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 20 of 399 for “"coalescence"”.
-
Coalescence of secondary dispersions
A study has been made of the coalescence of secondary dispersions in beds of woven meshes. The variables investigated were superficial velocity, bed depth, mesh geometry and fibre material; the effects of presoaking the bed in the dispersed phase before operation were also considered. Equipment was …
-
Coalescence-induced nanodroplet jumping
Made available in DSpace on 2016-07-07T20:35:12Z (GMT). No. of bitstreams: 2 CHA-THESIS-2016.pdf: 2224018 bytes, checksum: 497c21f5ec14cea688f8b206e81b1b44 (MD5) LICENSE.txt: 4210 bytes, checksum: b076c2ca76ed752c030fdb8c95f208df (MD5) Previous issue date: 2016-04-28
-
Crack coalescence in granite
This thesis experimentally investigates crack coalescence in prismatic Barre Granite specimens with two pre-cut, open flaws under uniaxial compression. Using a high-speed video system, crack initiation, propagation, and coalescence are observed. Flaw geometries are chosen to allow one to compare …
-
Non-coalescence of Jets
… much work on coalescing jets of fluid and non-coalescence in other systems like drop-drop, drop on a bath, jet on a bath, non-coalescence of fluid jets has been little studied. A simple experimental setup was developed to stably demonstrate and study the non-coalescence of jets upon collision. …
-
Coalescence of bubbles and drops
… singular flows during the initial stages of the coalescence of bubbles and drops, solving for the velocity field in the fluid and the rate of coalescence. Each solution has several lengthscales, and on each lengthscale, we must solve some form of the Navier--Stokes equations. I will employ a …
-
Fracture coalescence in natural rocks
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1999.
-
Enhanced coalescence-induced jumping droplet departure
… smaller than the capillary length (~ 1mm) via coalescence induced droplet jumping. Jumping-droplet condensation has been demonstrated to enhance heat transfer, anti-icing, and self-cleaning efficiency, and is governed by the theoretical inertial-capillary scaled jumping speed (U). When two …
-
Contact and coalescence of viscous drops
… drops together into a single larger drop. This coalescence process is an example of a singular flow resulting from a topological transition, in this case between the disjoint and connected drops. In this thesis, we consider theoretically the flow in two viscous drops with inertia either side of …
-
Coalescence of secondary dispersions in packed beds
A study has been made of the coalescence of secondary dispersions in beds of monosized glass ballotini. The variables investigated were superficial velocity, bed depth, ballotini size and dispersed phase concentration. Equipment was designed to generate a toluene ln water dispersion with phase …
-
Coalescence of secondary dispersions in fibrous beds
SUMMARY A study has been made of the coalescence of secondary dispersions in a fibrous bed. The literature pertaining to the formation, hydrodynamic behaviour and methods of separation of droplets less than one hundred micrometres in diameter has been reviewed with particular reference to fibrous …
-
Controlling drop coalescence using nano-engineered surfaces
The dynamics of drop coalescence are explored on micro-scale surface features for the first time. Drop coalescence is defined as a process by which two or more droplets, bubbles or particles merge during contact to form a single droplet, bubble or particle. There are two regimes that limit the …
-
Coalescence mechanisms of dispersions in glass fibre beds
… ultrasonic probes, to detect drop collection and coalescence within the packing. Observation of droplet collection, coalescence and travel within the packing indicated that captured drops moved along the fibres and coalesced at intersections. Droplets exceeding the equilibrium size moved in a …
-
Coalescence Behaviour of Liquid Drops at Solid Surfaces
The literature on droplet hydrodynamics and coalescence mechanisms in packed beds has been reviewed. The fundamentals of liquid-liquid and solid-liquid coalescence, and characterisation of 'wetting' or 'non-wetting' behaviour in liquid-vapour-solid systems by contact angles are summarised. Contact …
-
The Recrystallization and Coalescence of Cold-Rolled Nickel
Made available in DSpace on 2014-12-04T23:26:40Z (GMT). No. of bitstreams: 1 0001563.pdf: 6705678 bytes, checksum: bba181856673f12f7e2d4cf2c22388d8 (MD5) Previous issue date: 1949
-
The convective melting and coalescence of polymer granules
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1978
-
Crack coalescence in molded gypsum and Carrara marble
This thesis investigates the fracturing and coalescence behavior in prismatic laboratory molded gypsum and Carrara marble specimens, which consist of either one or two preexisting open flaws, under uniaxial compression. In previous experimental studies, the determination of crack types …
-
Breakup and coalescence in turbulent two-phase flows
… or drops of a dispersion to undergo breakup and coalescence, and the resulting changes in the dispersion may significantly affect the engineering process under consideration. For this reason, many researchers have studied breakup and coalescence in turbulent two phase flows. Models that can be …
-
Droplet coalescence in the shear flow of model emulsions
… oil and castor oil were employed to observe drop coalescence in the absence of drop breakup; flow fields utilized were Poiseuille flow through a tube and Couette flow in a cone-and-plate device. The influence of variables such as the continuous phase viscosity, the viscosity ratio, concentration …
-
Studies of the Coalescence of Dispersions in Particulate Packings
Droplet hydrodynamics and coalescence mechanisms in a packed bed have been studied using a mono-sized primary inlet dispersion with a packing of equal sized glass spheres. Four systems were studied and a correlation was developed using a dimensional analysis to evaluate the parameters affecting the …
-
Fluid-Driven Fractures in Elastic Hydrogels: Propagation and Coalescence
… construct scalings related to the growth after coalescence, which again identifies both a viscous and toughness regime. The toughness regime is verified experimentally for the bridge growth and the universal shape of the thickness profile along the bridge. The coalesced fractures then transition …
Page 1 of 20