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 17 of 17 for “"turbulent intensity"”.
-
Investigation of flow characteristics in an open channel with one-line semicircular vegetation patches
… of the channel in which velocity distribution, turbulent intensity, and vortex generation are analyzed. The resistance force offered by a vegetation patch causes the change in water depth which have a broader application in river management, bank stabilization, and flood control. The measurement …
-
Velocity Measurements for Turbulent Nonseparated Flow Over Solid Waves
… wavy surfaces. Time-averaged velocity and turbulent intensity data are given.
-
Turbulent Separated Flow Over Wavy Surfaces
… data acquisition. Time-averaged velocity, turbulent intensity, skewness, and flatness data are given.
-
Use of a convective emission chamber to study particle resuspension
… at different levels of air velocity (0-0.5 m/s), turbulent intensity (5-40%), temperature (15-30$\sp\circ\rm C),$ and relative humidity (30-80%). Particle resuspension rates were measured with a laser based optical particle counter for various combinations of environmental conditions with and …
-
Experimental study of fish response to turbulent flow fields generated by in-stream structures
… data that allows for correlation of mean and turbulent flow statistics with swimming behavior. Mean velocities, turbulent intensity, Reynolds stresses, and vorticity are investigated to explore both intensity and orientation of turbulent flow structures and their impact on swimming speed, …
-
The Three-Dimensional Turbulent Boundary Layer on a Rotating Disk
<p>Three-dimensional turbulent boundary layers (3DTBL) are seen quite commonly in nature as well as in the engineering applications. Despite this, very few high Reynolds number studies have been carried out on these boundary layers, particularly focusing on eddy structure, eddy scales and their …
-
An Experimental Study of Compressible Turbulent Reattaching Free Shear Layers
… to study compressible, two-dimensional, turbulent reattaching free shear layers formed by geometrical separation of a Mach 2.46 and a Mach 2.07 turbulent boundary layer flows over a backward-facing step. In the first set of experiments, the wind tunnel test section was specifically …
-
Effects of Free Stream Turbulence on Compressor Cascade Performance
… length of approximately 1.2-2x106. A passive turbulent grid was used as the turbulence-generating device, it produced a turbulent intensity of approximately 1.6%. The total pressure loss coefficient was reduced by 11-56% at both the "lowest loss level" and more positive cascade angles for both …
-
LES of pulsatile flow in the models of arterial stenosis and aneurysm
… channel to gain insight of the transition-to-turbulent blood flow due to the arterial stenosis and aneurysm. In the stenosed model, a cosine shape stenosis is placed at the upper wall of a 3D channel which reduces the cross-sectional area, whereas the aneurysm which is also placed at the upper …
-
Interaction of High Aspect-Ratio Micro-Pillars with Wall Turbulence
… away from the wall indicated by a shift in the turbulent-intensity peak in the inner region of the flow over HAMuP array. The energy spectra also reveals a shift of the energetic structures away from the wall. Measurements taken downstream of the HAMuP array point to a damping of the energetic …
-
Experimental and Numerical Investigations of the Thermal Environment in Air-cooled Data Centers
… to measure power, flow rates, velocities, turbulent intensity, and temperature distribution around three simulated computer racks in the controlled RL environment. CFD models were developed and the results were validated against the experimental data measured in the RL. All CFD simulations …
-
Turbulence Modulation of Polydisperse Particles in a Square Particle-Laden Jet: Numerical Investigation
… the effects of fluctuating velocity and intensity when the particles and continuous fluid interact in a turbulent flow field. The rate at which turbulence modulation is altered is dependent upon parameters such as particle size, mass loading, Stokes number, coupling, volume fraction and …
-
Experiments in turbulent soap-film flows: Marangoni shocks, frictional drag, and energy spectra
… measurements of the frictional drag in turbulent soap-film flows over smooth walls. These flows are effectively two-dimensional, and we are able to create soap-film flows with the two types of turbulent spectrum that are theoretically possible in two dimensions: the ``enstrophy …
-
Generation of sand ripples and sand bars by surface waves
… and is driven by ripple-induced flow. But the intensity of this process varies spatially with the period of half the surface wavelength due to the reflection. The results show that beneath the envelope minima (nodes) ripples grow the fastest and are the longest; under the envelope maxima …
-
Multi-Property Internal Flow Field Quantification using Molecular Filtered Rayleigh Scattering
… FRS signal are quantified as a function of their intensity relative to the Rayleigh scattered light. As the most significant contributor to Rayleigh scattering contamination, methods for reducing geometric or background contributions were investigated. Structured illumination was applied in …
-
Advanced experimental modelling of hydrodynamic and aerodynamic wakes in floating offshore wind turbines using particle image velocimetry
… like pressure distributions, Reynolds stresses, turbulent kinetic energy (TKE), and turbulent intensity (TI). This highlights the need to utilise advanced measurement techniques, such as underwater stereoscopic particle image velocimetry (SPIV). While underwater SPIV has shown significant promise …
-
Transport of Heat and Momentum In Non-Equilibrium Wall-Bounded Flows
… the mean flow time scales are comparable to turbulent flow time scales, do not exhibit universal behaviors and cannot be characterized only in terms of local parameters. Pressure gradients, fast transients and complex geometries are among the sources that can perturb a flow from an …