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.
Results
Showing 1 to 8 of 8 for “"Saffman-Taylor"”.
-
Radial Miscible Viscous Fingering of Icelandic Mantle Plume
… radial miscible fi ngers develop due to the Saffman-Taylor instability, a fluid dynamical phenomenon which occurs when a less viscous fluid is injected into a more viscous fluid. Mobility ratio (i.e. the ratio of fluid viscosities), Peclet number (i.e. the ratio of advective and diffusive …
-
Metal-foam interface stability during the filling of lost foam moulds with aluminium alloys
… the defect was caused by polymer entrapment. A Saffman-Taylor instability was observed at the interface between Hg and a viscous glucose syrup which were contained in an analogue, that was used simulate the casting of Lost Foam moulds at room temperature. The liquid degradation products of the …
-
Viscous fingering instabilities and gravity currents.–—
… cell, which is commonly referred to as the Saffman–Taylor instability. There are three related problems studied in this thesis: a single-layer viscous gravity current spreading from a point source over a rigid surface, radial spreading of an intrusion displacing miscible fluid in a Hele-Shaw …
-
Stability of Interfaces in a SAGD Steam Chamber
… triggered by the difference in either viscosity (Saffman-Taylor) or density (Rayleigh-Taylor). To observe fingering at the edges of depletion chambers in steam-based recovery processes, fine grid simulations are required. Given that the fingers are of order of 30 cm in width, this implies grid …
-
Vertical Motions at the Fringes of the Icelandic Plume
… of radial viscous fingering due to a Saffman-Taylor instability. This fluid dynamical phenomenon occurs when less viscous fluid is injected into a layer of more viscous fluid. By comparing the thermal and convective characteristics of the plume with experimental and theoretical …
-
Experiments on the dynamics of buoyancy-driven flows in reactive porous media
… fluids, this may then prompt a Rayleigh-Taylor or Saffman-Taylor-type instability at the fluid-fluid interface downstream of the reaction front. We investigate the critical condition for the formation of these instabilities, before proposing and testing a model for their nonlinear …
-
Controlling Viscous Fingering
Viscous fingering occurs when one fluid displaces another fluid of a greater viscosity in a porous medium or a Hele-Shaw cell. Linear stability analysis is used to predict methods of suppressing instability. Then, experiments in which nonlinear growth dominates pattern formation are analysed to …
-
Moving contact lines, wetting transitions and interfacial instabilities in confined environments
… observations. We then revisit the classic Taylor-Bretherton problem in the partial wetting regime, where air displaces a highly viscous liquid in a capillary tube. In contrast with the classic results for complete wetting, we show that the presence of a moving contact line induces a wetting …