A Theoretical Description of a Dilute Emulsion of Very Viscous Drops Undergoing Unsteady Simple Shear


          

刊名：Journal of Fluids Engineering
作者：T. F. Oliveira（University of Brasilia, Faculty UnB Gama, Department of Energy）
F. R. Cunha（University of Brasilia, Department of Mechanical Engineering, Fluid Mechanics of Complex Flows Lab-VORTEX）
刊号：780B0001
ISSN：0098-2202
出版年：2011
年卷期：2011, vol.133, no.10
页码：101208-1--101208-8
总页数：8
分类号：TH; TB9; TH16; O35
关键词：Emulsion；Viscous drop；Rheology；Shear flows；Viscoelasticity integral
参考中译：
语种：eng
文摘：This theoretical work shows how the knowledge of the emulsion microscale, including drop stretching and orientation leads to a continuum description of emulsion flows. A first order small deformation theory is explored for describing the rheology of an emulsion of high viscosity drops undergoing unsteady shear flows. The stationary shape and the interfacial velocity of a drop are used in order to obtain the contribution of the drop to the effective stress tensor of the emulsion. A complex rheology including the nonlinear frequency response of the emulsion under oscillatory shear at arbitrary frequency forcing and strain amplitude is identified.



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