Index Catalog // ScholarsArchive@OSU

A Framework to Evaluate the Risk of Human- and Component-related Vulnerability Interactions

Creator:: Irshad, Lukman
Abstract:: Most accidents and malfunctions in complex engineered systems are attributed to human error. However, a closer inspection would reveal that such mishaps often emerge as a result of poor design and human- and component-related vulnerabilities acting together. To fully understand and mitigate potential risks, the effects of such interactions between...
Resource Type:: Dissertation
Full Text:: Interactions Abstract approved: H. Onan Demirel Irem Y. Tumer Most accidents and malfunctions in complex

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:: solver forward time advancement. At any simulation time t that is a multi- ple of h, the forward time

Biaxial fatigue behavior of commercially pure titanium Ti-50A (Grade 2) and low-alloy titanium Ti-Code 12 (Grade 12) heat exchanger materials

Creator:: Tobias, Benjamin C.
Abstract:: Material failures in heat exchangers are often closely tied to events associated with the conditions of service and operating parameters. These events can generally be attributed to adverse load application and higher than optimum operating temperatures that could lead to changes in the microstructure of the materials and fatigue failure...
Resource Type:: Dissertation
Full Text:: designated as A and B as visualized in Mohr's circle with (T)h < (T)B. (T) = (T) Applied torsional stress T

Computational Study of Smoldering Combustion in Cellulose and Hemicellulose Mixtures

Creator:: Mulky, Tejas Chandrashekhar
Abstract:: Due to global warming wildland fires are increasing in frequency and severity. In the case of wildland fires, the major modes of combustion occur include smoldering combustion and flaming combustion. Smoldering combustion occurs most commonly in porous fuels like peat, forest duff, and woody fuels, which are available in abundance...
Resource Type:: Masters Thesis
Full Text:: (c, k, ρwet, and ∆H) was changed to its value for 70% moisture content while holding all other

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:: an incoming wave, and can be seen in the literature as the shorter abbreviation H(ω) as well. That is

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:: , my labmates Chaitanye Ghodke and Justin Finn, my masters thesis committee: Dr. Merrick Haller, Dr

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:: , Prof. Chad Higgins and Prof. Merrick Haller for taking the time out to read this thesis, evaluate and

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:: of H=0.15m, H=0.30m and H=0.45m

Hydroelastic modeling of a wave energy converter using the arbitrary Lagrangian-Eulerian finite element method in LS-DYNA

Creator:: Meicke, Stephen A.
Abstract:: This thesis investigates the applicability of the finite element method to model wave energy converter (WEC) hydroelasticity using LS-DYNA. The proposed methodology uses the Arbitrary Lagrangian-Eulerian formulation to model Fluid-Structure Interaction (FSI) between the WEC and the fluid elements. This formulation allows for time-domain modeling of higher order effects such...
Resource Type:: Masters Thesis

Learning based methods applied to the MAV control problem

Creator:: Salichon, Max
Abstract:: This thesis addresses Micro Aerial Vehicle (MAV) control by leveraging learning based techniques to improve robustness of the control system. Applying classical control methods to MAVs is a difficult process due to the complexity of the control laws with fast and highly non-linear dynamics. These methods are mostly based on...
Resource Type:: Dissertation
Full Text:: Robert Paasch, Dr Mike Bailey, and Dr Merrick Haller for their time and patience throughout this

ScholarsArchive@OSU

A Framework to Evaluate the Risk of Human- and Component-related Vulnerability Interactions

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

Biaxial fatigue behavior of commercially pure titanium Ti-50A (Grade 2) and low-alloy titanium Ti-Code 12 (Grade 12) heat exchanger materials

Computational Study of Smoldering Combustion in Cellulose and Hemicellulose Mixtures

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

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

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

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

Hydroelastic modeling of a wave energy converter using the arbitrary Lagrangian-Eulerian finite element method in LS-DYNA

Learning based methods applied to the MAV control problem

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