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 32 for “"experimental fluid"”.
-
Experimental hydrodynamics of spherical projectiles impacting on a free surface using high speed imaging techniques
… impacting the free surface using a unique experimental WebLab facility. Experiments were performed to determine the force impact coefficients of spheres and then compare obtained results to theories developed by Von-Karman [ 19] and Wagner [20]. It was found that experimental results …
-
Macroscopic convection in the thin-film processor
The thesis explores the proposal that macroscopic fluid convection in thin-film processors may be adequately represented by simple linear deterministic models. In addition, it examines the suggestion that the models themselves provide a useful tool in the search for a generalizable 'intrinsic' …
-
Advances in the visualization and analysis of boundary layer flow in swimming fish
In biology, the importance of fluid drag, diffusion, and heat transfer both internally and externally, suggest the boundary layer as an important subject of investigation, however, the complexities of biological systems present significant and unique challenges to analysis by experimental fluid …
-
Zinc-mediated cell death in the hippocampus following experimental traumatic brain injury
… Hippocampal neuronal damage is a key feature of experimental fluid percussion traumatic brain injury in rodents. However, the mechanisms contributing to the susceptibility to neuronal injury in this region are largely unknown. Since free ionic zinc (Zn2+) was shown to be toxic to neurons in …
-
A Hydrodynamic Analysis and Conceptual Design Study for an External Storage Enclosure System for Unmanned Underwater Vehicles.
… hull. Performance is predicted via Computational Fluid Dynamics using OpenFOAM and is validated using Experimental Fluid Dynamics via model towing resistance. Structural strength was determined by Finite Element Analysis.
-
Particle manipulation by attractive and repulsive forces in 2-D streaming flows
… microbubble streaming and transport flows. Our experimental setup uses steady streaming flow generated by ultrasonically driven semi-cylindrical microbubble combined with Poiseuille flow. Previous experiments have shown instances of particles being repelled from the surface of the interface. …
-
Computational and Experimental Investigation of Supersonic Convection over a Laser Heated Target
… flow was investigated both numerically and experimentally. Experiments were in the Virginia Tech supersonic wind tunnel with a Mach 4 nozzle, ambient total temperature, total pressure of 160 psi and Reynolds number of 5 × 10⁷/<i>m</i> . The target consisted of a 6.35 mm stainless steel plate …
-
Development of computational and experimental techniques to Investigate the effect of biofouling on ship hydrodynamic performance
… this PhD study aims to develop computational and experimental techniques to investigate the effect of biofouling on ship hydrodynamic performance. This aim has been realised by achieving several milestones using Computational Fluid Dynamics (CFD) and Experimental Fluid Dynamics (EFD).;This PhD …
-
Exploring the dynamics of fluid-structure interaction: From single structures to complex environmental systems
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-08-01
-
Investigations of Injectors for Scramjet Engines
An experimental study of an aerodynamic ramp (aeroramp) injector was conducted at Virginia Tech. The aeroramp consisted of an array of two rows with two columns of flush-wall holes that induce vorticity and enhance mixing. For comparison, a single-hole circular injector with the same area angled …
-
Advances in the visualization and analysis of boundary layer flow in swimming fish
In biology, the importance of fluid drag, diffusion, and heat transfer both internally and externally, suggest the boundary layer as an important subject of investigation, however, the complexities of biological systems present significant and unique challenges to analysis by experimental fluid …
-
Separated Flows Over Non-slender Delta Wings
… the speed of sound. This thesis examines experimentally the flow separation over low-sweep angle or 'non-slender' delta wings, specifically focusing on the coherent vortices characteristic of such geometries. First, stereo particle image velocimetry and surface pressure are used to …
-
Experimental study of turbulence past thin tabs
… 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, turbulent kinetic energy (TKE), and vortex …
-
Integration and Validation of Flow Image Quantification (Flow-IQ) System
… Corporation. The system is tailored towards experimental fluid mechanics applications. The second aim of this work was to test the performance of DPIV algorithms in wall shear flows, and to test the performance of several particle sizing algorithms for use in spray sizing and average diameter …
-
Dynamic control of aerodynamic forces on a moving platform using active flow control
The unsteady interaction between trailing edge aerodynamic flow control and airfoil motion in pitch and plunge is investigated in wind tunnel experiments using a two degree-of-freedom traverse which enables application of time-dependent external torque and forces by servo motors. The global …
-
The effects of turbulence on the measurements of five-hole probes
… pressure probe is a commonly used device in experimental fluid dynamics and aerodynamics. By measuring the pressure at the five pressure ports located on the tip of the probe it is possible to determine the total pressure, static pressure and the three components of velocity at a point in the …
-
Compressibility effects on large-scale structures and entrainment in turbulent planar mixing layers
… to obtain a set of benchmark computational fluid dynamics-validation data and to examine compressibility effects on shear layer turbulence. Five different dual-stream air mixing layers are studied, with levels of compressibility that range in convective Mach number from 0.19 to 0.88. The …
-
Design of an Experimental Rig to Characterize the Gust Response of Small Wind Turbines and Autorotating Seeds
… tested in a towing tank using a custom-built experimental rig. The setup was designed and constructed to allow for the measurement of instantaneous angular velocity of a rotor model towed at a prescribed kinematic profile along the tank. The conclusions presented in this thesis are based on …
-
The Influence of Yaw and Coning on Small Bio-Inspired Wind Turbines
This thesis is inspired by the coning mechanism of samaras. The study consists of wind tunnel measurements of low aspect ratio horizontal-axis wind turbine models. The tested coning angles (β) ranged from 5◦ to 25◦, and power and tip-speed ratio were measured at Reynolds numbers Re_D = [0.46 ×10^5, …
-
Quantifying particle sorting in microbubble streaming flows
… on oscillatory time scales are determined experimentally using a novel method in which the trajectories of small and large particles are compared. These forces are found to scale quadratically with both oscillatory flow speed and particle size. Simulations of particle trajectories are used …
Page 1 of 2