Browsing School of Aerospace, Mechanical and Mechatronic Engineering by title
-
Adaptive path planning for depth‐constrained bathymetric mapping with an autonomous surface vessel
Published 2017-01-01This paper describes the design, implementation, and testing of a suite of algorithms to enable depth‐constrained autonomous bathymetric (underwater topography) mapping by an autonomous surface vessel (ASV). Given a target ...Article -
Bounding Drift in Cooperative Localisation Through the Sharing of Local Loop Closures
Published 2018-01-01Handling loop closures and intervehicle observations in cooperative robotic scenarios remains a challenging problem due to data consistency, bandwidth limitations and increased computation requirements. This paper develops ...Article -
Characterising entrainment in fountains and negatively buoyant jets
Published 2022Turbulent fountain flow consists of two distinct stages, the initial ‘negatively buoyant jet’ (NBJ) stage, and the fully developed ‘fountain’ stage. The present study investigates both stages of the flow using particle ...Open AccessArticle -
Characteristics of unsteadiness for transitional plane fountains in linearly stratified fluids
Published 2019When a fountain is injected into a linearly stratified fluid, its behavior will be governed by the stratification of the ambient fluid, represented by the dimensionless temperature stratification parameter (s), in addition ...Open AccessArticle -
Convectively unstable turbulent open channel flow with stable surface stratification
Published 2016We use direct numerical simulations to examine fully developed turbulent open channel flow where the near wall region is unstably stratified and the outer boundary layer is stably stratified. The simulations are a model ...Article -
Correlations for maximum penetration heights of transitional plane fountains in linearly stratified fluids
Published 2016In this study, a series of three-dimensional direct numerical simulations (DNS) were carried out using ANSYS Fluent for transitional plane fountains in linearly stratified fluids with the Reynolds number (Re), Froude number ...Open AccessArticle -
Cr-Mo-V-W: A new refractory and transition metal high-entropy alloy system
Published 2019Cr-Mo-V-W high-entropy alloy (HEA) is studied, with 2553 K equilibrium solidus and high Cr content to promote protective oxide scale formation, suggesting potential applications in hot, oxidising environments. Alloy Search ...Open AccessPreprint -
Data-Driven Overlapping-Track Profile Modeling in Cold Spray Additive Manufacturing
Published 2024Cold spray additive manufacturing is an emerging solid-state deposition process that enables large-scale components to be manufactured at high-production rates. Control over geometry is important for reducing the development ...Open AccessArticle -
Data-Efficient Neural Network for Track Profile Modelling in Cold Spray Additive Manufacturing
Published 2021Abstract: Cold spray is emerging as an additive manufacturing technique, particularly advantageous when high production rate and large build sizes are in demand. To further accelerate technology’s industrial maturity, the ...Open AccessArticle -
Design and Simulation of a Flexible Bending Actuator for Solar Sail Attitude Control
Published 2021This paper presents the design of a flexible bending actuator using shape memory alloy (SMA) and its integration in attitude control for solar sailing. The SMA actuator has advantages in its power-to-weight ratio and light ...Open AccessArticle -
Destratification of thermally stratified turbulent open-channel flow by surface cooling
Published 2020Destratification of thermally stratified open-channel flow by surface cooling is investigated using direct numerical simulation. The initial states are the equilibrium states resulting from radiative heating. Using these ...Open AccessArticle -
Direct numerical simulation and large eddy simulation of wind shear effects on non-stratified open channel flow
Published 2018In this study, direct numerical simulation (DNS) and large eddy simulation (LES) of turbulent channel flow beneath a flat surface with imposed wind shear stress are presented. An open channel with friction Reynolds number ...Open AccessConference paper -
Does Upper Airway Deformation Affect Drug Deposition?
Published 2019Knowledge that enables the accurate simulation of drug deposition in the human upper airway is necessary to develop robust platforms for efficient drug delivery by inhalation devices. The human upper airway is deformable ...Open AccessArticle -
Effect of an upstream grid on the fluidization of pharmaceutical carrier powders
Published 2020The influence of grid generated mixing on the fluidization of pharmaceutical carrier powders 15 is studied in a channel-flow experiment using direct high-speed imaging and particle image 16 velocimetry (PIV). Four different ...Open AccessArticle -
Effect of Inflow Conditioning for Dry Powder Inhalers
Published 2021The transport of pharmaceutical dry powder inside an optically accessible inhaler-like device is studied using both macro- and microscopic high-speed imaging. The investigation aims to systematically study the effect of ...Open AccessArticle -
Effects of respiratory rate on the fluid mechanics of a reconstructed upper airway
Published 2022This study aims to utilise particle image velocimetry (PIV) techniques to investigate the time-dependant effects of respiratory rate in the extrathoracic airway, to show how they affect the flow field developed. There has ...Open AccessArticle -
The effects of upper airway tissue motion on airflow dynamics
Published 2019The human upper airway is not only geometrically complex, but it can also deform dynamically as a result of active muscle contraction and motility during respiration. How the active transformation of the airway geometry ...Open AccessArticle -
Electrical and transient atomization characteristics of a pulsed charge injection atomizer using electrically insulating liquids
Published 2011Charge injection atomizers are energy efficient devices that can be used in order to promote the atomization of dielectric liquids, and a potential application of such devices is fine spray delivery in small internal ...Open AccessArticle -
Entrainment across a sheared density interface in a cavity flow
Published 2018The entrainment of fluid across a sheared density interface has been examined experimentally in a purging cavity flow. In this flow, a long straight cavity with sloped entry and exit boundaries is located in the base of a ...Open AccessArticle -
Entrainment and structure of negatively buoyant jets
Published 2021Turbulent negatively buoyant jets occur when the buoyancy of a jet directly opposes its momentum, and will decelerate until its mean momentum is reduced to zero. Here, the flow reverses direction and, for an axisymmetric ...Open AccessArticle