Studies on the effective properties of suspensions.
Item
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Title
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Studies on the effective properties of suspensions.
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Identifier
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AAI9808020
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identifier
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9808020
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Creator
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Wang, Yongguang.
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Contributor
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Advisers: Andreas Acrivos | Roberto Mauri
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Date
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1997
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Language
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English
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Publisher
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City University of New York.
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Subject
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Engineering, Chemical
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Abstract
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Four problems concerning the average properties of dilute suspensions are studied under the conditions that all inertia, interparticle potential and Brownian motion effects are negligible; thus only hydrodynamic interactions are important, which are governed by the creeping flows equations. First, the thermocapillary migration in a well-mixed bidisperse suspension of spherical bubbles is studied and the expression for the migration velocity is given for dilute systems. Second, for a monodisperse suspension of neutrally buoyant rigid spheres undergoing simple shearing motion, the shear-induced self-diffusion coefficients of both a liquid tracer and a tagged sphere in the direction perpendicular to the ambient flow are computed to leading order in particle concentration c. Then, the volumetric flux of particles in such a suspension in the direction of the ambient velocity due to a concentration gradient in the direction of the velocity gradient of the bulk flow is calculated again to leading order in c. Finally, the gradient diffusion coefficient of the particles in such a suspension in the direction of the velocity gradient of the bulk flow is computed for a monolayer of spherical particles to leading order in the particle areal fraction.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
