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Now showing items 31-40 of 73
A phase field model for the gallium permeation of aluminum grain boundaries
(Massachusetts Institute of Technology, 2018)
Interfaces, such as grain boundaries, solid-liquid interfaces and solid-solid heterophase interfaces, are important features found in materials. Material properties such as fracture toughness, corrosion susceptibility and ...
Characterizing and designing engine manifolds for single-cylinder engine turbocharging
(Massachusetts Institute of Technology, 2018)
Turbocharging can provide a cost-effective means for increasing the power output and fuel economy of an internal combustion engine. It is commonly used on multi-cylinder engines, but not on commercial single-cylinder engines ...
Low-frequency, low-amplitude MEMS vibration energy harvesting
(Massachusetts Institute of Technology, 2018)
Vibration energy harvesters work effectively only when the operating conditions match with the available vibration source. Typical resonating MEMS structures cannot be used with low-frequency, low-amplitude and unpredictable ...
Aerodynamic drag on deformable and active structures in high Reynolds number conditions
(Massachusetts Institute of Technology, 2018)
We explore the effect of topography on the aerodynamic behavior of deformable structures, at high Reynolds numbers. We first introduce a novel mechanism to control the aerodynamic drag on cylinders, in the critical Reynolds ...
Low-cost soft sensors and robots for leak detection in operating water pipes
(Massachusetts Institute of Technology, 2018)
Every day, about 20% of the clean water produced in the world is lost due to pipe leaks. Due to limitations in available technologies, most of the leaks are either not found, or found too late. Every year, there are 240,000 ...
Moving contact lines, wetting transitions and interfacial instabilities in confined environments
(Massachusetts Institute of Technology, 2018)
Immiscible fluid flows are ubiquitous in nature and industry, from multiphase-flow phenomena on geologic scales such as CO2 sequestration and methane venting from seafloor sediments to bubble/drop/emulsion generation in ...
Designy : an online multimedia platform for supporting prototyping in residential product design education
(Massachusetts Institute of Technology, 2018)
In order to support a variety of situations in which students might seek additional prototyping support during project work, resources were designed to utilize a combination of photo and video formats. Annotated images are ...
Slender elastic swimmers : kinematics, dynamics, and robotic applications
(Massachusetts Institute of Technology, 2018)
Fish present a natural source of inspiration for the design of high-performance under-water robots. Conventionally, fish-like robotic systems consist of a chain of rigid links connected by a series of rigid actuators. ...
Low-cost, high performance solar vapor generation
(Massachusetts Institute of Technology, 2018)
Sustainable access to energy and access to water are two of the defining technological problems that society currently faces. Threats of climate change and depletion of fossil fuel reserves are forcing a shift towards more ...
Towards first-principles prediction of electrocatalytic activity of ABO₃ perovskites
(Massachusetts Institute of Technology, 2018)
The design of efficient, stable, and inexpensive catalysts such as ABO 3 perovskites for the oxygen evolution reaction (OER) and the oxygen reduction reaction (ORR) is crucial for the development of electrochemical energy ...