Index Catalog // ScholarsArchive@OSU

Analysis of spillway hydrodynamics for total dissolved gas prediction downstream of hydropower projects with free, plunging spillway jets

Creator:: Germann, Nathan A.
Abstract:: During spring and early summer hydropower projects are often forced to spill water through their spillways due to increased river flows of the runoff season. Flows which are directed through spillways--instead of through turbines--contain a substantial amount of energy. Stemming from the high energy content, spillway flows entrain air at...
Resource Type:: Masters Thesis
Full Text:: Nathan A. Germann for the degree of Master of Science in Mechanical Engineering presented on October 2

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

Freeze Stage Analysis of an Indirect Freeze Desalination System

Creator:: Whitaker, Trevor A.
Abstract:: Freeze desalination poses as a potential solution to many of the issues that accompany current desalination methods. The research detailed in this manuscript involves creating and analyzing a numerical model of the freezing operation of an indirect contact freeze-melting (FM) desalination system. In this initial analysis, pure water is frozen...
Resource Type:: Honors College Thesis
Full Text:: System Abstract Approved: Deborah V. Pence Thermal-Fluid Sciences Freeze desalination poses as a

An experimental study of co-flow ammonia-water desorption in an oil-heated, microscale, fractal-like branching heat exchanger

Creator:: Mouchka, Gregory A.
Abstract:: An experimental study was performed in which an ammonia-water solution was desorbed within a branching fractal-like microchannel array. The solution entered in the center of a disk, and flowed out radially until discharging in to a gravity-driven separation chamber. Heat was added to the ammonia-water through a thin wall, above...
Resource Type:: Masters Thesis
Full Text:: AN ABSRTACT OF THE THESIS OF Gregory A. Mouchka for the degree

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

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:: gratitude to Dr. James A. Liburdy, my advisor, and Dr. Deborah V. Pence, my committee member, for the

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:: v in g A m p lit u d e ( m ) 0 1 2 3 4 5 6 7 -20 0 20 P it c h in g A m p lit u

Experimental study of impulse turbines and permanent magnet alternators for pico-hydropower generation

Creator:: Cobb, Bryan R.
Abstract:: Increasing access to modern forms of energy in developing countries is a crucial component to eliminating extreme poverty around the world. Pico-hydro schemes (less than 5-kW range) can provide environmentally sustainable electricity and mechanical power to rural communities, generally more cost-effectively than diesel/gasoline generators, wind turbines, or solar photovoltaic systems....
Resource Type:: Masters Thesis
Full Text:: inside diameter, and v is the water velocity (through the pipe). The mean velocity of the water in a

Reliability Analysis of a Freeze Desalination System

Creator:: Boschetti Tofano, Francisco A.
Abstract:: The unsustainable use of fresh water sources and unavailability of fresh water in certain parts of the world have created a demand for water desalination systems. Desalination methods are effective at producing consumable water, but often require large scale setups, high energy consumption, and careful maintenance. A team of students...
Resource Type:: Honors College Thesis
Full Text:: of a Freeze Desalination System by Francisco Alberto Boschetti Tofano A

Modelling Thin Liquid Film Draining of Bubbles on Porous Media in Confined Geometry

Creator:: Bahm, Jared S.
Abstract:: The behavior of the thin liquid ﬁlm formed between a bubble and hydrophobic membrane is of high interest in applications where separating two-phase mixtures is beneﬁcial. One such application is in-situ vapor extraction heat sinks. In these systems, high heat transfer rates are accomplished by taking advantage of the high...
Resource Type:: Masters Thesis
Full Text:: rate [m 3/s] V̇ volumetric flow rate [m3/s] A area [m2] Ca capillary number Ca ≡ µv0/σ D diameter

ScholarsArchive@OSU

Analysis of spillway hydrodynamics for total dissolved gas prediction downstream of hydropower projects with free, plunging spillway jets

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

Freeze Stage Analysis of an Indirect Freeze Desalination System

An experimental study of co-flow ammonia-water desorption in an oil-heated, microscale, fractal-like branching heat exchanger

Microscale thermal management using membrane vapor extraction

Modeling in-situ vapor extraction during flow boiling in microscale channel

Lift and drag characteristics of flexible pitching and heaving wings

Experimental study of impulse turbines and permanent magnet alternators for pico-hydropower generation

Reliability Analysis of a Freeze Desalination System

Modelling Thin Liquid Film Draining of Bubbles on Porous Media in Confined Geometry

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