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Numerical And Experimental Evaluation Of Preheated Premixed Flames At Lean And Rich Conditions, Joseph Edward Gibson
Numerical And Experimental Evaluation Of Preheated Premixed Flames At Lean And Rich Conditions, Joseph Edward Gibson
LSU Master's Theses
Preheating a combustible mixture enhances the laminar burning flux characteristic mad with high reaction firing rates. As a result, the flammable zone as defined by inlet conditions of equivalence ratio and temperature is expanded beyond that available at standard ambient conditions; however, fundamental questions in these combustion regimes have not been addressed. In this thesis, preheated lean and rich combustion of methane/air mixtures is studied numerically and experimentally to catalog and confirm expected trends in these regimes. Numerical simulations were completed using both GRI-Mech 3.0 and San Diego mechanisms in the combustion code Cantera. An adiabatic simulation data set …
Biodegradation And Distribution Of Crude Oil Sampled At Fourchon Beach, Kendall Ray Lemelle
Biodegradation And Distribution Of Crude Oil Sampled At Fourchon Beach, Kendall Ray Lemelle
LSU Master's Theses
This study was developed to determine the distribution and fate of crude oil spilled from the Deepwater Horizon oil rig starting on April 24, 2010. Crude oil from this spill contaminated portions of Fourchon Beach, Louisiana which was the study site for this thesis. Understanding the fate processes that affect crude oil once it’s released is important because the compounds that comprise oil can be hazardous to humans and wildlife. Composite and small surface residual ball (SSRB) samples were collected from the supratidal zone of Fourchon Beach and analyzed for PAHs and alkanes. Alkane concentrations decreased significantly over time, while …
Laboratory Evaluation Of Geosynthetics To Stabilize/Reinforce The Subgrade/Base In Unpaved Roadways, Imran Akond
Laboratory Evaluation Of Geosynthetics To Stabilize/Reinforce The Subgrade/Base In Unpaved Roadways, Imran Akond
LSU Master's Theses
This research study evaluates the performance of geosynthetic material for subgrade stabilization and base reinforcement of unpaved test sections. For this purpose, extensive large-scale in-box static plate load tests were conducted on several unreinforced and geosynthetic reinforced, unpaved test sections. This research was conducted in Geotechnical Engineering Research Laboratory (GERL) at Louisiana Transportation Research Center (LTRC). The in-box static plate load tests (ASTM D1196-93) were conducted to evaluate the performance and benefits of geosynthetic material for subgrade stabilization/base reinforcement. A total of forty-seven tests were performed in this regard. The quality control of the section was maintained using non-destructive in-situ …
Growth Rate And Productivity Of A Louisiana Native Microalgae/Cyanobacteria Co-Culture: Feasibility For Use In Industrial Biotechnology Applications, Athens Gomes Silaban
Growth Rate And Productivity Of A Louisiana Native Microalgae/Cyanobacteria Co-Culture: Feasibility For Use In Industrial Biotechnology Applications, Athens Gomes Silaban
LSU Master's Theses
Interest in biofuels research has increased in the era of uncertainty of the current fossil fuel sustainability and global climate concerns. Microalgae offer advantages over terrestrial plants as a potential source of biomass-based fuel. In this study, a Louisiana native microalgae/cyanobacteria (Chlorella vulgaris/Leptolyngbya sp.) co-culture was examined to provide foundational information of its growth conditions. Batch studies were conducted to determine optimum nitrogen and irradiance level that yields maximum co-culture biomass growth and productivity under aerated and non-aerated conditions. The optimum nitrogen level was 2.94 mM N and the optimum initial scalar irradiance range was between 400 – 800 µmol …
Electric Elevator Drive With Position Control, Peter James Ford
Electric Elevator Drive With Position Control, Peter James Ford
LSU Master's Theses
This thesis is a study on the implementation of an elevator’s position-controlled electric drive. The information contained within this paper serves as a framework to expand the usefulness of electric drives through the addition of digital control systems and switching power supplies. The tangible example of an elevator driven by a permanent-magnet DC motor is used for this paper so that students may relate to the work and apply it to their future projects. The tasks to be accomplished in order to achieve an electric elevator drive with position control are: determining the parameters of the permanent-magnet DC motor, designing …
Low-Order Modeling Of Micro-Flier Impact With Thin Stationary Energetic Targets, Mark B. Fry
Low-Order Modeling Of Micro-Flier Impact With Thin Stationary Energetic Targets, Mark B. Fry
LSU Master's Theses
The impact of high-speed (500-1500 m/s), laser driven micro-fliers with thin energetic targets (10-100 &# 956;m) is being examined to characterize impact-induced heating and combustion of these materials. Aluminum fliers are propelled by a laser into a thin metallic target plate having a layer of energetic material deposited on its backside. Mass spectrometry is performed in vacuo on the energetic side to interrogate the shock-induced chemistry of the energetic material. It is important to ignite and possibly detonate the energetic material without perforation of the target plate avoiding contamination of the vacuum chamber. To guide development of these experiments, a …
Combinatorial Multi-Level Mold Inserts Using Micro Machining And X-Ray Lithography, Oblesh Jinka
Combinatorial Multi-Level Mold Inserts Using Micro Machining And X-Ray Lithography, Oblesh Jinka
LSU Master's Theses
The present technology advancement in biomedical, micro-electro-mechanical systems (MEMS) engineering, bio-MEMS, healthcare, etc. is driving the need to fabricate devices with multi-level, high aspect ratio and complex microstructures, which in turn requires high quality mold inserts with all these features. The present thesis is concentrated in fabricating a multi-level mold insert with complex quasi 3 dimensional micro structures with dimensions down to 10µm and aspect ratios greater than 30 using a process combination of micro milling with X-ray lithography. Therefore, in this study the main focus was to fabricate a high quality mold insert template, which can be electroplated to …
The Effect Of Elevated Water Content On Ethanol Combustion, Baine Bernard Breaux
The Effect Of Elevated Water Content On Ethanol Combustion, Baine Bernard Breaux
LSU Master's Theses
Ethanol is currently being considered as a potential alternative to traditional fuels. However, the fuel offers a low return in terms of energy output per dollar invested when compared to fossil fuels. More than 1/3 of the cost associated with bio-ethanol production is devoted to distillation and water removal. This study seeks to validate the use of hydrous ethanol as a practical fuel to be used in lieu of fossil fuels or anhydrous ethanol. Success would reduce the production cost associated with ethanol fuel. Hydrous ethanol was burned in a swirl-stabilized combustor, air is introduced at a constant flow rate …
Reductive Dechlorination Of High Concentrations Of 1,2-Dichloroethane, 1,2-Dichloropropane, And 1,1,2-Trichloroethane By Dehalogenimonas Sp., Andrew D. Maness
Reductive Dechlorination Of High Concentrations Of 1,2-Dichloroethane, 1,2-Dichloropropane, And 1,1,2-Trichloroethane By Dehalogenimonas Sp., Andrew D. Maness
LSU Master's Theses
The research goals presented here were to evaluate the solvent concentrations over which Dehalogenimonas lykanthroporepellens strain BL-DC-9T and Dehalogenimonas sp. IP3-3 are able to reductively dechlorinate 1,2-dichloroethane (1,2-DCA), 1,2-dichloropropane (1,2-DCP), and 1,1,2-trichloroethane (1,1,2-TCA). Both of these novel bacteria were isolated from contaminated groundwater at the PetroProcessors of Louisiana, Inc. Superfund site located near Baton Rouge. Both cluster in the phylum Chloroflexi, related to, but distinct from, the widely studied, reductively dechlorinating “Dehalococcoides” strains .
Although previous research demonstrated that strains BL-DC-9T and IP3-3 are able to reductively dechlorinate a variety of polyhalogenated alkanes, the solvent concentration at which the strains …
A Novel Rna Extraction Method For Cyanobacteria, Zenghui Zhang
A Novel Rna Extraction Method For Cyanobacteria, Zenghui Zhang
LSU Master's Theses
Research on production of polyhydroxyalkanoates (PHA) by microorganisms has captured attention over the last two decades, since PHA have similar properties as petroleum-based thermoplastics, yet are close to carbon neutral and made from renewable sources. Cyanobacteria are considered to be good PHA producers because of their simple nutrient requirements (mainly water, sunlight and CO2) and fast cell growth. However, knowledge of metabolisms behind PHA production by cyanobacteria is limited. Therefore, gene expression analysis of cyanobacteria is required to get a thorough understanding at the molecular level, and gene expression analysis requires the extraction of high quality RNA. Extracting high quality …
Reactive Power Considerations In Reliability Analysis Of Solar Photovoltaic Systems, Dattatray N. Gaikwad
Reactive Power Considerations In Reliability Analysis Of Solar Photovoltaic Systems, Dattatray N. Gaikwad
LSU Master's Theses
Reliability is one of the key aspects of power system operation and therefore reliability analysis techniques are well developed. However reliability analysis conventionally takes into account active power and limited attention has been given to reactive power. Reactive power is very essential in maintaining voltage stability of power systems. The voltage constraint at network can restricts active power delivery to the loads and could result in forced load curtailment. This research investigates the effect of reactive power shortage on reliability of power systems with significant penetration of PV cells. The reactive power issues become more significant in distributed generation using …
Effects Of Recycled Asphalt Shingle On The Rheological And Molecular Composition Properties Of Asphalt Cement, Saman Salari
Effects Of Recycled Asphalt Shingle On The Rheological And Molecular Composition Properties Of Asphalt Cement, Saman Salari
LSU Master's Theses
Recycling of asphalt shingles in flexible pavements has received interests in recent years due to economic, environmental, and social reasons. The objective of this study is to introduce a new approach to recycle asphalt shingles in asphalt paving construction in which RAS is ground to ultra-fine sizes and blended with asphalt binder through a wet process. In this method, the ground recycled material is blended with the binder at high temperature prior to mixing with the aggregates. Two unmodified binders that are classified as PG64-22 and PG52-28 were blended with two contrasting sources of RAS, originating from tear-off and manufacturer …
Frp Stiffener Efficiency Coefficient For Sbs Shear Strengthening Applications, Hamed Babaizadehroshanfekr
Frp Stiffener Efficiency Coefficient For Sbs Shear Strengthening Applications, Hamed Babaizadehroshanfekr
LSU Master's Theses
The use of composite materials such as Fiber Reinforced Polymer (FRP) to strengthen concrete structures has surged during the past two decades as an alternative for conventional methods of structural strengthening and repair. FRP materials are light and relatively easy to install. They are noncorrosive, durable and less vulnerable to environmental conditions in comparison to other construction and retrofitting materials. The knowledge and applications of composites for strengthening steel structures are relatively smaller when compared to concrete strengthening applications. Strengthening-By-Stiffening (SBS) is a new strengthening alternative that was developed at Louisiana State University. SBS has proven to be a practical …
Determining The Performance Of Breakwaters During High Energy Events: A Case Study Of The Holly Beach Breakwater System, Andrew Keane Woodroof
Determining The Performance Of Breakwaters During High Energy Events: A Case Study Of The Holly Beach Breakwater System, Andrew Keane Woodroof
LSU Master's Theses
Breakwaters have been constructed in many areas along Louisiana’s coastline to protect the shoreline from wave energy and erosion. During normal conditions, these breakwaters can typically be analyzed using traditional empirical methods for emergent breakwaters. However, Louisiana’s coastline is under constant threat from tropical storms and hurricanes, during which breakwaters can frequently become overtopped or submerged systems. Recent studies show that the type of shoreline response to a breakwater system may vary depending on the crest height of the breakwater in relation to the mean water level. Though emergent breakwaters typically induce sediment accretion along the shoreline, studies using laboratory …
Bacterial Dehalogenation Of Mixtures Of 1,2-Dichloroethane, 1,2-Dichloropropane, And 1,1,2-Trichloroethane By Dehalogenimonas, Jacob Laddye Dillehay
Bacterial Dehalogenation Of Mixtures Of 1,2-Dichloroethane, 1,2-Dichloropropane, And 1,1,2-Trichloroethane By Dehalogenimonas, Jacob Laddye Dillehay
LSU Master's Theses
The goal of the research presented here was to assess the ability of two bacterial strains, Dehalogenimonas lykanthroporepellens BL-DC-9T and Dehalogenimonas strain IP3-3, to reductively dehalogenate four contaminant mixtures comprised of combinations of the chlorinated solvents 1,2-dichloroethane (1,2-DCA), 1,2-dichloropropane (1,2-DCP), and 1,1,2-trichloroethane (1,1,2-TCA). Both of these bacteria were first isolated from contaminated groundwater at the PetroProcessors of Louisiana, Inc. Superfund site located near Baton Rouge, LA and are of interest because of their novel abilities to transform halogenated alkanes. In previous work (Yan et al., 2009, Bowman et al., 2012), it was demonstrated that both strain IP3-3 and D. lykanthroporepellens …
Morphology Controlled Coating Of Catalytically Active Gold Structures Within Flow-Focused Millifluidic Reactor, Chelliah V. Navin
Morphology Controlled Coating Of Catalytically Active Gold Structures Within Flow-Focused Millifluidic Reactor, Chelliah V. Navin
LSU Master's Theses
Synthesis of micro/nanomaterials within confined flow-based systems such as microfluidics has always been a promising research. However, the inability to scale up reagent volumes due to geometric constraints and pressure development within the channels at higher flow rates has limited their usage. In recent times, millifluidics has emerged as a useful technique where, apart from the synthesis, the in situ characterization of materials becomes easier. In this study, formation of morphology-controlled gold structures at different time intervals (viz. 1, 5, and 9 h) within a millifluidic chip reactor was investigated using gold chloride and dimercaptosuccinic acid (DMSA) as precursor reagents …
Base-Caged Adenosine Triphosphate As A Model System For Photoactivatable Small Interfering Rna, Amanda Yoesting Hendrix
Base-Caged Adenosine Triphosphate As A Model System For Photoactivatable Small Interfering Rna, Amanda Yoesting Hendrix
LSU Master's Theses
Photocaged adenosine triphosphate (ATP) is one of the earliest examples of exerting spatial-temporal control over the activity of a substrate. The activity of ATP is blocked until near-ultraviolet light exposure photocleaves the cage moiety. Caged ATP has been used for a myriad of applications including kinetic studies of ATP-dependent enzymes. Traditional caging of ATP occurs at the gamma-phosphate, which has been found to competitively inhibit several enzymatic systems. It was hypothesized that blocking access to the adenosine N6 position via cage molecule would prevent the initial enzyme-substrate binding event from occurring prior to photolysis, effectively minimizing competitive inhibition. Utilizing a …
Rapid Microwave Drying Of Non-Food Agricultural Feedstock For Improved Biofuel Production, Laura A. Picou
Rapid Microwave Drying Of Non-Food Agricultural Feedstock For Improved Biofuel Production, Laura A. Picou
LSU Master's Theses
Due to limited supply of traditional fossil based fuels, and increased interest in air and water quality along with other environmental concerns, there has been a rise in the utilization of biomass based energy sources. Many agricultural materials can be used for the production of biofuels, including materials that are typically underutilized such as sweet sorghum bagasse and otherwise nuisance species such as Chinese tallow tree seeds. The goal of this project was to examine the relationship between the dielectric properties of sweet sorghum bagasse and Chinese tallow tree (CTT) seeds, respectively, and frequency and moisture content; to determine pertinent …
Stabilization Of Very Weak Subgrade Soil With Cementitious Stabilizers, Sanjay Kumar Dhakal
Stabilization Of Very Weak Subgrade Soil With Cementitious Stabilizers, Sanjay Kumar Dhakal
LSU Master's Theses
To evaluate the effect of high moisture content on the performance of weak subgrade soil and improve the engineering properties of weak subgrade soil through using cementitious materials, five different soils that represent range of subgrade soil in Louisiana (based on plasticity indices) were collected and considered in this research study. All tests on raw soils and treated/stabilized soils were performed on the soil laboratory at the Louisiana Transportation Research Center (LTRC). Ordinary Portland cement and hydrated lime were selected in this study to treat/stabilize the subgrade soils depending upon the soil type and plasticity index. The repeated load triaxial …
Factors Controlling Macondo Oil Biodegraqdation On A Rapidly Eroding Coastal Headlands Beach, Marilany G. Urbano
Factors Controlling Macondo Oil Biodegraqdation On A Rapidly Eroding Coastal Headlands Beach, Marilany G. Urbano
LSU Master's Theses
Fourchon Beach, located along the southeast Louisiana coast, was affected by the oil leaking from the British Petroleum’s Deepwater Horizon Oil rig explosion in 2010. The oil, labeled MC252 oil, came ashore in a stable emulsion form, contaminating the sand, salt pan, marsh and mangroves along the beach. A unique oil form, labeled SSRB (small surface residue ball) was formed from the MC252 oil and a combination of environmental factors. The SSRB is an aggregate of sand and emulsified oil, and forms a large portion of the oil still present on the supratidal zone of Fourchon Beach. SSRBs have not …
Numerical Study Of Laterally Loaded Batter Pile Groups With The Application Of Anisotropic Modified Cam-Clay Model, Yida Zhang
LSU Master's Theses
This study presents a series of numerical studies of laterally loaded batter pile groups based on data of the full-scale lateral load test on M19 eastbound pier foundation of the new I-10 Twin Span Bridge, Louisiana. The numerical studies include several continuum-based 3D finite element analyses on batter/vertical pile/pile groups and a FB-MultiPier analysis of the pile foundation. The Anisotropic Modified Cam Clay Model, has been implemented into UMAT and applied for describing clay behavior in all FE models. The explicit substepping scheme with modified Euler algorithm is selected to implement the model in ABAQUS software. The resultant UMAT shows …
Evaluation Of Methods To Operate Gate Valves Using Elapsed Time, Rating Of Perceived Exertion, And Electromyography, Francis Williams Hutchinson
Evaluation Of Methods To Operate Gate Valves Using Elapsed Time, Rating Of Perceived Exertion, And Electromyography, Francis Williams Hutchinson
LSU Master's Theses
Hutchinson, Francis Williams, B.G.S., Louisiana State University, 1989 Master of Science in Industrial Engineering, Summer Commencement, 2012 Major: Industrial Engineering Evaluation Of Methods To Operate Gate Valves Using Elapsed Time, Rating Of Perceived Exertion, And Electromyography Thesis directed by Professor Fereydoun Aghazadeh, Ph.D., PE Pages in thesis, 86. Words in abstract, 253. ABSTRACT Industrial valve handwheels are in common use in many industries to block, allow, or regulate the flow of materials within a system. Significant numbers of musculoskeletal disorders have been attributed to turning valve handwheels. The torques encountered to “break” and/or turn these handwheels often exceeds 100 Nm …
An Experimental And Theoretical Critique Of Flow Model Accuracy, Shannon Ray Chollett
An Experimental And Theoretical Critique Of Flow Model Accuracy, Shannon Ray Chollett
LSU Master's Theses
In today’s exploration and production environment it is required that engineers must collect and use vast amounts of data for flow model construction and calibra- tion, as well as reservoir estimation and optimization. With modern technology, the data volume can be overwhelming. It is necessary that data monitoring and calibration are highly efficient. It is also essential that physical and mathematical models can be tested in repeatable, inexpensive experiments. The experiments described in this thesis will develop and perform verification of algorithms and can generate prior geomodels, collect and process seismic refraction data, collect and process production data, and calibrate …
Catalytic Oxidative Desulfurization: A Comparison Of Reactors, Andrew Marshall Madrid
Catalytic Oxidative Desulfurization: A Comparison Of Reactors, Andrew Marshall Madrid
LSU Master's Theses
A novel technology, a pulsed oscillating monolith reactor (POMR), was compared to a standard autoclave reactor for oxidative desulfurization (ODS) of a model diesel fuel. Two classes of catalysts, mesoporous Ti-MCM-41 and Pd on carbon, were used for ODS. The oxidants used were O2 and peroxide. The model diesel compound was 75 wt% alkanes, 24 wt% alkylaromatic, 0.95 wt% sulfur heterocycles and 0.05% nitrogen heterocycles. ODS reactions were conducted from 343-423 K and pressures from 1.0-1.3 MPa O2. The only component that was not oxidized was the alkane. The POMR showed promise; there was up to a factor of 20 …
Non-Rigid Registration Of 2-D/3-D Dynamic Data With Feature Alignment, Huanhuan Xu
Non-Rigid Registration Of 2-D/3-D Dynamic Data With Feature Alignment, Huanhuan Xu
LSU Master's Theses
In this work, we are computing the matching between 2D manifolds and 3D manifolds with temporal constraints, that is we are computing the matching among a time sequence of 2D/3D manifolds. It is solved by mapping all the manifolds to a common domain, then build their matching by composing the forward mapping and the inverse mapping. At first, we solve the matching problem between 2D manifolds with temporal constraints by using mesh-based registration method. We propose a surface parameterization method to compute the mapping between the 2D manifold and the common 2D planar domain. We can compute the matching among …
Improving Discourse Structure Identification, Jamie Allison Guidry
Improving Discourse Structure Identification, Jamie Allison Guidry
LSU Master's Theses
Rhetorical Structure Theory (Mann et al. 1988), a popular approach for analyzing discourse coherence, suggests that coherent text can be placed into a hierarchical organization of clauses. Identification of a text’s rhetorical structure through automatic discourse analysis is a crucial element for many of today’s Natural Language Processing tasks, but no sufficient tool is available. The current state-of -the-art discourse parser, SPADE (Soricut et al. 2003), is limited to parsing discourse within a single sentence. HILDA (Hernault et al. 2010) extends the parsing abilities of SPADE to the document level, but with a decrease in performance. This study achieved document-level …
Biofiltration For Treatment Of Gases Contaminanted By Beta-Caryophyllene, Weili Hu
Biofiltration For Treatment Of Gases Contaminanted By Beta-Caryophyllene, Weili Hu
LSU Master's Theses
Fixed-film biological treatment processes, commonly referred to as biofilters, have been applied to successfully treat a wide variety of volatile organic compounds (VOCs) present in air emitted by a wide variety of industrial operations. The ability of biofilters to treat some classes of VOCs, however, has not been well established. In particular, the performance of biofilters treating sesquiterpenes has not been widely studied. In the research described herein, a laboratory-scale biofilter was operated to treat a synthetic waste gas stream containing â-caryophyllene, a sesquiterpene emitted by conifer trees and industrial wood processing operations. An enrichment culture developed in an initial …
Efficient Finite Element Modeling Of Reinforced Concrete Columns Confined With Fiber Reinforced Polymers, Dan Hu
LSU Master's Theses
Fiber reinforced polymer (FRP) composites have found extensive applications in the field of Civil Engineering due to their advantageous properties such as high strength-to-weight ratio and high corrosion resistance. This study presents a simple and efficient frame finite element (FE) able to accurately estimate the load-carrying capacity and ductility of reinforced concrete (RC) circular columns confined with externally bonded fiber reinforced polymer (FRP) plates and/or sheets. The proposed FE considers distributed plasticity with fiber-discretization of the cross-sections in the context of a force-based (FB) formulation. The element is able to model collapse due to concrete crushing, reinforcement steel yielding, and …
Design And Optimization Of 2.5 Dimension Porous Media Micromodel For Nanosensor Flow Experiments, Saade Alexis Bou-Mikael
Design And Optimization Of 2.5 Dimension Porous Media Micromodel For Nanosensor Flow Experiments, Saade Alexis Bou-Mikael
LSU Master's Theses
Micromodels are used to visualize and study pore-scale phenomena such as immiscible displacements in porous media, foam flow behavior, and CO2 flooding. The understanding gained from these experiments can be used to develop models to predict future behavior of the reservoir. Most micromodels are constructed using lithography techniques that are restricted to 2D patterns that require artificial generation or manipulation of images to develop connected micromodels. Characteristics innate to the original rock structure are often lost or skewed in developing micromodels that bear little resemblance to the original media. Alternative microfabrication techniques using a micromilling tool have allowed us to …
Hurricane Damage Assessment Process For Residential Buildings, Carol C. Massarra
Hurricane Damage Assessment Process For Residential Buildings, Carol C. Massarra
LSU Master's Theses
Assessing an affected area immediately after a severe natural hazard event and saving the resulting data are vitally important in any effort to reduce future economic losses from natural hazards. These data are used as a record of buildings performance and as a major component for statistical analysis and damage modeling studies. Since these data are used as input for these studies, the data must be assessed and collected in a scientific and standardized way. Despite this requirement, neither a systematic damage assessment process nor a standardized data collection protocol is currently available in the United States to ensure that …