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 100 for “"transition region"”.
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The prediction of transition region in boundary layers
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1985.
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Numerical Simulation of the Transition Region in Hypersonic Flow
The current state of transition region modeling is investigated through a literature search. The six most promising transition region models from the literature search were implemented in the Navier-Stokes code GASP. Baldwin-Lomax is an algebraic turbulence model in which the authors discuss how it …
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Characterization of the Transition Region in the QCD Phase Diagram
… simulations in the low density regime. The transition between ordinary matter and a deconfined Quark Gluon Plasma was shown from lattice QCD to be a smooth crossover. It is probed experimentally in relativistic heavy-ion collisions at the Brookhaven National Laboratiory (BNL) and CERN, where …
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Friction factors for turbulent flow in transition region for straight tubes
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1947.
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Thermal expansion, heat capacity and structural relaxation measurements in the glass transition region.
Massachusetts Institute of Technology. Dept. of Metallurgy. Thesis. 1966. Sc.D.
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Effects of prior ductile tearing on cleavage fracture in the ductile-to-brittle transition region
… ($J\sb{c}$) measured in the ductile-to-brittle transition region of ferritic materials. In the lower-transition region, cleavage fracture often occurs under conditions of large-scale yielding but without prior ductile crack extension. The increased toughness develops when plastic zones formed at …
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The Structure and Dynamic nature of the Solar Atmosphere
… data observing network-internetwork regions across a coronal hole boundary region. The nature of quasiperiodic variability is investigated through the different temperature lines across the observed structures. Statistically significant periods are found within the range 100-900 …
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The investigation of the effects of temperature, pump pressure and the size of the pipe on the critical Reynolds number and the study of the variation of heat transmission film coefficient of the viscous fluid in the transition region
… pump pressure required for testing reaching the transition region but have little direct effect on the critical value. The pressure drop for laminar flow is approximately proportional to the Reynolds number. The film coefficients of laminar flow are very low and approximately proportional to …
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The Effects of Collisions on Plasma-Sheath Transition
… the transport physics in the plasma-sheath transition problem. Whereas in practical applications, the sheath has a finite thickness and the transport in the neighborhood of the sheath entrance is complicated. The focus of this thesis is on performing Bohm speed analysis for different …
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Modelling line emission in the lower solar atmosphere
The transition region in the solar atmosphere bridges the lower temperature, higher density chromosphere at the base with the tenuous, high temperature plasma in the corona. It undergoes a change in temperature from 25000K to about 600000K. Plasma conditions mean that fundamentally different models …
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Boundary layer transition in simulated turbine blade flow
… used to conditionally sample the signal in the transition region and hence provide mean laminar and turbulent velocity profiles in the transition region. It also provided a measurement of the intermittency. Boundary layer profiles were measured under the imposed velocity distribution at various …
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Assessment of Scaling Rule for Hot Gas Ingestion in Representative Turbine Rim Seal System for Large Industrial Gas Turbines
… the scaling provides three distinct regions of variation in the ingestion depth. With increasing non-dimensional sealing parameter there is an almost vertical drop in ingestion extent followed by a short transition to one of marginal changes in ingestion. This provides a guideline for …
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Extreme Ultraviolet Spectroscopy of the Solar Corona
… from both off-limb (plume and inter-plume regions) and on-disc observations are derived and compared with quiet sun values. These included (August 1996) a large equatorial hole, the Elephant's Trunk, probably the best example of a coronal hole observed by SOHO. Coronal hole densities in …
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Transition in boundary layer flows
An experimental investigation of transition in boundary layer flows under the influence of various freestream conditions is described.<br/><br/>Velocity profiles are obtained automatically by means of a stepper-motor driven traverse mechanism which carries a hot wire probe connected to a constant …
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Development of a [i.e. an] engineering design procedure for a complex revolute joint
… matrix method. The second example analyzes the transition region between each of the separate finite element analysis. Utilizing both methods in design reduced computer usage costs.
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Secondary Motion in Meandering Streams: An Experimental Study
… streams with low width-to-depth ratio, a long transition region can exist where there is simultaneous growth of the secondary motion induced by the local curvature, and decay of the residual secondary motion induced by the curvature of the upstream loop. This results in the emergence of a …
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Seismic Performance of Column-to-Drilled-Shaft Connections in Reinforced Concrete Bridges
… shaft transverse reinforcement in the connection region was critical in determining the failure mode of the connection. In specimens with relatively low amounts of transverse reinforcement, including the specimen tested during this study and a previous specimen tested at the University of …
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Chemical Tagging of Surface Composition Gradients With Polystyrene Nanospheres and the Extracellular Matrix Protein Fibronectin for the Study of Cellular Migration
… A pre-assembled thiol monolayer was stripped in regions with local potentials cathodic of the reductive desorption potential, while regions sufficiently anodic of that potential maintained a full thiol monolayer. A transition region bridged the bare areas and those retaining full monolayer …
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Modeling of Dry Spinning of Polymer Fibers
… instead, it passes into the homogeneous glass transition region. Model predictions were compared with concentration data for different DPF (denier per fiber) fibers and fairly good agreement is acquired by tuning the prefactors in the phenomenological diffusion coefficients. It is also …
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The rheological characterisation of non- Newtonian slurries using a novel balanced beam tube viscometer
… flow data and indicating the laminar/turbulent transition region in the two tube sizes .
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