Browsing PhD Dissertations - DO NOT EDIT by Issue Date
Now showing items 1-20 of 239
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Development Of Computational Fluid Dynamics (CFD) Based Erosion Models For Oil And Gas Industry Applications
(Mechanical Engineering, 2013)Erosion prediction plays a critical role in different oil and gas industry segments including drill bit manufacturing, measurement & logging while drilling (M&LWD), and reservoir engineering/completions tools. Recently, ... -
Optimization Of The Tool Path In A Robotic Environment
(Mechanical Engineering, 2007-08-23)The rising costs and demand coupled with shrinking energy generating resources has triggered the need for optimum use of energy resources, minimizing the overhead costs and maximizing the profits. Robots have been long ... -
Numerical Study Of Chemically Reacting Viscous Flow Relevant To Pulsed Detonation Engines
(Aerospace Engineering, 2007-08-23)A computational fluid dynamics code for two-dimensional, multi-species, laminar Navier-Stokes equations is developed to simulate a recently proposed engine concept for a pulsed detonation based propulsion system and to ... -
Experimental Characterization Of Femtosecond Laser Micromachining For Silicon Mold Fabrication And Hot Embossing For Polymer Microreplication
(Mechanical Engineering, 2007-08-23)Hot embossing is a fabrication technique employed for replicating microfeatures on a polymer surface that was primarily developed to fabricate MEMS devices for microfluidic applications. This manuscript deals with ... -
Arc-heated Gas Flow Experiments For Hypersonic Propulsion Applications
(Aerospace Engineering, 2007-08-23)Although hydrogen is an attractive fuel for a hypersonic air-breathing vehicle in terms of reaction rate, flame temperature, and energy content per unit mass, the substantial tank volume required to store hydrogen imposes ... -
Autonomous And Cooperative Multi-UAV Guidance In Adversarial Environment
(Aerospace Engineering, 2007-08-23)The research presented in this dissertation is aimed at developing rule-based autonomous and cooperative guidance strategies for UAVs to perform missions such as path planning, target tracking and rendezvous while ... -
Crashworthiness Design Optimization Using Surrogate Models
(Mechanical Engineering, 2007-08-23)Despite the advances in computer technology, the enormous computational cost associated with the large-scale and complex nonlinear crashworthiness simulations renders it to be impractical to rely exclusively on computer ... -
Analysis And Optimal Design Of Beams Using Radial Basis Function
(Mechanical Engineering, 2007-08-23)The application of Multiquadric Radial Basis Function (MQ RBF) in the analysis and optimal design of beams are addressed in this dissertation. For static analysis, a new Least Square Collocation (LSC) method is introduced. ... -
Numerical Study On Capillarity- Dominant Free Surface And Interfacial Flows
(Mechanical Engineering, 2007-08-23)The continuum surface force (CSF) method has been extensively employed in the volume-of-fluid (VOF), level set (LS) and front tracking methods to model surface tension forces. Its ability is limited for the surface tension ... -
An Experimental Investigation Of Ionization Of Supersonic Air By A Corona Discharge
(Aerospace Engineering, 2007-08-23)A technique is developed to ionize supersonic air flow in a shock tube by a weak corona discharge. The driven section of the tube is open to the atmosphere. The shock propagates in the driven section at about 1 km/s by ... -
Enhancement Of Pool Boiling Heat Transfer Using Thermally-conductive Microporous Coating Techniques
(Mechanical Engineering, 2007-08-23)The present research is an experimental study of the enhancement of boiling heat transfer using microporous coating techniques. The current research is divided into four major phases. During the first phase, the effects ... -
Context-aware Inference System To Capture Design Rationale From Legacy MCAD
(Mechanical Engineering, 2008-04-22)There exist numerous design rationale systems that convert captured information into structured design rationale while providing rationale representation and retrieval. These systems woefully neglect the design rationale ... -
On The Near Field Mean Flow Structure Of Transverse Jets Issuing Into A Supersonic Freestream
(Aerospace Engineering, 2008-04-22)The near field mean flow structure of transverse jets issuing from a surface into supersonic crossflow is examined using numerical methods and separation topology. The Navier-Stokes solver Falcon, developed at Lockheed ... -
An Analytical And Numerical Model For Design Of Non- Uniformly Powered Silicon Chips Based On Both Thermal And Device Clock Performance
(Mechanical Engineering, 2008-04-22)Silicon chips continue to grow in capabilities, complexity and performance. Silicon chips typically integrate functional components such as logic and level two (L2) cache memory in their architecture. This functional ... -
Stress Distribution And Strength Prediction Of Composite Laminates With Multiple Holes
(Mechanical Engineering, 2008-04-22)The major purpose of this study was to investigate failure of composite laminates with multiple unloaded holes in close proximity. The least square boundary collocation method for anisotropic materials was utilized to ... -
Methodologies For Automated Microassembly
(Mechanical Engineering, 2008-08-08)The development of micromachining technologies has provided wide applications in micro sensing and actuation. However, most of the demonstrated devices are selectively constructed by fabrication processes that are limited ... -
Design For Reliability In Microoptelectromechanical Systems (MOEMS)
(Mechanical Engineering, 2008-08-08)Microelectromechanical systems (MEMS) is an enabling technology for miniaturization. MEMS consist of micron sized moving mechanical structures and electronics fabricated on a suitable substrate such as silicon. MEMS has ... -
Closed-form Development Of A Family Of Higher Order Tetrahedral Elements Through The Fourth Order
(Mechanical Engineering, 2008-08-08)This research is concerned with the development and implementation of a family of tetrahedral elements through the fourth order. The straight-sided tetrahedral elements are developed in closed-form. This work investigates ... -
The Development And Testing Of Pulsed Detonation Engine Ground Demonstrators
(Aerospace Engineering, 2008-09-17)The successful implementation of a PDE running on fuel and air mixtures will require fast-acting fuel-air injection and mixing techniques, detonation initiation techniques such as DDT enhancing devices or a pre-detonator, ... -
A Mathematical Model Development And Sensitivity Analysis Of Two Photon Polymerization For 3D Micro/nano Fabrication
(Mechanical Engineering, 2008-09-17)Two photon polymerization (2PP) is an effective technique for the fabrication of complex polymeric 3-D micro/nano features using ultrashort pulses from a NIR laser source. The photosensitive material absorbs two photons ...