth, Manager, Sodium

Monte Carlo simulation of radiation heat transfer in a three-dimensional enclosure containing a circular cylinder

Creator:: Hong, Seung-Ho
Resource Type:: Masters Thesis
Full Text:: , Dr. James R. Welty, for his encouragement and guidance throughout the course of this study. Thanks

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:: of Commercial Purity Titanium AN ABSTRACT OF THE THESIS OF James Michael York for the degree of

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

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

Creator:: Pagnani, Bruno Richard
Resource Type:: Dissertation
Full Text:: beat transfer characteristics comp Led for the \ \) Y Dr. James R. w enclo pur.. were compared

Analysis of heat transfer, including axial conduction, for laminar tube flow with arbitrary circumferential wall heat flux

Creator:: Faghri, Mohammad
Abstract:: This thesis is concerned with the analysis of heat transfer in a tube with forced flow under conditions of an arbitrary variation of wall heat flux both axially and circumferentially. This total study is separated into two distinct problems which are presented separately. The first is the case of a...
Resource Type:: Dissertation
Full Text:: FLOW WITH ARBITRARY CIRCUMFERENTIAL WALL HEAT FLUX Abstract approved: Redacted for privacy James R

An analytical model for fatigue crack propagation

Creator:: Anderson, James L.
Abstract:: Beginning with the basic equations from the theory of elasticity and employing a model of crack propagation based on the concept of a constant plastic energy absorption per unti of crack extension, the commonly accepted power law of fatigue crack propagation was derived. This derivation uses an extension of the...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF James L. Anderson for the

A numerical solution for heat transfer to non-Newtonian fluids with temperature-dependent viscosity for arbitrary conditions of heat flux and surface temperature

Creator:: Cochrane, G. F. (Glenn Frank)
Resource Type:: Dissertation
Full Text:: encouragement of the author's major advisor Dr. James R. Welty are gratefully acknowledged. His efforts were a

An experimental investigation of heat transfer in the transition and turbulent regimes for natural convection in mercury in a uniformly heated vertical channel

Creator:: Humphreys, William Warren
Resource Type:: Masters Thesis
Full Text:: is presented 5 June 1974 Typed by Cheryl E, Curb for William Warren Humphreys ACKNOWLEDGEMENTS I

A comparative study of the performance of pin finned heat sinks for cooling electronic components by natural convection

Creator:: Manolescu, Mircea Ion
Abstract:: A study was conducted to determine the heat transfer characteristics of pin finned heat sinks in natural convection. Three pin diameters were studied: 0.238 cm, 0.318 cm and 0.396 cm. The pins were attached to the base in two arrangements, triangular and rectangular, forming a horizontal array. Pin spacing was...
Resource Type:: Masters Thesis
Full Text:: . To Dr. James R. Welty for the always patient way of giving valuable advice and for constant

Heat and mass transfer rates associated with the drying of plywood veneer using superheated steam at various angles of impingement

Creator:: South, Veeder, III
Resource Type:: Masters Thesis
Full Text:: IMPINGEMENT Abstract approved:____ James R. Weltr Southern pine and Douglas fir sapwood veneer were dried

Vortical Structures in Transition to Turbulence through Randomly Packed Porous Media: Scale, Energy, and Mixing Characteristics

Creator:: Mohammadi Ziazi, Reza
Abstract:: Vortical structures are the driving mechanism of transition to turbulence in porous media requiring adequately resolved observations along with analysis of the scale and energy of ﬂow within the pores. Of speciﬁc interest is to understand the vortex dynamics, energy, and turbulent mixing and transport properties in the scale of...
Resource Type:: Dissertation
Full Text:: Mixing Characteristics Abstract approved: James A. Liburdy Vortical structures are the driving

Hydrodynamic signatures of a 2-D gas-solid fluidized bed

Creator:: Kopczynski, Sean Peter
Resource Type:: Masters Thesis
Full Text:: Fluidized Bed. Abstract approved: Redacted for Privacy James R. Welty! Experimental observations of

The effect of entrance configuration on local heat transfer coefficients in subsonic diffusers

Creator:: Stoffel, Edward Oswald
Abstract:: The effects of round, square, and reentrant entrances on flow regimes and local heat transfer coefficients were determined using a symmetrical, plane-wall two-dimensional, subsonic air diffuser with one of the diverging walls heated and maintained isothermal. Flow and heat transfer studies were made at total divergence angles ranging from 0...
Resource Type:: Masters Thesis
Full Text:: SUBSONIC DIFFUSERS Abstract approved: James R. We'ty The effects of round, square, and reentrant

An experimental study of natural convection in air between a vertical isothermal flat plate and a parallel insulted flat plate

Creator:: Lee, Soon Mo
Abstract:: The free convective heat transfer phenomena in air between two vertical plates 24 by 38 inches spaced 15.895 mm apart, was investigated in this experimental study. One plate was isothermal and, the other adiabatic. A quartz fiber anomometer was used for measuring local velocities in the air between the vertical...
Resource Type:: Masters Thesis
Full Text:: vertical position. V James R. elty An Experimental Study of Natural Convection in Air Between a

Use of an optical probe to study the hydrodynamics of a gas-solid fluidized bed

Creator:: Arib, Fouad
Resource Type:: Masters Thesis
Full Text:: major professor, Dr. James R. Welty, for his guidance and valuable advice during the course of this

Constrained thin film desorption through membrane separation

Creator:: Thorud, Johnathan D.
Abstract:: A constrained thin film desorption scheme has been experimentally tested to determine the desorption rates for water from an aqueous lithium bromide mixture through a confining membrane. Variable conditions include the inlet concentration, pressure differential across the membrane, and channel height. Desorption takes place in a channel created between two...
Resource Type:: Masters Thesis
Full Text:: Thin Film Desorption Through Membrane Separation Abstract approved: James A. Liburdy A constrained

An experimental study of natural convection in air between a vertical isothermal flat plate and a parallel insulated flat plate

Creator:: Kim, Sung-Soo
Abstract:: Natural convection heat transfer in air between two vertical plates 38 by 24 inches was investigated in this work with spacings between the plates of 0.625, 1.0 and 1.75 inches. One plate was isothermal and the other adiabatic. To measure the point velocities in the air layer a very thin...
Resource Type:: Masters Thesis
Full Text:: FLAT PLATE AND A PARALLEL ,INSULATED. FLAT PLATE Redacted for privacy James R. Welt Abstract approved

Heat transfer during the piston-cylinder expansion of a gas

Creator:: Rodrigues, Matthew Jose
Abstract:: The expansion of a gas within a piston-cylinder arrangement is studied in order to obtain a better understanding of the heat transfer which occurs during this process. While the situation of heat transfer during the expansion of a gas has received considerable attention, the process is still not very well...
Resource Type:: Masters Thesis
Full Text:: James A. Liburdy The expansion of a gas within a piston-cylinder arrangement is studied in order

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:: BOUNDARY CONDITIOly1 r. 411 Redacted for Privacy Abstract approved: Dr. James 'R. *eity Solutions were

Solid/liquid phase change in small passageways : a numerical model

Creator:: Coven, Patrick J.
Abstract:: During the operation of phase-change ink-jet printers a bubble formation phenomenon often occurs. These bubbles are detrimental to the operation of the printer and substantial efforts are made to remove them. The objective of this research was 1: to develop a fundamental understanding of how bubble or void formation occurs...
Resource Type:: Masters Thesis
Full Text:: 940 - `-'3-') E 920 - c 900 - 0 880 - 860 0 20 40 60 80 100 120 140 160 Temperature (C) Figure

Investigation of instantaneous hydrodynamics and heat transfer to a horizontal tube immersed in a high-temperature gas-solid fluidized bed of large particles

Creator:: Burr, Marlene Mainland
Resource Type:: Dissertation
Full Text:: ,5mf Pr 113 (1 e(°)) E (0) 0'8 for the emulsion phase, and Nup,b = D, 0.73 .1%l. mf Re" for the

Experimental studies of heat transfer with an array of horizontal tubes immersed in a high-temerature fluidized bed

Creator:: Goshayeshi, Ali
Abstract:: An experimental study is described in which time-average local heat transfer coefficients were obtained for arrays of horizontal tubes immersed in a hot fluidized bed. Spatial-averaged heat transfer coefficients, computed from local values, are also reported. Refractory particles with surface mean diameters of 2.14 mm and 3.23 mm were fluidized...
Resource Type:: Dissertation
Full Text:: Fluidized Bed Abstract approved: Redacted for privacy (James R. Welty) An experimental study is described

An experimental study of heat transfer to a horizontal tube in a large particle fluidized bed at elevated temperature

Creator:: George, Alan Herbert
Resource Type:: Dissertation
Full Text:: Departm t of Mechanical En neering Redacted for privacy Dean of Gradua e School Date thesis is

An experimental investigation of natural convection heat transfer from an array of uniformly heated vertical cylinders to mercury

Creator:: Dutton, Jonathan Craig
Abstract:: An experimental investigation was conducted for natural convection heat transfer in an array of uniformly heated vertical cylinders in mercury. The test section consisted of seven electrically heated cylinders of 1.365 inch diameter and 3.825 inch heated length arranged in an equilateral triangular pattern. In order to preclude side flow...
Resource Type:: Masters Thesis
Full Text:: Mechanical E gineering Redacted for privacy Dean of Graduate School Date thesis is presented ,427 /27

Low and high temperature mechanical properties of annealed zirconium

Creator:: Jackson, Harry James
Resource Type:: Masters Thesis
Full Text:: zirconium LOW AND HIGH TEMPERATURE IvllCHANICAL PROPERTIES OF ANNEED ZIRCONIUM by HARRY JAMES JACKSON

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

A numerical model of drop-on demand droplet formation from a vibrating nozzle and a rigid nozzle

Creator:: Yang, Guozhong
Abstract:: Droplet formation from a rigid and a vibration nozzle driven by a pulsing pressure is simulated. Droplet formation is simulated by using one-dimensional model. For the case of droplet formation from a vibration nozzle, the nozzle vibration is simulated by large deflection plate vibration equation. Droplet formation from a rigid...
Resource Type:: Masters Thesis
Full Text:: coefficient D: Bending rigidity E: Young's modulus F: Airy stress function G: Radius amplification factor

An experimental study of radiative and total heat transfer between a high temperature fluidized bed and an array of immersed tubes

Creator:: Lei, David Hsien-Yu
Abstract:: Experimental data are reported for the time-averaged local radiative and total heat transfer coefficients for both an array of horizontal tubes as well as a single horizontal tube immersed in a large-particle fluidized bed at elevated temperatures. Spatial-averaged heat transfer coefficients computed from the local values, using a simple trapezoidal...
Resource Type:: Dissertation
Full Text:: James R. Welty Experimental data are reported for the time-averaged local radiative and total heat

Experimental and analytical characterization of bidirectional reflectance data for engineering materials

Creator:: Zaworski, Joseph Robert
Abstract:: Bidirectional reflectance is a fundamental property used for the analysis of radiative heat transfer. It is a form of reflectivity in which the spectral and directional dependencies of both the beam incident on a surface and the beam reflected from the surface are specified. A new system has been designed...
Resource Type:: Dissertation
Full Text:: Abstract Approved: /James R. Welty Bidirectional reflectance is a fundamental property used for the

Heat and mass transfer rates associated with the drying of Southern pine and Douglas fir veneer in air and in steam at various temperatures and angles of impingement

Creator:: Laity, Walter William
Abstract:: Southern pine and Douglas fir veneer samples were dried in air under the following conditions: air temperatures were 350, 600, and 750°F; air velocities were 50, 100, and 150 feet per second, and angles of impingement of air against the veneer surfaces were 0°, 45°, and 90°. The resulting drying...
Resource Type:: Masters Thesis
Full Text:: in Air and in Steam at Various Ternpertures ap.d 4ngles of Im Abstract approved: James R. Wlty

Heat transfer in the splash-zone of a high temperature fluidized bed

Creator:: Pidwerbecki, David
Resource Type:: Dissertation
Full Text:: Temperature Fluidized Bed Abstract approved: c}t V James R. Welty Experimental results and a predictive

Effect of PZT driving waveform and frequency on meniscus shape and dropon-demand droplet formation parameters

Creator:: Yang, Guozhong
Abstract:: For piezoelectric stack (PZT) driven droplet generator, the driving waveform and driving frequency effect on liquid filament shape and droplet characteristics have been experimentally studied. The experimental study was based on a PZT driven droplet generator with known geometric design parameters and working fluid properties. A lumped-element-model (LEM) constructed to...
Resource Type:: Dissertation
Full Text:: : _________________________________________________ James A. Liburdy For

An experimental study of friction factors and mixed convection in the thermal entrance region of vertically narrow, horizontal rectangular channels for different heating conditions and aspect ratios

Creator:: Hong, Seung-Ho
Abstract:: Heat transfer and fluid mechanical behavior of water flowing horizontally in vertically-narrow rectangular channels was studied in this work. Friction factor and Nusselt number variations were determined experimentally for four different wall heating conditions, and for aspect ratios(height to width) of 5, 4, 3, 2, and 1. Wall heating conditions...
Resource Type:: Dissertation
Full Text:: reps seSting Mecha ical Engineering Head of Department of Mechanical Engineering Dean of Gradu e of

Dislodgement and deformation of microbubbles in laminar channel flow

Creator:: Tence, David A.
Abstract:: In this thesis the critical parameters involved in the dislodgement and deformation of microbubbles in laminar channel flow, are determined and evaluated. Experimentally the effects of surface tension, viscosity, fluid flow rate, density, and bubble diameter on bubble dislodgement were evaluated. A theoretical scale analysis was performed which provided a...
Resource Type:: Masters Thesis
Full Text:: Laminar Channel Flow Abstract approved: Redacted for Privacy James R. Welty In this thesis the

Microstructures and properties of Nb/Ti multilayered thin films

Creator:: Faase, Kenneth James
Resource Type:: Dissertation
Full Text:: films AN ABSTRACT OF THE THESIS OF Kenneth James Faase for the degree of Doctor of Philosophy in

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:: Microchannels and Fractal-like Branching Microchannels Abstract approved: James A

Effects of orifice geometry and surface boundary condition on heat transfer of impinging jet array

Creator:: Kanokjaruvijit, Koonlaya.
Abstract:: The effects of the orifice geometry and the surface boundary condition on the heat transfer distribution to a flat surface of an impinging jet array were investigated. The jet array impinged normally onto the surface which was either isothermal or had a uniform heat flux. The experiments were performed for...
Resource Type:: Masters Thesis
Full Text:: , Abstract approved: James A. Liburdy 0 The effects of the orifice geometry and the surface boundary

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:: : _______________________________________________________ James A. Liburdy In-situ vapor extraction is performed by applying a pressure differential

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:: CALCULATION ..................................... 113 APPENDIX E. FLOW CONDITIONS

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:: Abstract approved: ________________________________________________________________________ James A

A study of laser processed intermetallics

Creator:: Roub, Evangeline R.
Abstract:: The effects of laser processing of Ni₃Al, TiAl, Fe₃Al, and Ni₃Si on microstructure and phase composition were characterized using optical and scanning electron microscopy and X-ray diffraction analysis. It was found that laser processing resulted in melt zones of ordered phases with fine grains and microstructures. The effects of heat...
Resource Type:: Masters Thesis
Full Text:: Approved: Redacted for Privacy James C. Rawers l The effects of laser processing of Ni3A1, TiAl, Fe3A1

An experimental study of fluid flow and heat transfer in rectangular microchannels

Creator:: Popescu, Aristotel
Resource Type:: Dissertation
Full Text:: Flow and Heat Transfer in Rectangular Microchannels. Abstract approved: James R. This thesis reports

Radiation from an infinite plane to parallel rows of infinitely long tubes - hottel extended

Creator:: Qualey, Douglas L.
Abstract:: A two-dimensional model for predicting the rate of radiation heat transfer for the interior of an industrial furnace is described. The model is two-dimensional due to the assumptions of the heat source as an infinite radiating plane and the heat sink as rows of parallel tubes that are both infinite...
Resource Type:: Masters Thesis
Full Text:: 11 Row 2 ) 0 0 0 04 0 0 0 0 /j/;;10 I I / e Row 1' / Projection for Fp1 I I .R = 1

Space heating with electric radiant panels

Creator:: Culbertson, James Francis
Resource Type:: Masters Thesis
Full Text:: WITH ELECTRIC RADIANT PANELS by JAMES FRANCIS CULBERTSON A THESIS submitted to OREGON STATE

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:: approved: _____________________________________________________________________ James A. Liburdy

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:: EXPERIMENTAL INVESTIGATION OF TRANSITION POOL BOILING Abstract approved: Redacted for Privacy James 1 Welty

Micro-bubble dynamics in two-phase flow through a micro-channel

Creator:: Shepard, Thomas G.
Abstract:: An experimental investigation into the behavior of micro-bubbles flowing through a micro-channel has been conducted. Experiments were performed within a rectangular micro-channel with dimensions of 5 cm x 13.2 mm x l30 jim. Bubbles were generated in an electrolyte solution by electrolysis at the lower channel wall near the inlet....
Resource Type:: Masters Thesis
Full Text:: Dynamics in Two-Phase Flow Through a Micro-channel. Abstract approved: James A. Liburdy An experimental

On design and field evaluation of the noise control features of the Lake Oswego water treatment plant

Creator:: Reeder, Harry Cromwell
Abstract:: Concern about noise pollution has swept the country. People are conscious of their environment and are trying to preserve or to improve it. When the City of Lake Oswego selected a site for their water treatment plant, they had to assure the neighbors that it would not increase the ambient...
Resource Type:: Masters Thesis
Full Text:: '. james IR. Welty Concern about noise pollution has swept the country. People are conscious of their

Economics of personal airplane operation

Creator:: Skinner, William James
Resource Type:: Masters Thesis
Full Text:: PERSONAL AIRPLANE OPERATION by 1LLIAM JAMES SKINNER A TIiESI5 submitted to the EGON STA COLUÎGE

Fracture toughness of void-site-filled skutterudites

Creator:: Eilertsen, James S.
Abstract:: Thermoelectric materials are playing an increasingly significant role in the global effort to develop sustainable energy technologies. Consequently, the demand for materials with greater thermoelectric efficiency has stimulated the development of state-of-the-art interstitially doped skutterudite-based materials. However, since intermetallics are often embrittled by interstitial substitution, optimal skutterudite-based device design, manufacture,...
Resource Type:: Masters Thesis
Full Text:: ABSTRACT OF THE THESIS OF James S. Eilertsen for the degree of Master of Science in Mechanical

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:: Diffusion in Silicon. Abstract approved: James A. Van Vechten The self-interstitial defect is commonly

Natural convection cooling of vertical plates in an enclosure : a numerical simulation

Creator:: Destremau, Axel
Resource Type:: Masters Thesis
Full Text:: I would like to thank very much my major professor, Dr. James R. Welty, for his constant

Effects of a thin, flexible nozzle on droplet formation and impingement

Creator:: Hawke, Shane R.
Abstract:: The droplet formation process in the vicinity of the nozzle exit and the behavior of a spreading droplet during impingement on a smooth glass surface were studied. Two nozzle geometries were tested. The first case was a stiff stainless steel nozzle plate 0.787 mm thick. The second case was a...
Resource Type:: Masters Thesis
Full Text:: : _____________________________________________________________________ James A. Liburdy The droplet formation process in the vicinity of the nozzle exit and the

Volumetric receiver development : a heat transfer and design evaluation of an advanced air heating solar thermal central receiver concept

Creator:: Drost, M. K.
Abstract:: The volumetric receiver is an advanced solar central receiver concept designed to produce high temperature air. This document presents the results of a heat transfer and performance evaluation of the volumetric receiver concept. The volumetric receiver consists of an array of ceramic fins or fibers arranged in concentric rows around...
Resource Type:: Dissertation
Full Text:: James K. Welty The volumetric receiver is an advanced solar central receiver concept designed to

The geometric characterization and thermal performance of a microchannel heat exchanger for diesel engine waste heat recovery

Creator:: Yih, James S.
Abstract:: Rising energy demands and the continual push to find more energy efficient technologies have been the impetus for the investigation of waste heat recovery techniques. Diesel engine exhaust heat utilization has the potential to significantly reduce the consumption of fossil fuels and reduce the release of greenhouse gases, because diesel...
Resource Type:: Masters Thesis
Full Text:: James S. Yih for the degree of Master of Science in Mechanical Engineering presented on November 29

Experimental Investigations of the Unsteady Aerodynamics of Oscillating Airfoils Operating in the Energy Harvesting Regime

Creator:: Siala, Firas F.
Abstract:: The rising global trend to reduce dependence on fossil fuels has provided significant motivation toward the development of alternative energy conversion methods and new technologies to improve their efficiency. Recently, oscillating energy harvesters have shown promise as highly efficient and scalable turbines, which can be implemented in areas where traditional...
Resource Type:: Dissertation
Full Text:: Harvesting Regime Abstract approved: James A. Liburdy The rising global trend to reduce dependence on

A qualitative study of recirculation in cooling towers

Creator:: Riggs, James Lear
Resource Type:: Masters Thesis
Full Text:: QUALITATIVE STUDY OF RECIRCULATION IN COOLING TOWERS by JAMES LTAR RIGGS A THESIS submitted to

Influence of environmental factors on human mental and motor performance in console operations

Creator:: Riggs, James Lear
Resource Type:: Dissertation
Full Text:: motor performance in console operations AN ABSTRACT OF THE THESIS OF James Lear Riggs for the Ph. D

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:: Characteristics of Oscillatory Surface Instabilities Leading to Droplet Formation. Abstract Approved: James A

High-pressure steam service for O.S.C. Engineering Laboratory

Creator:: Lynch, James Edward
Resource Type:: Masters Thesis
Full Text:: ~-for the_M.... .a._ in Ke5th&n.1c.l.l~e~i.ng Date Thesis is presented_ Maz.l5.,_ l.9.Q.3___________

Study of creeping, inertial and turbulent flow regimes in porous media using particle image velocimetry

Creator:: Patil, Vishal A.
Abstract:: Porous media flows are encountered in many natural and man-made systems such as gas adsorption, filtration, heat exchangers, combustion, catalytic reactors and groundwater hydrology. This study experimentally investigates these flows as function of pore Reynolds number, Re[subscript pore]. The pore Reynolds number is based on the porous bed hydraulic diameter,...
Resource Type:: Dissertation
Full Text:: : _______________________________________________________ James A. Liburdy Porous media flows are encountered in many natural and man-made systems

Predicting Aerodynamic Loads on Highly Flexible Membrane Wings

Creator:: Carpenter, Trenton James
Abstract:: Through passive adaptation to incidental flow, flexible aerodynamic surfaces exploit effects of increased lift, delayed stall and disturbance rejection. Wings of birds, bats, and insects exhibit these passive effects, and at the same time through the use of structural state feedback sensed from the loads on the wing, active control...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Trenton James Carpenter

Experimental Design Approach for Evaluation of Airfoil-Driven Energy Harvesting

Creator:: Strahl, Jordan D.
Abstract:: An experimental setup has been partially developed to investigate the impact of an actively controlled trailing edge component upon the energy harvesting performance of an oscillating airfoil in a pitching and heaving regime. While previous and current efforts have and continue to function to characterize the performance of such a...
Resource Type:: Honors College Thesis
Full Text:: . Abstract approved: _____________________________________________________ James Liburdy An

Stress-corrosion cracking susceptability of zirconium in ferric-chloride solution

Creator:: Dunham, James Tallus
Resource Type:: Masters Thesis
Full Text:: SOLUTION by JAMES TALLUS DUNHAM A THESIS submitted to OREGON STATE COLLEGE in partial

An investigation of domestic oil heating with special emphasis on warm-air furnaces

Creator:: Kollas, Wilhelm James
Resource Type:: Masters Thesis
Full Text:: : a) E ai w 1. 0P Q I, J 'J I) t- I- a Gravity I r - r-- r 5Q------ 4

Micromechanics of heterogeneous materials under compressive loading

Creator:: Laird, George
Abstract:: In mining and mineral processing, compressive loading is often encountered during the comminution of ore bearing minerals and in the wear resistant materials used in the comminution circuit. A common thread joining many of the materials that are primarily used under compressive loading is the presence of a high modulus...
Resource Type:: Dissertation
Full Text:: would also like to thank Drs. Charles E. Smith, Michael E. Kassner, James C. Rawers, and William C

Radiation Emissions from Turbulent Diffusion Flames Burning Large Hydrocarbon Fuels

Creator:: Zeuthen, Eric D.
Abstract:: The purpose of this study is to measure and compare radiation emissions from flames burning large hydrocarbon fuels to assist in understanding how the molecular composition changes radiation emissions. Radiative heat transfer is significant because it is a primary mode of heat transfer for many combustion devices. This study also...
Resource Type:: Masters Thesis

Proportional integral derivative control of an oil-heated fractal-like branching microchannel desorber

Creator:: Davis, Keith R.
Abstract:: A PID controller was designed to control the performance of an oil-heated fractal-like branching microchannel desorber for use in an ammonia-absorption refrigeration system. Both the amount and concentration of ammonia refrigerant generated at the desorber can be controlled by choosing the rectified circulation ratio as the controlled variable in a...
Resource Type:: Masters Thesis
Full Text:: changing operating conditions from A→E ......................... 80 5.15: Robustness test changing

Spatio – temporal temperature variations during droplet impingement evaporation : effects of nanofluid and nano-structured surface

Creator:: Graber, Christof
Abstract:: Droplet and spray impingement cooling are typically used in high heat flux thermal management. In this thesis, droplet impingement and evaporation heat transfer characteristics are determined from measured spatially- and temporally- varying fluid and surface temperatures. Unique to this study is the documentation of the effects of using a nanofluid...
Resource Type:: Masters Thesis
Full Text:: Narayanan, and Dr. James Liburdy for their continual support and assistance in completing this research. A

RANS and LES predictions of turbulent scalar transport in dead zones of natural streams

Creator:: Drost, Kevin J.
Abstract:: Natural stream systems contain a variety of ﬂow geometries which contain ﬂow separation, turbulent shear layers, and recirculation zones. This work focuses on streams with dead zones. Characterized by slower ﬂow and recirculation, dead zones are naturally occurring cutouts in stream banks. These dead zones play an important role in...
Resource Type:: Masters Thesis
Full Text:: APPENDICES Page A k-ω Equations 79 B Uijttewaal Grids 81 C Weitbrecht Grids 82 D Single Grid 83 E LES

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