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 31 for “"Stratified fluid"”.
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Induced mixing in a thermally stratified fluid.
Thesis (Civ. E.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1968.
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Flow of nonuniformly stratified fluid of large depth over topography
… flow of a hydrostatic, Boussinesq, uniformly stratified fluid of large depth over topography, to accommodate two latters of uniform stratification and subsequently variable stratification. The two-layer solution follows the work by Durran ( J. 992) and is obtained in a piecewise fashion with …
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Interaction of waves in a two-layer density stratified fluid
… with a rippled bottom in a two-layer density stratified fluid in two dimensions is investigated via perturbation analyses and direct simulation. Three classes of Bragg resonances are found to exist if the nonlinear interactions up to third order in the wave/ripple steepness are considered. At …
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Nonlinear interactions of internal gravity waves in a continuously stratified fluid
… oscillations which can arise in a density-stratified fluid. They exist throughout the oceans and atmosphere, the oceanic internal wavefield being sufficiently energetic for nonlinear effects to play an important role in the internal wave dynamics. Numerical studies of oceanic internal waves …
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Nonlinear interactions of internal gravity waves in a continuously stratified fluid
… oscillations which can arise in a density-stratified fluid. They exist throughout the oceans and atmosphere, the oceanic internal wavefield being sufficiently energetic for nonlinear effects to play an important role in the internal wave dynamics. Numerical studies of oceanic internal waves …
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An experimental study of the spin-up of a stratified fluid.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1971.
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A sphere settling in a stratified fluid at small Reynolds number
… investigation of a sphere settling in a linearly stratified fluid at low Reynolds number (0.01 </= Re </= 2.1). We developed the microscale Synthetic Schlieren technique to study the wake of a microscale sphere settling through a density stratification. A video-microscope was used to magnify and …
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A laboratory study of localized boundary mixing in a rotating stratified fluid
… regions of rough topography. How locally mixed fluid interacts with the ambient fluid is an open question. Laboratory experiments explore the interaction of mechanically induced boundary mixing and an interior body of linearly stratified rotating fluid. A single oscillating bar produces a small …
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A laboratory study of localized boundary mixing in a rotating stratified fluid
… regions of rough topography. How locally mixed fluid interacts with the ambient fluid is an open question. Laboratory experiments explore the interaction of mechanically induced boundary mixing and an interior body of linearly stratified rotating fluid. Turbulence is generated by a vertically …
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On three-dimensional internal wavepackets, beams, and mean flows in a stratified fluid
… dissipation mechanisms of internal waves in a stratified fluid are of fundamental geophysical importance. While much progress in recent years has been made on two-dimensional nonlinear internal wave evolution, the effects of three-dimensional variations are still poorly understood. In this …
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The flow about a slender propellor-driven body in a temperature stratified fluid
… body moving in a temperature-stratified fluid is presented. The velocity and thermal boundary layers on the body upstream of the propellor are also examined. Mean flow velocities, static pressure, flow angularity and mean temperature distributions are reported at five …
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On the flow induced in a thermally stratified fluid by a source of heat
… long horizontal heated strip in a thermally stratified fluid is examined theoretically. For strong stratification a long flat convection cell or tongue results. Profiles of velocity and temperature anomaly are displayed and contrasted with the profiles which would obtain if the temperature …
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On the flow induced in a thermally stratified fluid by a source of heat.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1971.
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Experimental investigation of mixing in a stratified fluid due to diffusion-driven flows in a loosely-packed particle layer
… Phillips-Wunsch boundary flows in a quiescent stratified fluid. Diffusion-driven flows can exist along a sloped boundary in a fluid with a density gradient that varies with height, so these flows will also exist along the curved surface of a spherical boundary. A particle layer was created …
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Diffusion-driven flows due to an obstruction layer
… obstructions have on the density evolution of a stratified fluid is developed theoretically and demonstrated experimentally. With the use of two different types of obstruction layers, the theory is shown to accurately predict the density evolution.
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Novel applications of diffusion-driven flow
… between hydrostatic equilibrium in a density stratified fluid and the no-flux boundary condition that must be obeyed on impermeable boundaries that are sloping with respect to gravity. This conflict results in a boundary layer flow, and in this thesis we present two novel applications of …
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Visualizing internal wave generation by finite cylinder oscillations using stereo particle image velocimetry
… investigates internal wave generation in a stratified fluid by means of an oscillating cylinder. We observe the consequences of boundary effects by the production of an out-of-plane velocity field as the cylinder span is decreased. Four cylinders are used. Stereoscopic PIV is utilized for …
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The role of background flow variations in stratified flows over topography
… variations with depth, the flow of a density-stratified fluid over topography is central to various geophysical and meteorological applications and has been studied extensively. For reasons of convenience and mathematical tractability, the majority of theoretical treatments of stratified flow …
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Oblique reflections of internal gravity wave beams
… of internal gravity wave beams in a continuously stratified liquid which are incident upon a uniform slope at an oblique angle. Wave motion in a stratified fluid medium is unique in the sense that the anisotropy of stratification directs energy transport in a manner specified by the frequency of …
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The efficiency of turbulent mixing in stratified fluids
Mixing is a common feature of stratified fluids. In stratified fluids the density varies with the height. This is true for the most fluids in geophysical environments, like lakes, the atmosphere or the ocean. Turbulent mixing plays a crucial role for the overall energy budget of the earth and has …
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