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 17 of 17 for “"flow stability"”.
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Impacts of vehicle automation on traffic flow stability
… a small number of vehicles in the bulk traffic flow may have substantial implications on the underlying traffic flow and may influence the development of emergent phenomena such as phantom traffic jams, or traffic stability. This dissertation has four main contributions: (i) experimental …
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A three-dimensional flow stability analysis of the particle bed nuclear reactor
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1993.
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The flow stability of linear low-density polyethlene at polymer and metal interfaces
The role of the single component instability of surface melt fracture on the interface behavior in stratified bicomponent flow has been examined. First, the factors and conditions leading to the onset of surface melt fracture in linear low-density polyethylene (LLDPE) were identified using …
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The impact of action strategies on entrepreneurial success of emerging
… as improved access to finance and greater cash flow stability (GEM, 2003). Studies have indicated that high performing entrepreneurs have benefited from Complete Planning and Critical Point Planning Strategies as well as higher levels of Entrepreneurial Orientation (Krausse, 2005). Studies …
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Integrated regional enstrophy and its correlation with regime transitions in the Northern Hemisphere
… the positive Lyapunov Exponent for hemispheric flow, and as such is a measure of flow stability or predictability. In this study, IRE is calculated at 500-hPa over an area that encompasses 0[degrees] to 70[degree]s N in the Northern Hemisphere. The data sets used were the 500-hPa initial and …
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A Wiener Chaos Based Approach to Stability Analysis of Stochastic Shear Flows
… technology. The ability to maintain a laminar flow promises significant reductions in drag, with economic and environmental benefits. Whilst development of flow control technology has gained interest, few studies investigate the impacts that uncertainty, in flow properties, can have on flow …
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Design of parallel plate condensers with sintered wicks for a loop heat pipe
… The condenser was designed to ensure even mass flow distribution and phase-separation within each layer. To better understand the physics and governing parameters within the thin geometry of the condenser, an experimental setup was designed and fabricated that allowed for visualization and …
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Modification of Precipitation in Mid-Latitude Cyclones Passing over a Coastal Mountain Range
… synoptic-scale environmental conditions (flow, stability, and temperature), which were shown to exert significant controls over the flow and microphysical response upon encountering complex terrain. Prefrontal sectors contained homogeneous stratiform precipitation with a slightly enhanced …
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Rheological properties, stochastic characteristics, and second law violations of atomic fluids in Couette flow
… theories adapted to atomic fluids such as flow stability. Building on these models, we aim to understand the transitions to turbulence and flow instability in atomic fluids. Via the Poincaré inequality, we generalize a classical continuum methodology to atomic fluids and obtain a fluid …
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Theoretical and Computational Analyses on Transition and Turbulence in Purely Oscillating Pipe Flow
<p>The hydrodynamic instability of purely oscillating pipe flows is investigated in terms of the quasi-steady formulation assuming the temporal changes of the laminar base flow relative to disturbances are slow. A simple model equation is introduced to compare the exact solution of the current …
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Buoyancy-thermocapillary convection of volatile fluids in confined and sealed geometries
… horizontal temperature gradient that drives the flow of the coolant. Although such flows have been studied extensively at atmospheric conditions, our fundamental understanding of the heat and mass transport for volatile fluids at reduced pressures remains limited. A comprehensive and quantitative …
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Evaporation from nanoporous membranes for high heat flux thermal management
… of heat flux, thermal resistance, size and flow stability. This thesis reports the design, fabrication and experimental characterization for an evaporation device with a nanoporous membrane for high heat flux dissipation. Evaporation in the thin film regime is achieved using nanopores with …
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Investigation of Dynamics in Turbulent Swirling Flows Aided by Linear Stability Analysis
Turbulent swirling flows are important in many applications including gas turbines, furnaces and cyclone dust separators among others. Although the mean flow fields have been relatively well studied, a complete understanding of the flow field including its dynamics has not been achieved. The work …
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Distortion Tolerant Fan Design
… the fans need to operate in severely distorted flow, which affects the blades’ mechanical integrity, aerodynamic efficiency and stability. The aim of this thesis is to understand the impact of strengthening rotor blades on aerodynamic performance, investigate how the performance can be improved …
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Heterogeneous flow structure and gas-solid transport of riser
… mechanisms of gas-solid transport and riser flow, investigate heterogeneous flow structures of gas-solid transport and their formation mechanism of the in riser flows, both in axial and radial directions. It provides sound interpretation for the experimental observation and valuable …
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Corporate Social Responsibility in China: The Influence of Dynamic Capability and the Implications on Financial Performance and Investment
… capital market effects and the role of cash flow volatility (CFV). This paper uses investment–cash flow sensitivity (ICFS) to capture the capital market effects. Drawing on the RBV and stakeholder theory, the association between CSP and ICFS was tested in this paper. To investigate the …