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 12 of 12 for “"small-scale turbulence"”.
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The evolution of ocean fronts in the presence of mixed layer turbulence
… of the upper ocean. On sufficiently large scales, the hydrostatic pressure gradient associated with the horizontal density gradient is often nearly balanced by a geostrophic (or thermal wind) vertically-sheared along-front flow. However, fronts in the ocean and atmosphere co-exist with …
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Vortex Ring Collision with Free-Slip and No-Slip Wall
… instability, stretching, vorticity and wall turbulence in a simplified way, required in many applications. Present study performs high Reynolds number (2500 and 4000) simulations of vortex rings approaching no-slip and free-slip walls for different radius ratio (0.1, 0.2, 0.3, and 0.4). …
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Analysis of Time-Varying Characteristics of Simulated Turbulence in Wind Tunnel
… such as turbulent intensities, integral length scales, large- and small- scale turbulence, and spectra of velocity components of the wind are obtained and studied to the simulated turbulence. At the same time, new analyzing tools, orthogonal wavelet techniques, are applied to provide additional …
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Turbulent Molecular Mixing in Gaseous Free Shear Flows
… to 29,200 were used to study the transition to small-scale turbulence. This transition was found to take place near the average location of vortex merging, and resulted in a 20 to 25% drop in the mixed jet fluid volume fraction, a 30 to 35% drop in the preferred mixed jet fluid fraction, and a …
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Morphologische Plastizität
… animals. Moreover, laboratory-generated small-scale turbulence was identified to be a proximate factor in cyclomorphosis. This special kind of turbulence is compared to turbulence evoked by the movement of other organisms. A distinct protective effect of the morphological traits against …
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Genesis, dynamics, and dissipation of turbulent magnetic fields
… the magnetogenesis, the formation of large-scale magnetic fields, the magnetized turbulent cascade through kinetic scales, and the plasma heating that ultimately ensues. We first demonstrate in a fully kinetic framework the generation of seed magnetic fields through the Weibel instability …
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Large eddy simulation of premixed combustion using flamelets
… in turbulent premixed flames and to capture turbulence scales and their influence on combustion. Thus, this approach is gaining interest in industry to analyse turbulent reacting flows. In LES, the dynamics of large-scale turbulent eddies down to a cut-off scale are solved, with models to …
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Inner-outer interactions in a rough-wall turbulent boundary layer
… interactions, where the outer layer large scales amplitude and frequency modulate the near-wall small scales. Given that the outer layer dynamics responsible for these modulations are identical in most high-Reynolds-number (Re) rough-wall flows as well, similar modulation interactions are …
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Ocean mixing and heat transport beneath Antarctic ice shelves
… processes across a range of temporal and spatial scales. We begin by examining tidal currents and their influence on basal melt rate variability, using a multi-year dataset of oceanographic mooring measurements paired with autonomous phase-sensitive radar (ApRES) melt rate observations beneath …
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Experimental and computational determination of wind loads on netted/sheeted scaffolds.
… Building (SEB) using data from the full-scale tests made in 1993-94 at Silsoe, U.K. The lower portion of the Atmospheric Boundary Layer exhibits different flow properties to the upper elevations. A procedure is presented for modelling the atmospheric surface layer flow properties in a …
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High-order Discontinuous Galerkin Methods and Deep Reinforcement Learning with Application to Multiscale Ocean Modeling
… investigating a range of phenomena from large-scale circulation patterns to small-scale turbulence, shaping our understanding of marine ecosystems, global climate, and weather patterns. However, this same wide range of spatiotemporal scales presents a distinct computational challenge in …
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Large-Eddy Simulations of Hydrocyclones
This dissertation investigates the flow physics, turbulence structure, and particle classification process in hydrocyclones using large-eddy simulations of turbulent multiphase flow. Two types of hydrocyclones are considered. The first is a classifying hydrocyclone, and the second is a mineral …