An Ellipsoidal Droplet Model For Dilute Emulsions: Application To Complex Mixing Flows

A compact droplet model and numerical simulation are used to examine the behavior of multiphase fluids in complex mixing flows. The two-dimensional, timeperiodic fluid between eccentric cylinders is used as a prototypical chaotic mixing flow. The multiphase fluid is a dilute dispersion of Newtonian...

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Bibliographic Details
Published in:WIT Transactions on Engineering Sciences 2003-01, Vol.42
Main Authors: C.L. Tucker III, Florek, C A, Pham, T
Format: Article
Language:English
Subjects:
Chaos theory
Computational fluid dynamics
Computer simulation
Cylinders
Deformation
Dilution
Droplets
Emulsions
Mathematical models
Multiphase
Spatial distribution
Stretching
Surface tension
Two dimensional flow
Viscosity
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Summary:A compact droplet model and numerical simulation are used to examine the behavior of multiphase fluids in complex mixing flows. The two-dimensional, timeperiodic fluid between eccentric cylinders is used as a prototypical chaotic mixing flow. The multiphase fluid is a dilute dispersion of Newtonian droplets in a Newtonian matrix. The droplets are assumed to be much smaller than the mixer dimensions, and to have no interfacial tension, a situation for which there is an exact, yet compact, model for droplet deformation. We examine the spatial distribution of droplet stretching, as well as global stretching statistics, for a variety of droplet-to-matrix viscosity ratios. Chaotic flows are able to stretch high-viscosity droplets (which cannot be stretched in simple she
ISSN:1746-4471
1743-3533
DOI:10.2495/MPF030251