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.
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Showing 1 to 20 of 2085 for “"Turbulence"”.
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TURBULENCE AND CHANGES
Organizations are facing increasing turbulence. However, we still lack a nuanced understanding of how different turbulence with different attributes might alter the change process and how organizational and individuals might cope with the increasing turbulence they are facing. This dissertation …
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Turbulence in Natural Environments
… study a few subsets of this general problem of turbulence in natural environments- in the context of neutral and thermally stratified atmospheric surface layer, the presence of a heterogeneous vegetation canopy and the interaction between air flow and a static water body in presence of flexible …
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Random theory of turbulence
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1962.
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Turbulence Control in Wall Jets
… and frequency modulate the finer scales of turbulence. This offers a path to control wall turbulence by controlling the large-scales of the flow. The focus of this thesis is to establish ways to manipulate the energy of the large-scale structures in a model turbulent boundary layer and …
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Flow regimes in canopy turbulence
… above the canopy. In the sparse regime, turbulence penetrates relatively unhindered into the canopy, whereas in the dense regime, this penetration is limited. It is shown that the common measure of canopy density based on frontal density λ_f does not accurately predict the density regime …
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Turbulence-particle interactions on surfaces
The physics of adhesion and detachment of particles in ventilation ducts is important to understand and control contaminant and pathogen dispersal indoors. This thesis presents an experimental characterization of parameters which affect the resuspension of settled micro-particles and spores in a …
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Spatiotemporal Signatures of Elastoinertial Turbulence
… of these instabilities engenders a state of turbulence with significantly different spatiotemporal features compared to Newtonian turbulence, commonly termed elastoinertial turbulence (EIT). We explore EIT by studying the dynamics of low-speed submerged jets of dilute aqueous polymer …
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Turbulence modeling in hypersonic inlets
… to analyze the performance of different turbulence models when applied to flow through a Mach 7.4 hypersonic inlet. The analysis, which is two-dimensional, is done by comparing computational results from a Parabolized Navier Stokes code, with experimental data. The McDonald Camarata (MC) …
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Submesoscale turbulence in the upper ocean
… submesoscale range transition from geostrophic turbulence at large scales to inertia–gravity waves at small scales, with the transition scale depending dramatically on geographic location. A similar transition is shown to occur in the atmosphere, suggesting intriguing similarities between …
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Finescale abyssal turbulence: sources and modeling
… spatial distribution of diabatic abyssal turbulence is germane to understanding the abyssal branch of the global overturning circulation. This thesis addresses the issue through 1) an investigation of the dynamics of an abyssal boundary layer and through 2) the construction of a …
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Thinning and turbulence in aqueous films
This thesis covers the topic ”Thinning and Turbulence in Aqueous Films”. Experimental studies in two-dimensional systems gained an increasing amount of attention during the last decade. Thin liquid films serve as paradigms of atmospheric convection, thermal convection in the Earth’s mantle or …
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Turbulence measurements in drag reducing flow
… are not valid for wedge probes. The structure of turbulence in drag reducing soap and polymer solutions was studied using a hot-film wedge probe. Intensity of turbulence measurements in drag reducing fluids indicate that the structure of trubulence is strongly dependent on the condition of the …
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Turbulence modeling for film cooling flows
An improved two equation turbulence model has been developed in this dissertation to better predict the complex film cooling flow field that is formed from the interaction of a coolant jet and a crossflow over a modeled turbine blade surface. Film cooling of turbine blades is commonly employed to …
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Quantum turbulence generated by moving grids
We present experimental results on quantum grid turbulence produced by moving grids within superfluid 4He, both at millikelvin temperatures, with an oscillating grid, and at temperatures above 1.4 K with a linearly moving grid. Floppy devices were used at millikelvin temperatures to produce quantum …
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On Some Structure-Turbulence Interaction Problems
Made available in DSpace on 2014-12-14T04:42:03Z (GMT). No. of bitstreams: 1 7726709.pdf: 3617591 bytes, checksum: eb7941618761cc0aedb1509c517cd269 (MD5) Previous issue date: 1977
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Optical Wave Propagation in Inhomogeneous Turbulence
Made available in DSpace on 2014-12-12T20:54:29Z (GMT). No. of bitstreams: 1 7709063.pdf: 2655007 bytes, checksum: 0e85b400ea89b10cae02d3d79fd7b755 (MD5) Previous issue date: 1976
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Spectrum of Turbulence in Axisymmetric Flow
Made available in DSpace on 2014-12-05T17:15:13Z (GMT). No. of bitstreams: 1 0010537.pdf: 13650180 bytes, checksum: fc05a92d0c06316fed10e5b584e7f639 (MD5) Previous issue date: 1954
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