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Results for "Probability Distributions on a Circle"

Author: Lin, Feng Departments: Department of Chemical and Materials Engineering

  • Surface Charge Heterogeneities and Shear-Induced Coalescence of Bitumen Droplets

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    Fall 2012

    Lin, Feng

    potentials were effectively uniform. These two effects contributed to a more random distribution of zeta potentials on the bitumen droplet surfaces. Ultimately, it is the randomness of zeta potential, together with its average value (measured, for example, by electrophoresis), that determine the probability

    ) sliding along the surface of a much larger droplet (effectively a flat surface). Procedures were developed to allow direct quantification of the probabilities of coalescence between the two oil drops. The experimental parameters include: zeta potential of the bitumen drops (through manipulation of

    solution pH and calcium ion concentration in the electrolyte), distance of shear contact, and shear speed. These parameters were varied to observe their effects on the probabilities of drop coalescence. Contrary to traditional DLVO theory, it was demonstrated that the coalescence of bitumen droplets was

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