Index Catalog // ScholarsArchive@OSU

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:: ................................................................................43 5.12 Flow characteristics: (a) droplet volume, (b) velocity, and (c) break-off time versus σ

Mechanical characterization of a simple gel in a prototype device that models a degenerative intervertebral disc

Creator:: Cenar, Yannick
Abstract:: A large part of low-back pain occurrences are due to disc herniation or prolapse of the nucleus pulposus. An alternative technique to existing treatments of low back pain includes nucleus pulposus replacement by an artificial material to relieve pain and restore normal function. To date, there has been a deficiency...
Resource Type:: Masters Thesis
Full Text:: MECHANICAL CHARACTERIZATION OF A SIMPLE GEL IN A

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

Creator:: Lovejoy, Steven C.
Abstract:: A need exists to develop a non-destructive testing technique that can identify the formation and propagation of diagonal tension cracks in conventionally steel reinforced concrete deck girder (RCDG) highway bridges in the State of Oregon. Such a technique could be included into a structural health monitoring (SHM) system installed on...
Resource Type:: Dissertation
Full Text:: : Timothy C. Kennedy A need exists to develop a non-destructive testing technique that can identify

Mixed reactant single chamber fuel cell, using products generated from the electrolysis of an aqueous electrolyte

Creator:: Jost, William C.
Abstract:: A Mixed Reactant Single Chamber (MRSC) Fuel Cell is a relatively recent concept in the field of fuel cell engineering originally developed in the late 1950’s. Typical fuel cells have separated reactants (a separated fuel and oxidizer) that react on their usually non-selective electro-catalytic materials. A mixed reactant fuel cell...
Resource Type:: Masters Thesis
Full Text:: Electrolysis of an Aqueous Electrolyte by William C. Jost A THESIS Submitted

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:: SolidWorks drawing . . . . 96 C.1 Droplet formation for the stiff nozzle, waveform A (0 - 7.5 ms

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:: ) three-pulse waveform A; (b) three-pulse waveform B; (c) two- pulse waveform; (d) square waveform

Nonlinear model reduction using the group proper orthogonal decomposition method

Creator:: Dickinson, Benjamin T.
Abstract:: Proper orthogonal decomposition (POD) in conjunction with the Galerkin projection has been used as a model reduction technique for the tractable real-time control of high-dimensional systems. While POD based model reduction may improve the tractability of high-dimensional models, the nonlinear POD based model may be impractical for control due to...
Resource Type:: Masters Thesis
Full Text:: Using the Group Proper Orthogonal Decomposition Method Abstract approved: Belinda A. Batten Proper

Design and preliminary characterization of thermally-actuated pumps utilizing Marangoni and Leidenfrost effects

Creator:: Sedler, Stephen Joseph
Abstract:: Design and preliminarily characterization of two thermally-actuated pumps is presented in this thesis. The unique feature of both pumps is the presence of periodic asymmetrical structures on the channel walls. Two heat transfer effects are used with surface asymmetry to generate forces that drive the fluid in a preferential direction...
Resource Type:: Honors College Thesis
Full Text:: Stephen Joseph Sedler A PROJECT submitted to Oregon State University University Honors College

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:: flow was 2 to 3 ˚C below the saturation temperature (subcooled) with a constant energy input of 8.5 W

Characterization of the near-field flow structure of an acoustically self-excited jet in a large enclosure using particle image velocimetry (PIV)

Creator:: Tobias, Jason A.
Abstract:: An experimental study of the near-field flow structure produced by an incompressible turbulent Acoustically Self-Excited Jet (ASEJ) in a large enclosure using Particle Image Velocimetry (PIV) is presented. The salient feature of this jet is that it provides an increase in near-field mixing and turbulence without additional external power input....
Resource Type:: Masters Thesis
Full Text:: • • ............................................................................ 58 6.13: Whole field streamwise variation of U/Ue - (a) unexcited jet, (b) first stage ASEJ, (c

ScholarsArchive@OSU

Numerical study of droplet formation with nozzle dynamics and multiple droplet impingement

Mechanical characterization of a simple gel in a prototype device that models a degenerative intervertebral disc

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

Mixed reactant single chamber fuel cell, using products generated from the electrolysis of an aqueous electrolyte

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

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

Nonlinear model reduction using the group proper orthogonal decomposition method

Design and preliminary characterization of thermally-actuated pumps utilizing Marangoni and Leidenfrost effects

Microscale thermal management using membrane vapor extraction

Characterization of the near-field flow structure of an acoustically self-excited jet in a large enclosure using particle image velocimetry (PIV)

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