Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 23 for “"Low-Re"”.
-
A Barometer of High and Low: Re-defining the Skyscraper as a Vertical City
… as central social hubs. However, the predominant design approach for these towering structures has primarily focused on practical considerations, often overlooking the spiritual well-being of individuals. This oversight has led to detrimental consequences such as mental health …
-
High Resolution Simulation of Laminar and Transitional Flows in a Mixing Vessel
The present work seeks to fully investigate, describe and characterize the distinct flow regimes existing within a mixing vessel at various rotational speeds. This investigation is computational in nature and simulates the flow within a baffled tank containing a Rushton turbine of the standard …
-
Reynolds number effects on the aerodynamics of compact axial compressors
An axial compressor for a domestic appliance can be designed to be smaller than an equivalent centrifugal compressor. However, the performance of such a compact axial compression system is limited by increased viscous losses and reduced flow turning at low Reynolds numbers ($Re$). In domestic …
-
Displacement of Fluid Droplets From Solid Surfaces
… application in coating operations, enhanced oil recovery and vapor condensation. Our goal is to predict the yield conditions (capillary number Ca) as a function of physical parameters including viscosity ratio lambda, Bond number B d and advancing and receding contact angles thetaA and thetaR. To …
-
Experimental study of turbulence past thin tabs
The turbulence past thin tabs of rectangular, triangular, and ellipsoidal geometries is experimentally investigated using particle image velocimetry at Reynolds number Re=2000 and Re=12900 based on the tabs height and freestream velocity. Turbulence statistics including streamwise velocity, …
-
Vortex generator arrays in air-cooled condensers for power plant applications
This study presents a numerical analysis of laminar convective heat transfer in a rectangular channel with different configurations of delta-winglet vortex generators (VG). A low and high Reynolds number case of 225 and 1123 is simulated which is representative of the lower and upper limits of the …
-
Surface actuation based flow control for low Reynolds number flow past an airfoil
… Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
-
Hydrodynamic and Mass Transport Properties of Microfluidic Geometries
<p>Microfluidic geometries allow direct observation of microscale phenomena while conserving liquid volumes. They also enable modeling of experimental data using simplified transport equations and static force balances. This is possible because the length scales of these geometries ensure low Re …
-
Parametric Viscous Analysis of Gust Interaction with Stationary and Elastically Mounted Airfoil
… airfoil with non-uniform, unsteady incoming flow. The study is focused on the low-Re number unsteady flows typical of MAV applications in which a gust encounter can induce a particularly significant aerodynamic and aeroelastic response. Efficient source models are developed to introduce …
-
Direct numerical simulation of microjets for turbulent boundary layer control
A direct numerical simulation approach is used to simulate an array of MEMS slot jets in a turbulent boundary layer for the purposes of flow control. Initial studies were used to first ascertain the correctness of the model and give insight into the performance characteristics of the devices. To …
-
Re-Os geochronology and geochemistry of Proterozoic sedimentary successions
Abstract The Re-Os organic-rich sedimentary rocks (ORS) geochronometer has the potential to provide precise depositional ages and vital information on the Os isotope composition of palaeo-seawater. This thesis presents new geochronology data from Proterozoic sedimentary successions and insights …
-
Role of viscoelasticity and non-linear rheology in flows of complex fluids at high deformation rates
We combine pressure, velocimetry and birefringence measurements to study three phenomena for which the fluid rheology plays a dominant role: 1) shear banding in micellar fluids, 2) extension-dominated flows in microfluidic devices, and 3) flow-induced particle migration in microchannels. Firstly, …
-
Shift - flap : Shear-layer instabilities and flow transition – A fundamental link to airfoil performance
… Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
-
Experimental and Numerical Investigation of Turbulent Heat Transfer due to Rectangular Impinging Jets
… and mass transfer potential, impinging jets have received attention in various applications. Heat transfer and flow characteristics of rectangular turbulent impinging jets issued from a 24:1 aspect ratio and 24:1 contraction ratio nozzle were investigated experimentally and numerically. In the …
-
Robust and Adaptive Nonlinear Control of Limit Cycle Oscillations in UAVs Using Synthetic Jet Actuators
… lead to structural damage and catastrophic failures. LCO can be described as vibrational motions in the pitching and plunging displacements of an aircraft wing. Even in low Reynolds number (low-Re) fight regimes, LCO can exceed the limiting boundary for safe UAV fight. Further, as practical …
-
Geologic History and the Timing of Mineralization at the Haile Gold Mine
<p>New Re-Os measurements from molybdenite from three samples of mineralized drill core at the Haile Gold Mine, SC have yielded ages of 548.7 ± 4.2, 549.0 ± 3.1, 548.4 ± 2.4 and 541.2 ± 2.3. These combined ages suggest molybdenite formation at Haile occurred between approximately 540 and 552 Ma. …
-
Numerical Investigation on Shape Impact of Deformable Droplets on Evaporation and Combustion: Method Development and Characterization
Inspired by the dilute spray regime in spray combustion, this dissertation explores the evaporation and combustion of an isolated droplet. Under a highly convective environment inside a gas combustor, due to imbalance of inertial and surface tension forces, the droplets of larger size in sprays …
-
Aerodynamic and Aeroacoustic Analysis of Low Reynolds Number Propellers Using Higher-Order RANS Transition Turbulence Modeling
… class of rotorcraft technology which operate predominantly in low-Reynolds ($Re$) number regimes. In such regimes, the flow experiences complex boundary layer phenomena like laminar separation, flow transition and reattachment. These effects are known to greatly alter the flow at and near the …
-
Mixing in high throughput experimentation reactors
… of High Throughput Experimentation (HTE) stirred vessels in the catalyst and pharmaceutical industries enable the parallel screening of potential formulations. Such tasks only require a fraction of the raw material and experimental time that are needed in conventional lab scale reactors. …
-
The role of concentrating solar power in a South African large scale renewable energy scenario
… thesis investigates a hypothetical large scale renewable energy system for South Africa over the long term future using 2050 as a nominal year of analysis. Simulation modeling was used to assess the integration of three renewable energy technologies, which are currently being installed at …
Page 1 of 2