Index Catalog // ScholarsArchive@OSU

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

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

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

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:: AN ABSTRACT OF THE THESIS OF Mario A

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:: Deborah V. Pence A PID controller was designed to control the performance of an oil-heated fractal

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

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:: ABSTRACT OF THE THESIS OF Jason A. Tobias for the degree of Master of Science in Mechanical Engineering

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:: AN ABSTRACT OF THE THESIS OF Mario A. Apreotesi for the

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:: ABSTRACT OF THE DISSERTATION OF Jason A. Kyle for the degree of Doctor of Philosophy in Mechanical

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

Creator:: Woodside, Rigel
Abstract:: The behavior of a metal vapor plasma arc in a vacuum arc remelting (VAR) furnace is believed to contribute to the formation of defects in reactive metal and super-alloy ingots. Industry standard instrumentation, which includes electric current and voltage measurements, can asses the stability of an arc but cannot predict...
Resource Type:: Masters Thesis
Full Text:: previously published work by Ward is items 2b and 2c. Indeed it is shown that a single sensor can

ScholarsArchive@OSU

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

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

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

Microscale thermal management using membrane vapor extraction

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

Nonlinear model reduction using the group proper orthogonal decomposition method

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

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

Optimal soaring by a small autonomous glider

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

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