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 212 for “"Two and Three Dimensional"”.
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Analysis of two- and three-dimensional flow separation
Prandtl (1904) showed that streamlines in a steady flow past a two-dimensional streamlined body separate from the boundary where the skin friction (or wall shear) vanishes and admits a negative gradient. Although commonly thought otherwise, these separation conditions are purely kinematic: They can …
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Two- and Three-dimensional Face Recognition under Expression Variation
… this thesis, the expression variation problem in two-dimensional (2D) and three-dimensional (3D) face recognition is tackled. While discriminant analysis (DA) methods are effective solutions for recognizing expression-variant 2D face images, they are not directly applicable when only a single …
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Optomechanics of two- and three-dimensional soft photonic crystals
… structures using realistic physics-based models and leverage that understanding to explain the optomechanics of actual 2-D and 3-D soft photonic crystals undergoing similar symmetry breaking nonlinear deformations. We first study the optomechanics of two classes of 3-D soft photonic crystals: (1) …
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Two and three-dimensional incompressible and compressible viscous fluctuations
… to study some special classes of unsteady two- and three-dimensional incompressible and compressible . boundary-layer flows. The general character of the mathematical problem is investigated first for each particular area. Asymptotic solutions are then provided based on the assumption of …
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Transient energy growth in two- and three-dimensional boundary layers
… Institute of Technology, Dept. of Aeronautics and Astronautics, 1993.
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A solution method for two- and three-dimensional contact problems
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1985.
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Numerical Analysis of Two- and Three-Dimensional 90-Degree Bend Flow
The two basic methods of numerical viscous flow calculation--the vorticity-transport and primitive-variable schemes--are applied to the finite-difference analysis of flow through a two-dimensional 90-degree bend between sections of straight conduit. Additionally, the vorticity-transport method is …
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Near-wall similarity in two- and three-dimensional turbulent boundary layers
… from Preston tubes, direct wall shear using a two-dimensional (single line of action) floating element device, and direct wall shear measurements from an omnidirectional floating element capable of simultaneously determining magnitude and direction of a wall shear vector were completed over a …
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Equilibrium and non-equilibrium phenomena in two- and three-dimensional correlated systems
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1996.
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Sound Radiated from Turbulent Flow over Two and Three-Dimensional Surface Discontinuities
Measurements have been performed to understand the sound source mechanism in turbulent boundary layer flow over two and three-dimensional surface discontinuities whose height is smaller than the incoming boundary layer thickness. The work was performed in two different types of boundary layers: a …
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Receptivity and growth of two- and three-dimensional disturbances in a Blasius boundary layer
… Institute of Technology, Dept. of Aeronautics and Astronautics, February 2000.
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Evaluating Ecological Influences of Altered Flow Regimes Using Two- and Three-Dimensional Hydrodynamic Models
… near river obstructions such as boulders and large woody debris provide unique habitat for many aquatic organisms. Numerical modeling of the flow structures surrounding these obstructions is challenging, yet it represents an important tool for aquatic habitat assessment. Moreover, efforts …
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Numerical Solutions for Two- and Three-Dimensional Non-Reacting Flowfields in an Internal Combustion Engine
… air of constant specific heat, with both viscous and inviscid models considered. Two- and three-dimensional engine models are examined, with the three-dimensional models including both rectangular and cylindrical geometries. The difficulties associated with obtaining numerical solutions in …
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A study of two- and three- dimensional turbulent boundary layer data sets using momentum integral techniques
An examination of selected two- and three-dimensional turbulent boundary layer data sets was made to determine the consistency of these data sets with their appropriate momentum integral equations. Several turbulent boundary layer experiments were reviewed to determined which of these provided …
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A study of velocity profile models and wall shear stress for two and three-dimensional turbulent boundary layer flows
… more prominent velocity profile models for two and three-dimensional incompressible flows was presented, with emphasis placed on those that had previously shown their ability to correlate experimental data taken under various conditions. This review included velocity profile models that …
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