Now showing items 11-20 of 20
Multidisciplinary Study of Soft Shape Morphing Systems
(2021)
Nature abounds with examples of shape morphing systems where an entity either gradually grows into a complex 3-D shape pattern or rapidly morphs into a new configuration. Inspired by the shape shifting capabilities of ...
Understanding the Impacts of Mesosphere and Lower Thermosphere on Thermospheric Dynamics and Composition
(2021)
The Earth’s Ionosphere and Thermosphere (IT) is a highly dynamic system persistently driven by variable forcings both from above (Solar EUV and the magnetosphere) and the lower atmosphere. The forcing from below accounts ...
Numerical and Analytical Multiscale Modeling of High Cycle Fatigue in Advanced Materials
(2018)
Integrated Computational Materials Engineering (ICME) approaches are gaining popularity in various industries, such as electronics, automobile, and aerospace, due to their focus on multiscale simulation-based design and ...
A Two-dimensional Hybrid-Direct Kinetic Model of a Hall Thruster
(2020)
The goal of this dissertation is to improve the state-of-the art modeling approaches available for simulating the discharge plasma in a Hall effect thruster (HET). A HET is a space propulsion device that utilizes electrical ...
Computational Studies of Turbulent Skin-Friction Drag Reduction with Super-Hydrophobic Surfaces and Riblets
(2017)
Skin-friction Drag Reduction (DR) with SuperHydrophobic (SH) surfaces and riblets was investigated using Direct Numerical Simulation (DNS) to study the scaling and mechanism of DR, and the pressure loads on SH surfaces in ...
The Full Two-Body-Problem: Simulation, Analysis, And Application To The Dynamics, Characteristics, And Evolution Of Binary Asteroid Systems.
(2009)
The Full Two-Body-Problem (F2BP) describes the dynamics of two unconstrained rigid bodies in close proximity, having arbitrary spatial distribution of mass, charge, or similar field quantity, and interacting through a ...
Electron Transport in Hall Thrusters
(2012)
Despite high technological maturity and a long flight heritage, computer models of Hall thrusters remain dependent on empirical inputs and a large part of thruster development to date has been heavily experimental in nature. ...
An Experimental Investigation of Reacting and Nonreacting Coaxial Jet Mixing in a Laboratory Rocket Engine.
(2009)
Coaxial jets are commonly used as injectors in propulsion and combustion devices due to both the simplicity of their geometry and the rapid mixing they provide. In liquid rocket engines it is common to use coaxial jets in ...
Plume-Surface Interactions due to Spacecraft Landings and The Discovery of Water on Mars.
(2010)
Pulsed supersonic jets or rocket plumes have different surface flow physics than steady jets, in particular in tenuous atmospheres such as that of Mars where jets are collimated over large distances compared to their ...
Enhancing Physical Modeling with Interpretable Physics-Aware Machine Learning
(2024)
The burgeoning intersection of machine learning (ML) with physics has catalyzed a transformative approach to physical modeling marked by an enhanced capacity for innovation and discovery. Traditional applications of ML in ...