Scholarly Works, Department of Aerospace and Ocean Engineering
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Research articles, presentations, and other scholarship
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Wind Dispersal of Natural and Biomimetic Maple Samaras
(MDPI, 2021-03-29)Maple trees (genus Acer) accomplish the task of distributing objects to a wide area by producing seeds, known as samaras, which are carried by the wind as they autorotate and slowly descend to the ground. With the ... -
A Coupled OpenFOAM-WRF Study on Atmosphere-Wake-Ocean Interaction
(MDPI, 2020-12-30)This work aims to better understand how small scale disturbances that are generated at the air-sea interface propagate into the surrounding atmosphere under realistic environmental conditions. To that end, a one-way coupled ... -
Lightweight Chassis Design of Hybrid Trucks Considering Multiple Road Conditions and Constraints
(MDPI, 2020-12-28)The paper describes a fully automated process to generate a shell-based finite element model of a large hybrid truck chassis to perform mass optimization considering multiple load cases and multiple constraints. A truck ... -
Multi-Scale Localized Perturbation Method in OpenFOAM
(MDPI, 2020-12-19)A modified set of governing differential equations for geophysical fluid flows is derived. All of the simulation fields are decomposed into a nominal large-scale background state and a small-scale perturbation from this ... -
Anisotropic RANS Turbulence Modeling for Wakes in an Active Ocean Environment
(MDPI, 2020-12-18)The problem of simulating wakes in a stratified oceanic environment with active background turbulence is considered. Anisotropic RANS turbulence models are tested against laboratory and eddy-resolving models of the problem. ... -
Multi-Physics Modeling of Electrochemical Deposition
(MDPI, 2020-12-11)Electrochemical deposition (ECD) is a common method used in the field of microelectronics to grow metallic coatings on an electrode. The deposition process occurs in an electrolyte bath where dissolved ions of the depositing ... -
Initial Observations by the GOLD Mission
(2020-07)The NASA Global-scale Observations of the Limb and Disk (GOLD) mission has flown an ultraviolet-imaging spectrograph on SES-14, a communications satellite in geostationary orbit at 47.5 degrees W longitude. That instrument ... -
Experimental Study of Pressure and Velocity Fluctuations Induced by Cavitation in a Small Venturi Channel
(MDPI, 2020-12-08)The purpose of this paper is to investigate experimentally the influence of the cavitation extent on the pressure and velocity fluctuations in a small convergent–divergent channel. The mean cavity length is determined ... -
Force-exerting perpendicular lateral protrusions in fibroblastic cell contraction
(2020-07-21)Aligned extracellular matrix fibers enable fibroblasts to undergo myofibroblastic activation and achieve elongated shapes. Activated fibroblasts are able to contract, perpetuating the alignment of these fibers. This poorly ... -
Lagrangian Reduced Order Modeling Using Finite Time Lyapunov Exponents
(MDPI, 2020-10-23)There are two main strategies for improving the projection-based reduced order model (ROM) accuracy—(i) improving the ROM, that is, adding new terms to the standard ROM; and (ii) improving the ROM basis, that is, ... -
Daily Variability in the Terrestrial UV Airglow
(MDPI, 2020-09-30)New capability for observing conditions in the upper atmosphere comes with the implementation of global ultraviolet (UV) imaging from geosynchronous orbit. Observed by the NASA GOLD mission, the emissions of atomic oxygen ... -
Search and rescue at sea aided by hidden flow structures
(Springer Nature, 2020-05-26)Every year, hundreds of people die at sea because of vessel and airplane accidents. A key challenge in reducing the number of these fatalities is to make Search and Rescue (SAR) algorithms more efficient. Here, we address ... -
On Using Composability Tools for Reliability Analysis of Unmanned Multi-Aircraft Systems: A Case Study
(2020-01-15)This paper presents a case study that demonstrates how tools from compositional verification can be used to design and analyze complex multi-agent systems operating in dynamic and uncertain environments. The case study ... -
Sensitivity study for ICON tidal analysis
(2020-05-22)Retrieval of the properties of the middle and upper atmosphere can be performed using several different interferometric and photometric methods. The emission-shape and Doppler shift of both atomic and molecular emissions ... -
Effect of transverse beam size on the wakefields and driver beam dynamics in plasma wakefield acceleration schemes
(2020-02-01)In this paper, wakefields driven by a relativistic electron beam in a cold homogeneous plasma are studied using 2D fluid simulation techniques. It has been shown that in the limit when the transverse size of a rigid beam ... -
Dynamic Analysis and Design Optimization of a Drag-Based Vibratory Swimmer
(MDPI, 2020-03-22)Many organisms achieve locomotion via reciprocal motions. This paper presents the dynamic analysis and design optimization of a vibratory swimmer with asymmetric drag forces and fluid added mass. The swimmer consists of a ... -
Wind Profiling in the Lower Atmosphere from Wind-Induced Perturbations to Multirotor UAS
(MDPI, 2020-02-29)We present a model-based approach to estimate the vertical profile of horizontal wind velocity components using motion perturbations of a multirotor unmanned aircraft system (UAS) in both hovering and steady ascending ... -
Pollution Transport Patterns Obtained Through Generalized Lagrangian Coherent Structures
(MDPI, 2020-02-06)Identifying atmospheric transport pathways is important to understand the effects of pollutants on weather, climate, and human health. The atmospheric wind field is variable in space and time and contains complex patterns ... -
A History of Fort Caswell, North Carolina
(Baptist Student Union, North Carolina State University, 1965)A brief history of Fort Caswell, near Southport, North Carolina, at the mouth of the Cape Fear River. -
The Global-Scale Observations of the Limb and Disk (GOLD) Mission
(2017-10)The Earth's thermosphere and ionosphere constitute a dynamic system that varies daily in response to energy inputs from above and from below. This system can exhibit a significant response within an hour to changes in those ...
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