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 “"transient flows"”.
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An Experimental Study of Transient Flows in Pulse Combustors
<p>The purpose of this investigation was to experimentally characterize a pulse combustor with respect to ambient conditions, pressure amplitudes, wall temperature, combustor geometry and type of centerbody used. The wall temperatures were recorded and the pressure variation was obtained using a …
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Two-Dimensional Transient Flows and Stability of Concentrated Suspensions of Clay Particles and Rheology
Motivated by geophysical flows of concentrated suspensions of clay particles, such as fluid mud, molten lava, and mining slurries, boundary-layer flows of these fluids on a slope are studied theoretically and experimentally. Rheological measurements using a state-of-the-art rheometer show that the …
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Simulation of phase domain breakup and coalescence in strong shear and transient flows using lattice-Boltzmann method
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1998.
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Solução das equações de Saint-Venant por um modelo de elementos finitos espaço-temporal
… used to describe phenomena of free surface transient flows being an example of pratical importance the flood wave routing in rivers. The main purpose of this thesis is to present a solution for such equations through the use of a modal of finite elements in space and time. The model adopts …
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Modelling Transient Air-water Flows in Civil and Environmental Engineering
… and description of air‐water interactions in transient flows. A particular emphasis is set on phenomena relevant in civil and environmental engineering, like rivers, pipes, and hydraulic structures. Theoretical results of this doctoral research may be summarized in two main propositions. …
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Modeling reactive rarefied systems using a novel quasi-particle Boltzmann solver
… for such conditions, but struggles to resolve transient flows, trace species, and high level internal energy states due to stochastic noise. Quasi-Particle Simulation (QuiPS) is a novel Boltzmann solver that describes a system with a discretized, truncated velocity distribution function. The …
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High-Frame-Rate Oil Film Interferometry
… directly measure skin friction in time dependent flows. Experiments were performed to determine the ability of a high-speed camera to capture oil film interferometry images. HOFI was found to be able to capture these interferometry images at frequencies up to 10<sup>5</sup> Hz. Steady laminar and …
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PRESSURE DRIVEN WALL JET FLOW NEAR CHANNEL EXIT AT MODERATE REYNOLDS NUMBER
… boundary conditions for steady and possibly transient flows.
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Evaluating Ecological Influences of Altered Flow Regimes Using Two- and Three-Dimensional Hydrodynamic Models
… the morphologically and biologically important transient flows, as well as quantifying their impacts on physical fish habitat during the unsteady-flow period remain rare. In this dissertation, the ability of two- (2-D) and three-dimensional (3-D) hydraulic models to reproduce the localized …
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Development of a Higher-Order Navier-Stokes Solver for Transient Compressible Flows
… solver was developed for 2‐Dimensional flows using the finite volume approach. The Van leer flux‐splitting technique was used to calculate the fluxes. The second‐order spatial accuracy was achieved using the variable extrapolation method developed by Van leer called the Montone Upstream …
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Hybrid Ventilation Flows
… understanding of the behaviour of hybrid flows and only limited quantitative guidance available for designers. The term hybrid ventilation encompasses a whole spectrum of strategies which incorporate both mechanical elements, i.e. fans, and natural elements, i.e. vents which enable a …
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Single molecule studies of branched polymer dynamics in non-dilute solutions
… of the comb polymers. We further probe the transient stretching dynamics of comb polymers in a background of semi-dilute unentangled linear polymers in extensional flow (Chapter 3). Comb polymer dynamics in semi-dilute solutions are compared to those in dilute solutions and also to linear …