Adsorption of asphaltenes at the water-oil interface contributes to the stability of petroleum emulsions by forming a networked film that can hinder drop-drop coalescence. The interfacial microstructure can either be liquid-like or solid-like, depending on (i) initial bulk concentration of asphaltenes, (ii) interfacial aging time, and (iii) solvent aromaticity. Two techniques--interfacial shear...

condensing flows in nozzles and fixed blades of steam turbine have always been the subject of many studies.in such flows, existence of liquid phase in vapor changes the nature of the flow. the major of changes are due to four main mechanisms included nucleation, droplet growth, coalescence and breakage of droplets. in this paper,the effects of coalescence process between droplets have been inve...

Coalescing supermassive black hole binaries (BHBs) are expected to be the loudest sources of gravitational waves (GWs) in Universe. Detection rates for ground or space-based detectors based on cosmological simulations and semi-analytic models highly uncertain. A major difficulty stems from necessity model BHB scale merger that inspiral. Of particular relevance GW timescale is binary eccentricit...

The effect of copolymers on the breakup and coalescence of polybutadiene ~PB! drops in polydimethylsiloxane ~PDMS! is studied using a four-roll mill flow cell. Copolymers are produced at the interface by a reaction between functionalized homopolymers. They reduce the interfacial tension and thus enhance breakup; they also inhibit coalescence of drops. Under the conditions of our experiments, th...

Abstract Chemical corrosion and hydraulic fracturing are important ways to improve the permeability of enhanced geothermal systems. In this work, we developed a discrete element code for simulating three different fracture network models after chemical corrosion. Mechanisms crack extension coalescence in field-scale with were systematically revealed, which effects time, inclination ( γ ), pH va...

Atthough it is generally believed that under natural conditionso freeze-tolerant organisms can survive only if ice formation is restricted to the extracellular space, in 1959 R. W. Salt reported that fat body cefls of the freeze-tolerant gall fly, Eurosta solidaginis (Diptera: Tephritidae)' survive intracellular freezing. Using cryomicroscopy, intratellular freezing was observed at -4.6*0.1oC f...

Using kinetic Monte Carlo simulations, we develop a framework to relate morphological properties and microscopic dynamics during island growth, coalescence, initial formation of continuous heteroepitaxial films. The average width is controlled by adatom mobility on the substrate. Subsequent evolution strongly depends Ehrlich-Schw\"{o}ebel energy barrier $E_{ES}$ deposited material. As decreases...

This work is to the best of my knowledge original, except where acknowledgements and references are made to previous work. Neither this, nor any substantially similar dissertation has been or is being submitted for any other degree, diploma or other qualification at any other university. This dissertation does not exceed 60,000 words in length. Abstract iii DFT Pak, Jun Hak 20080959 Coalesced s...

The addition of salt can induce the slow coalescence of nanobubbles (approximately 100 nm) in an aqueous solution of alpha-cyclodextrin (alpha-CD). A combination of static and dynamic laser light scattering was used to follow the coalescence. Our results reveal that its kinetic and structural properties follow some scaling laws; namely, the average size () of the nanobubbles is related to...