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Now showing items 421-430 of 457
A study of Taylor bubbles in vertical and inclined slug flow using multiphase CFD with level set
(Massachusetts Institute of Technology, 2016)
Slug flow commonly occurs in gas and oil systems. Current predictive methods are based on mechanistic models, which require the use of closure relations to complement the conservation equations to predict integral flow ...
Electrochemical studies of oxygen reduction for aprotic lithium-oxygen batteries
(Massachusetts Institute of Technology, 2016)
Understanding oxygen electrochemistry lies at the heart of enabling many advanced energy storage and conversion technologies such as fuel cells, electrolyzers and metal-air batteries. Aprotic Li-02 electrochemistry is ...
Modeling of solid oxide fuel cell performance with coal gasification
(Massachusetts Institute of Technology, 2016)
Growing concern over greenhouse gas emissions has driven research into clean coal power production alternatives. Novel coal power plant designs that lower CO2 emissions are imperative in the coming decades to mitigate ...
More effective use of fuel octane in a turbocharged gasoline engine : combustion, knock, vehicle impacts
(Massachusetts Institute of Technology, 2016)
Turbocharging, increasing the compression ratio, and downsizing a spark-ignition engine are well known strategies for improving vehicle fuel economy. However, such strategies result in higher in-cylinder pressures and ...
Tools for managing intermittent water supplies
(Massachusetts Institute of Technology, 2018)
Nearly one billion people receive water from piped networks that are not always pressurized. These intermittent water supplies (IWS) are more likely to recontaminate the distributed water than continuously-operated (or ...
Development of nanoparticles for oral delivery of insulin
(Massachusetts Institute of Technology, 2017)
Parenteral administration remains the mainstay of drug administration for protein therapeutics. However, for diseases that require frequent drug dose over long periods of time, injections can result in patient incompliance ...
Aerospace composite manufacturing cost models as geometric programs
(Massachusetts Institute of Technology, 2018)
The introduction of large, composite transport aircraft, such as the Airbus A350 and the Boeing 787, has been fraught with billions of dollars of production cost overruns. This research develops a novel approach to ...
Advances in membrane-based oil/water separation
(Massachusetts Institute of Technology, 2017)
Oil is a widespread pollutant from oil spills to industrial oily wastewater in the oil and gas, metalworking, textile and paper, food processing, cosmetics, and pharmaceutical industries. A wastewater of particular concern ...
Design and manufacturing of all-dielectric optical metamaterial with gradient index of refraction
(Massachusetts Institute of Technology, 2015)
Gradient index (GRIN) materials offer the most general manipulation over wave fields of light compared to conventional refractive optics, where the light is deflected by the curved surface. The creative way to implementing ...
Analytical SLAM without linearization
(Massachusetts Institute of Technology, 2017)
This thesis solves the classical problem of simultaneous localization and mapping (SLAM) in a fashion which avoids linearized approximations altogether. Based on creating virtual synthetic measurements, the algorithm uses ...