Aerodynamics And Vortex Structures Of A Flapping Airfoil In Forward Flight In Proximity Of Ground,
2017
Washington University in St. Louis
Aerodynamics And Vortex Structures Of A Flapping Airfoil In Forward Flight In Proximity Of Ground, Hang Li
McKelvey School of Engineering Graduate Student Theses & Dissertations
The traditional flapping wing high lift mechanism research mainly focuses on the wing in unbounded flow. However, the real insect flight includes not only the unbounded flow field but also the near-surface flight. Therefore, research on near-surface flight can help reveal the high-lift mechanism of insect flight and should also be beneficial to the research on Micro-Air-Vehicles (MAV). In this thesis, the flow fields of an airfoil in hover and forward flight are simulated in the presence of ground by newly available function of “dynamic meshing” in ANSYS Fluent is employed. The characteristics of aerodynamics, pressure distribution, and vortex structure …
Design And Computational Fluid Dynamics Analysis Of An Idealized Modern Wingsuit,
2017
Washington University in St. Louis
Design And Computational Fluid Dynamics Analysis Of An Idealized Modern Wingsuit, Maria E. Ferguson
McKelvey School of Engineering Graduate Student Theses & Dissertations
The aerodynamics of a modern wingsuit has been the subject of very few detailed scientific studies to date. The prevailing design process remains the dangerous “sew and fly” method, in which designs are tested when they are first flown. This study utilizes Computational Fluid Dynamics (CFD) tools to analyze the flow field and aerodynamics of an idealized wingsuit, which is designed using Computer-Aided Design (CAD) modeling. The 3D CAD software Autodesk Inventor is used to create the wingsuit model, which is designed with a Gottingen 228 airfoil cross-section and a relatively large planform of aspect ratio 1.3. The commercial flow …
Aerodynamics And Shock Buffet Of A Transonic Airfoil In Ground Effect,
2017
Washington University in St. Louis
Aerodynamics And Shock Buffet Of A Transonic Airfoil In Ground Effect, Boshun Gao
McKelvey School of Engineering Graduate Student Theses & Dissertations
No abstract provided.
Numerical Study Of The Aerodynamics Of Dlr-F6 Wing-Body In Unbounded Flow Field And In Ground Effect,
2017
Washington University in St. Louis
Numerical Study Of The Aerodynamics Of Dlr-F6 Wing-Body In Unbounded Flow Field And In Ground Effect, Ning Deng
McKelvey School of Engineering Graduate Student Theses & Dissertations
The main focus of this thesis is on the simulation of flow past a three-dimensional wing-body configuration (DLR-F6) in ground effect; a complex 3D wing-body configuration in ground effect has never been analyzed in the aerodynamics literature to date. For the purpose of validation of the simulation approach, computations are performed for the DLR-F6 wing-body in unbounded flow and are compared with the experimental data. The commercial CFD solver ANSYS FLUENT is employed for computations. Compressible Reynolds-Averaged Navier-Stokes (RANS) equations in conjunction with Spalart-Allmaras (SA) and - Shear Stress Transport (SST) turbulence models are solved. The validated code is employed …
Speculations On A City For Mars,
2017
Syracuse University
Speculations On A City For Mars, Edouard Terzis
School of Architecture - Theses
This thesis proposes the reinterpretation of architectural forms as the index of the constitution of the idea of the city. “Speculations on a City on Mars” is paradoxical in a sense as it superposes both the managerial representation of a city, that is Zoning, along with the speculative aspect of an extra-terrestrial city.
Using Activated Charcoal To Reuse Anesthetic Gas,
2017
University of Utah
Using Activated Charcoal To Reuse Anesthetic Gas, Patrick Kolbay, Joseph Orr, Kai Kück
Utah Space Grant Consortium
General anesthesia enables surgery, with anesthesia machines being the predominant tool to do so. However, these machines are hard to maintain, costly, and require significant supporting infrastructure. The current design of anesthesia machines demands the disposal of anesthetic gases at a rate equal to fresh oxygen entering the system. This causes several orders of magnitude more anesthetic vaporized than needed, yielding negative economic and environmental impact. To address this, we propose utilizing the porous surface of activated charcoal to absorb and desorb the anesthetic gases to be reused.
A Hydrodynamic Model For Plasmasphere Refilling Following Geomagnetic Storms,
2017
Utah State University
A Hydrodynamic Model For Plasmasphere Refilling Following Geomagnetic Storms, Kausik Chatterjee, Robert W. Schunk
Utah Space Grant Consortium
The refilling of the plasmasphere following a geomagnetic storm remains one of the longstanding problems involving ionosphere-magnetosphere coupling. Both diffusion and hydrodynamic approximations have been adopted for the modeling and solution of this problem. The diffusion approximation neglects the nonlinear inertial term in the momentum equation and so this approximation is not rigorously valid immediately after a storm. The principle focus of this work is the formulation and development of a hydrodynamic refilling model (that includes the nonlinear inertial term) using the fluxcorrected transport method, a numerical method that is extremely well suited to handling nonlinear problems with shocks and …
Using Hotspot Analysis And Detection Of Early Season Invasives (Desi) To Analyze The Temporal And Spatial Dynamics Of Invasive Cheatgrass (Bromus Tectorum).,
2017
Brigham Young University
Using Hotspot Analysis And Detection Of Early Season Invasives (Desi) To Analyze The Temporal And Spatial Dynamics Of Invasive Cheatgrass (Bromus Tectorum)., Tara B.B. Bishop, J. Belnap, S. Munson, R. A. Gill, Sam B. St. Clair
Utah Space Grant Consortium
The invasion of exotic annual grasses during the last century has transformed plant habitats and communities worldwide. Cheatgrass (Bromus tectorum) is a winter annual grass that has invaded over 100 million acres of the western United States (Pellant and Hall, 1994. Pellant, 1996). Cheatgrass quickly utilizes available resources especially after a disturbance to the landscape. A major impact of invasion is the increased frequency in fires (D’Antonio and Vitousek, 1992). As cheatgrass is highly successful at invading open and disturbed landscapes at a rapid pace it increases the frequency and severity of fires in arid landscapes (Brooks, 2005). …
Linking Quantitative Motor Assessments To The Underlying Brian Injury: A Preliminary Report,
2017
Brigham Young University
Linking Quantitative Motor Assessments To The Underlying Brian Injury: A Preliminary Report, Paula Johnson, Clay Kincaid, Nathan Muncy, Steven K. Charles
Utah Space Grant Consortium
Using custom software and an inexpensive novel motion capture controller, we adapted and automated traditional subjective motor assessments in an integrated system to develop a quantitative motor assessment (QMA) that is low-cost, and highly sensitive. Twelve participants who have suffered a traumatic brain injury performed the QMA and had MRI scans of their brain. We compared the individual QMA results from the TBI group to normative standards (developed in an earlier work). We also compared the QMA results to measures of damage found in MRI results. Preliminary analysis of a subset of data are reported here.
Acoustic Measurements Of Lithium-Ion Battery Electrode Films,
2017
Brigham Young University
Acoustic Measurements Of Lithium-Ion Battery Electrode Films, Kathryn L. Dallon, Jing Yao, Dean R. Wheeler, Brian A. Mazzeo
Utah Space Grant Consortium
This research investigates the use of acoustic measurements as an alternative means of non-destructive quality control for Li-ion battery films. The goal of this research is to enable accurate, non-destructive inspection of the battery electrode as it is being manufactured, so that problems can be identified and addressed early on. Here we report on our efforts to distinguish between films with different mechanical properties using acoustic resonances and surface acoustic wave (SAW) velocity. We were able to differentiate between films of various coating thicknesses using resonance measurements. We also used resonance measurements to monitor a material as it dried. SAW …
Desorption Electrospray Ionization (Desi) Mass Spectrometric Imaging Of Spatially Regulated In Vivo Metabolic Rates,
2017
Brigham Young University
Desorption Electrospray Ionization (Desi) Mass Spectrometric Imaging Of Spatially Regulated In Vivo Metabolic Rates, Charlotte R. Lewis, Richard H. Carson, Mercede N. Erikson, Anna P. Zagieboylo, Bradley C. Naylor, Kelvin W. Li, John C. Price, Paul B. Farnsworth
Utah Space Grant Consortium
Desorption electrospray ionization (DESI) is an ambient ionization technique used for mass spectrometric imaging of biological samples. When coupled with isotopic ratio measurements of deuterium-labeled tissues, DESI provides a means of measuring metabolic rates on a spatially resolved basis. In vivo metabolic rates are desired to better understand diseases such as Alzheimer’s, Parkinson’s, and Huntington’s and to study the impact of space travel on muscle tissue growth and wasting. Although DESI has been used to image lipids and metabolites of a variety of tissues and other imaging techniques, such as NIMS, have been used to study kinetic turnover rates, DESI …
Towards Unsupervised Deep Learning Based Anomaly Detection,
2017
Utah State University
Towards Unsupervised Deep Learning Based Anomaly Detection, Trevor Landeen, Jacob Gunther
Utah Space Grant Consortium
Novelty or anomaly detection is a challenging problem in many research disciplines without a general solution. In machine learning, inputs unlike the training data need to be identified. In areas where research involves taking measurements, identifying errant measurements is often necessary and occasionally vital. When monitoring the status of a system, some observations may indicate a potential system failure is occurring or may occur in the near future. The challenge is to identify the anomalous measurements that are usually sparse in comparison to the valid measurements. This paper presents a land-water classification problem as an anomaly detection problem to demonstrate …
Considering Manufacturability In The Design Of Deployable Origami-Adapted Mechanisms,
2017
Brigham Young University
Considering Manufacturability In The Design Of Deployable Origami-Adapted Mechanisms, Erica B. Crampton, Spencer P. Magleby
Utah Space Grant Consortium
Primary barriers to greater implementation of deployable origami-adapted mechanisms are their manufacturability and robustness. This paper discusses manufacturability in the design of such mechanisms through presenting and examining three examples. Manufacturability lessons gathered from these examples include the importance of joint-panel interfaces and how techniques and approaches for origami-adapted design can be customized to meet the needs of a specific product. As the manufacturability of deployable origami-adapted products is addressed and improved, their robustness will also improve, thereby enabling greater use of origami-adapted design.
An Optical-Based Aggregate Approach To Measuring Condensation Heat Transfer,
2017
Brigham Young University
An Optical-Based Aggregate Approach To Measuring Condensation Heat Transfer, Kimberly A. Stevens, Julie Crockett, Daniel R. Maynes, Brian D. Iverson
Utah Space Grant Consortium
Condensation heat transfer is significant in many applications such as such as desalination, energy conversion [1], atmospheric water harvesting [2, 3], electronics cooling, and other high heat flux applications [4]. However, condensate on the surface adds a thermal resistance that limits condensation rates. The rate of condensation heat transfer is inversely proportional to the diameter of the condensate drops [5]. In industrial condensing systems, the resistance is minimized by removing the condensate via gravity or a vapor shear, but the minimum size of droplet removal is typically on the order of the capillary length of the condensate, about 2.7 mm …
Electrochemical Sensing With High Aspect Ratio Carbon Nanotube Platforms,
2017
Brigham Young University
Electrochemical Sensing With High Aspect Ratio Carbon Nanotube Platforms, Benjamin J. Brownlee, Brian D. Iverson
Utah Space Grant Consortium
Increased sensitivity of electrochemical sensors is important for detection of low analyte concentrations. A unique flow-through sensor is demonstrated by depositing nanostructured platinum catalyst onto high aspect ratio, porous membranes of vertically-aligned carbon nanotubes (CNTs). Convective mass transfer enhancement was shown to improve the platinum-nanowire-coated CNT (PN-CNT) sensor performance in amperometric sensing of hydrogen peroxide (H2O2). Over 90% of the H2O2 was oxidized as it passed through the PN-CNT sensor, even for low concentrations in the range of 50 nM to 500 μM. This effective utilization of the analyte in detection demonstrates the …
An Efficient Linear Octree-Based Grid Toward Magnetic Fluid Stimulation,
2017
Brigham Young University
An Efficient Linear Octree-Based Grid Toward Magnetic Fluid Stimulation, Sean Flynn, Parris Egbert
Utah Space Grant Consortium
An Eulerian approach to fluid flow provides an efficient stable paradigm for realistic fluid simulation. However its reliance on a fixed-resolution grid is not ideal for simulations that exhibit both large and small-scale fluid phenomena. A coarse grid can efficiently capture large-scale effects like ocean waves, but lacks the resolution needed for small-scale phenomena like droplets. On the other hand, a fine grid can capture these small-scale effects, but is inefficient for large-scale phenomena. Magnetic fluid, or ferrofluid, illustrates this problem with its very fine detail centered about a magnet and lack of detail elsewhere. Our new fluid simulation technique …
Targeting Sram Fpga Components Using A Two-Photon Absorption Laser,
2017
Brigham Young University
Targeting Sram Fpga Components Using A Two-Photon Absorption Laser, Matthew Cannon Andrés Pérez-Celis, Michael Wirthlin
Utah Space Grant Consortium
State-of-the-art SRAM FPGAs (Field Programmable Gate Arrays) are being increasingly considered for use in space applications, due to their reprogrammability and many dedicated resources that implement many common tasks at high speeds. However, the programmable fabric and resources are susceptible to ionizing radiation common in space, causing the device to fail. The radiation effects of all the components need to be known in order to develop effective mitigation techniques. This information, however, is difficult to obtain through typical broadbeam ion testing, due to low observability rates of the components. This paper present the results of a study to use a …
Implementation Of Openfoam For Inviscid Incompressible Aerodynamic Flows,
2017
Utah State University
Implementation Of Openfoam For Inviscid Incompressible Aerodynamic Flows, Jackson T. Reid, Douglas F. Hunsaker
Utah Space Grant Consortium
This paper is the description of the Utah State University AeroLab’s Aerodynamic Center Analysis Tool (AeroCAT), which is an implementation of the OpenFOAM CFD toolbox. AeroCAT takes in a user input file, generates a mesh, and solves a steady, inviscid, incompressible flow, automatically repeating the process for a range of angles of attack. It then processes the results to predict the wing’s span-wise locus of aerodynamic centers. The mesh generator used in this tool is GridX, developed by a former PhD student at USU, and the CFD solver is OpenFOAM.
Simultaneous Two-Site Photometry In Attitude Determination Of Resident Space Objects,
2017
Utah State University
Simultaneous Two-Site Photometry In Attitude Determination Of Resident Space Objects, Arun Bernard, David Geller
Utah Space Grant Consortium
Attitude determination of space objects is difficult due to the non-linearity of the data and sparseness of available measurements. The combination of simultaneous photometry from two observation sites allows for more information to be obtained in a shorter amount of time. The characterization of the parameters necessary to complete this simultaneous two-site photometry are presented along with simulated results.
Learning The Language Of Genes: Representing Global Codon Bias With Deep Language Models,
2017
Brigham Young University
Learning The Language Of Genes: Representing Global Codon Bias With Deep Language Models, M. Stanley Fujimoto, Paul M. Bodily, Cole A. Lyman, J. Andrew Jacobsen, Mark J. Clement
Utah Space Grant Consortium
Codon bias, the usage patterns of synonymous codons for encoding a protein sequence as nucleotides, is a biological phenomenon that is not well understood. Current methods that measure and model the codon bias of an organism exist for usage in codon optimization. In synthetic biology, codon optimization is a task the involves selecting the appropriate codons to reverse translate a protein sequence into a nucleotide sequence to maximize expression in a vector. These features include codon adaptation index (CAI) [1], individual codon usage (ICU), hidden stop codons (HSC) [2] and codon context (CC) [3]. While explicitly modeling these features has …
