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- <p>Bifurcation theory<br />Fluid dynamics<br />Heat -- Convection<br />Laser Doppler velocimeter<br />Turbulence</p> (1)
- <p>Friction welding<br />Heat -- Transmission<br />Heat exchangers</p> (1)
- Adaptive control systems<br />Lasers -- Industrial applications<br />Machine-tools -- Numerical control<br />Manufacturing processes -- Design<br />Pulsed laser deposition<br />Three-dimensional imaging (1)
- Auditory perception -- Computer simulation<br />Bones -- Surgery -- Simulation methods<br />Surgery -- Computer simulation<br />Touch -- Computer simulation<br />Virtual reality in medicine (1)
- Curves on surfaces -- Mathematical models<br />Level set methods<br />Rapid prototyping<br />Solid freeform fabrication<br />Surfaces -- Mathematical models (1)
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- Diesel motor exhaust gas -- Research<br />Fluid dynamics -- Computer simulation<br />Heat -- Transmission<br />Heat exchangers -- Fluid dynamics<br />Unsteady flow (Fluid dynamics) (1)
- Epistemics<br />First-order logic<br />Random variables<br />Sensitivity theory (Mathematics)<br />Uncertainty -- Mathematics (1)
- Exhaust gas recirculation (EGR) (1)
- Internal combustion engines -- Combustion<br />Spark ignition engines -- Exhaust gas -- Analysis<br />Spark ignition engines -- Fuel consumption<br />Spark ignition engines (1)
- Lean burn (1)
- Manufacturing processes<br />Prototypes, Engineering<br />Rapid prototyping<br />Solid freeform fabrication (1)
- Minichannels (1)
Articles 1 - 9 of 9
Full-Text Articles in Mechanical Engineering
Three-Dimensional Laminar And Turbulent Convection In Separated Flow, Magesh Thiruvengadam
Three-Dimensional Laminar And Turbulent Convection In Separated Flow, Magesh Thiruvengadam
Doctoral Dissertations
"Three-dimensional laminar and turbulent separated flow and heat transfer in plane symmetric sudden expansion and plane backward facing step is examined in this dissertation. In Papers I, II, and III, simulations of 3-D laminar forced convection in plane symmetric expansion is studied...In Paper IV, 3-D turbulent flow measurements using Laser Doppler Velocimeter are made in a backward facing step flow and the three velocity components and the Reynolds stresses are measured in the separated and redeveloping flow region...In Paper V, the 2-D behavior of a thin film that is shear driven by turbulent air flow is simulated"--Abstract, page iv.
Integrated Process Planning For A Hybrid Manufacturing System, Lan Ren
Integrated Process Planning For A Hybrid Manufacturing System, Lan Ren
Doctoral Dissertations
"A hybrid manufacturing system integrated CNC machining and laser-aided layered deposition and achieves the benefits of both processes. In this dissertation, an integrated process planning framework which aims to automate the hybrid manufacturing process is investigated. Critical components of the process planning, including 3D spatial decomposition of the CAD model, improvement of the toolpath generation pattern, repairing strategies using a hybrid manufacturing system, etc., are discussed"--Abstract, page iv.
Modeling, Analysis And Experimentation For Building Ice Parts With Supports Using Rapid Freeze Prototyping, Frances D. Bryant
Modeling, Analysis And Experimentation For Building Ice Parts With Supports Using Rapid Freeze Prototyping, Frances D. Bryant
Doctoral Dissertations
"Rapid Freeze Prototyping (RFP) is a freeform fabrication method that freezes water droplets into ice in a layer-by-layer manner to additively create a 3-dimensional part. Each layer of a geometry is deposited and allowed to freeze before the next layer is added. Ice parts produced by RFP can be used in investment casting to replace wax patterns and in other applications which may benefit from the unconventional method of using ice as a pattern or mold. More recently, a sacrificial support material has been incorporated into RFP so that over-hung areas and complex geometries can be fabricated. The research presented …
Virtual Prototyping With Surface Reconstruction And Freeform Geometric Modeling Using Level-Set Method, Weihan Zhang
Virtual Prototyping With Surface Reconstruction And Freeform Geometric Modeling Using Level-Set Method, Weihan Zhang
Doctoral Dissertations
"More and more products with complex geometries are being designed and manufactured by computer aided design (CAD) and rapid prototyping (RP) technologies. Freeform surface is a geometrical feature widely used in modern products like car bodies, airfoils and turbine blades as well as in aesthetic artifacts. How to efficiently design and generate digital prototypes with freeform surfaces is an important issue in CAD. This paper presents the development of a Virtual Sculpting system and addresses the issues of surface reconstruction from dexel data structures and freeform geometric modeling using the level-set method from distance field structure. Our virtual sculpting method …
Uncertainty Analysis And Sensitivity Analysis For Multidisciplinary Systems Design, Jia Guo
Uncertainty Analysis And Sensitivity Analysis For Multidisciplinary Systems Design, Jia Guo
Doctoral Dissertations
"The objective of this research is to quantify the impact of both aleatory and epistemic uncertainties on performances of multidisciplinary systems. Aleatory uncertainty comes from the inherent uncertain nature and epistemic uncertainty comes from the lack of knowledge. Although intensive research has been conducted on aleatory uncertainty, few studies on epistemic uncertainty have been reported. In this work, the two types of uncertainty are analyzed. Aleatory uncertainty is modeled by probability distributions while epistemic uncertainty is modeled by intervals. Probabilistic analysis (PA) and interval analysis (IA) are integrated to capture the effect of the two types of uncertainty. The First …
Friction Stir Channeling: An Innovative Technique For Heat Exchanger Manufacturing, Nagarajan Balasubramanian
Friction Stir Channeling: An Innovative Technique For Heat Exchanger Manufacturing, Nagarajan Balasubramanian
Doctoral Dissertations
"Friction stir processing (FSP) is an emerging processing technique based on the principles of friction stir welding (FSW), which is a relatively new solid-state metal joining process developed by The Welding Institute, UK. Some of the unique features of FSW such as the low amount of heat generated, extensive plastic deformation and controlled flow of material is being exploited to develop new material modification and manufacturing processes. Friction stir channeling (FSC) is one such adaptation of FSP that can produce continuous and stable internal channels for application in heat exchanging equipment. Friction stir channeling produces these channels if the defect …
Addressing Nonlinear Combustion Instabilities In Highly Dilute Spark Ignition Engine Operation, Brian C. Kaul
Addressing Nonlinear Combustion Instabilities In Highly Dilute Spark Ignition Engine Operation, Brian C. Kaul
Doctoral Dissertations
"Dilute operation is a promising approach for increasing spark-ignition engine efficiency, in the form of either lean burn (air dilution) or EGR (inert dilution). High levels of charge dilution, however, lead to cyclic variability that is largely deterministic in nature. The determinism and nonlinear nature of the system indicate that it should be possible to reduce the cycle-to-cycle variations by implementing an electronic controller. Several needs arise when considering the development of such a controller. Three topics of interest are covered herein. First, a method of analysis for nonlinear dynamical systems is applied to engine data in order to estimate …
Unsteady Flow And Heat Transfer In Periodic Complex Geometries For The Transitional Flow Regime, Li-Kwen Chen
Unsteady Flow And Heat Transfer In Periodic Complex Geometries For The Transitional Flow Regime, Li-Kwen Chen
Doctoral Dissertations
"Diesel engines are facing significant challenges with upcoming changes in emissions standards. In general, meeting the increased emission standards will require a larger fraction of the engine heat rejection to occur in the vehicle cooling system. For certain applications, the surface geometry must also be such that it resists particulate fouling, precluding common interrupted surfaces such as louvered fins. Although acceptable continuous surface geometries such as bumped fin geometries are in use, the impacts of changing the parameters of this geometry are unknown. This study investigates the transport characteristics of bumped fins in the transitional flow regime using unsteady multi-dimensional …
Modeling And Rendering For Development Of A Virtual Bone Surgery System, Qiang Niu
Modeling And Rendering For Development Of A Virtual Bone Surgery System, Qiang Niu
Doctoral Dissertations
"A virtual bone surgery system is developed to provide the potential of a realistic, safe, and controllable environment for surgical education. It can be used for training in orthopedic surgery, as well as for planning and rehearsal of bone surgery procedures...Using the developed system, the user can perform virtual bone surgery by simultaneously "seeing" bone material removal through a graphic display device, "feeling" the force via a haptic deice, and "hearing" the sound of tool-bone interaction"--Abstract, page iii.