Search results
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Title
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A Cut-Cell Based Ghost Fluid Method for Multi-Component Compressible Flows
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Author
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Liu, Chen
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Date Created
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2020
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Subjects--Topical
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Fluid mechanics
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Description
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Multi-material compressible flows are observed in several applications of practical relevance including combustion, cavitation and shock lithotripsy. To solve such flows numerically with improved efficiency and accuracy, the use of the Ghost Fluid...
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Title
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A NUMERICAL STUDY OF INTERFACIAL INSTABILITIES IN SHOCKED MATERIALS WITH SURFACE TENSION
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Author
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Bigdelou, Pedram
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Date Created
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2020
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Subjects--Topical
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Fluid mechanics, Physics
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Description
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Shock-driven multi-material flows occur in several applications including shock wave lithotripsy, underwater explosions, droplet combustion, propeller cavitation and ejection of material from surfaces subject to blast loading. Such flows are highl...
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Title
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A Random Hierarchical Laplacian
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Author
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Ray, Elijah
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Date Created
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2013
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Subjects--Topical
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Mathematics
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Description
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The Hierarchical Laplacian, proposed in Dyson's theory of one-dimensional ferromagnetic phase transitions, has a discrete spectrum with each isolated eigenvalue having infinite multiplicity. As a result, the integrated density of states is piecewi...
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Title
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Correction of the post-necking True Stress-Strain data using Instrumented Nanoindentation
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Author
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Romero Fonseca, Ivan
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Date Created
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2014
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Subjects--Topical
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Mechanical engineering, Materials science
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Description
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The study of large plastic deformations has been the focus of numerous studies particularly in the metal forming processes and fracture mechanics fields. A good understanding of the plastic flow properties of metallic alloys and the true stresses ...
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Title
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Dynamic Remedial Action Scheme Using Online Transient Stability Analysis
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Author
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Shrestha, Arun
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Date Created
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2016
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Subjects--Topical
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Electrical engineering, Engineering, Power resources
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Description
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Economic pressure and environmental factors have forced the modern power systems to operate closer to their stability limits. However, maintaining transient stability is a fundamental requirement for the operation of interconnected power systems. ...
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Title
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EFFICIENCY IMPROVEMENTS OPTIONS FOR COAL FIRED POWER PLANTS
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Author
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Ramanujam, Sriram
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Date Created
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2020
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Subjects--Topical
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Mechanical engineering, Power resources, Thermodynamics
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Description
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Efficiency improvement of the existing coal-fired power plants has been recognized as a path of no regret. The Affordable Clean Energy (ACE) rule issued on August 21, 2018, requires a 2.1% to 4.5% reduction in net plant heat rate and 1.5% improvem...
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Title
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Effect of confined rolling on structure-property relationships of Mg-Al alloys.
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Author
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Krishnan, Pavitra
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Date Created
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2021
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Subjects--Topical
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Materials science
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Description
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High performance, light weight alloys are need-of-the particularly in the defense, automotive and aerospace sectors. Magnesium is a prime candidate since it is the lightest structural metal having a mass density of 1.74g/cm3 and is the sixth most ...
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Title
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FIBER BASED TOOLS FOR POLISHING OPTICAL MATERIALS
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Author
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Shahinian, Hossein
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Date Created
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2018
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Subjects--Topical
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Mechanical engineering, Optics
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Description
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In this dissertation, the development of alternative fiber based polishing tools for the finishing of precision freeform and aspherical optics is introduced. Freeform and aspherical optics, i.e. optics with varying radius of curvatures (ROC), are ...
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Title
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FINITE ELEMENT ANALYSIS OF VORTEX MACHINING PROBES
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Author
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Vaidya, Mandar
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Date Created
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2014
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Subjects--Topical
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Mechanical engineering
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Description
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Vortex machining is a unique localized material removal process in which footprints of several nanometer in depth are obtained. It employs a resonating quartz tuning fork and a fiber attached on its upper tine. When submerged in a layer of slurry,...
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Title
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FRICTION MEASUREMENT DURING FREE VIBRATION
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Author
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Kossack, Christoph
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Date Created
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2018
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Subjects--Topical
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Mechanical engineering
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Description
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Friction is a key consideration in the behavior of many dynamic systems. However, modeling friction behavior accurately remains an engineering challenge. Current friction measurement approaches are limited to application specific tests that attemp...
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Title
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Feature-based automated tool path planning for discrete geometry
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Author
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Shen, Fei
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Date Created
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2022
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Subjects--Topical
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Mechanical engineering
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Description
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Computer Numerical Control (CNC) machining is a critical manufacturing technology used in effectively all modern products. Any improvement in efficiency or automation that reduces the cost of CNC machining is of tremendous value to the manufacturi...
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Title
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Finite element modeling and simulation of occupant responses in highway crashes
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Author
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Li, Ning
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Date Created
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2014
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Subjects--Topical
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Mechanical engineering, Mechanics
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Description
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Roadside barrier systems play an important role in reducing the number of fatalities and the severity of injuries in highway crashes. After decades of work by researchers and engineers, roadside barriers have been improved and are generally effect...
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Title
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Improving Thulium Fiber Laser Lithotripsy Efficiency
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Author
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Hardy, Luke
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Date Created
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2018
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Subjects--Topical
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Optics
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Description
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Kidney stone disease affects approximately 10% of the U.S. population. Conventional Holmium:YAG infrared laser lithotripsy is a standard minimally invasive treatment that operates based on a photothermal interaction with the main chromophore in ti...
