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 9 of 9 for “"Fluid instabilities"”.
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Instabilities and flow-induced structures in anisotropic systems
… is driven out of equilibrium. Nature leverages instabilities to ‘fabricate’ complex structures that maximize performance using minimal resources, exploiting the self-amplification of small perturbations. The potential to use instabilities in practical applications, for example to engineer or …
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Oblique shock interactions with gas cylinder interfaces
This thesis presents an experimental study of fluid instabilities formed due to an oblique interatction of a shock wave with a cylindrical gas column seeded with glycol droplets. Two gases are injected into quiescent air to form the column. The first is sulfur hexafluoride (SF6) which generates the …
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Midlatitude sporadic-E layers
… cases to critical level effects and in others to fluid instabilities. The convergence of a meteor trail can, under some circumstances, account for localized enhancement of the electron density in the layer.
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Multifluid Kelvin-Helmholtz instability in weakly ionised astrophysical plasmas
… ionised astrophysical plasma flows in a multifluid regime. This numerical study is carried out using the multifluid MHD code HYDRA. An outline of the structure of this code is given in chapter 2 and the schemes which are implemented integrates the MHD equations. We are interested in multifluid …
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Oblique shock interactions With perturbed density interfaces
… an experimental and numerical consideration of fluid instabilities formed by the interaction of a planar shock wave and a cylindrical column of gas seeded with glycol droplets. Seeding a fluid flow with a passive tracer is a common practice in experimental fluids research and it is important to …
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The impact and rupture of a water-filled balloon on a rigid surface
The dropping of a water-filled latex balloon onto a flat, rigid surface is an experiment that is known and has been performed by many, but on which there is no existing published work. High-speed images taken of the process revealed a range of phenomena, many of which had not been previously …
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Influence of external environment on fluid/ion transport in confined nanoscale systems
… micro-nano junction owing to the convective fluid instabilities. Experimental works were navigated this field of research and postulated a probable convective fluid and charge instabilities for the overlimiting current characteristics in micro-nanostructures. However, an exact physical …
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Planet formation, resonant drag instabilities, and vortices
… the mechanism I uncover drives a whole class of instabilities called ‘resonant drag instabilities’ (RDIs). These appear in mixtures of gas and dust, when the two species drift relative to each other. I use linear perturbation theory and asymptotic methods in the limit of dilute dust to show that …
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Star formation and disk stability in nearby galaxies
… models. (i) The thin gas-disk model (single-fluid disk criterion, Qg) was derived for each galaxy in our sample. We use atomic gas for the majority of the sample and we use molecular gas whenever available. (ii) A two-fluid disk criterion which models a galaxy disk with gas and stars as two …