The New Jersey Institute of Technology's
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Title:	Stability of bicomponet polymeric liquids in poiseuille flow
Author:	Jeng, Chin-Chang
View Online:	njit-etd1984-028 (73 leaves in various foliations pages ~ 1.7 MB pdf)
Department:	Department of Chemical Engineering and Chemistry
Degree:	Master of Science
Program:	Chemical Engineering
Document Type:	Thesis
Advisory Committee:	Wong, Wing T. (Committee chair) Lewandowski, Gordon (Committee member) Lin, Chen-Chong (Committee member)
Date:	1984-09
Keywords:	Non-Newtonian fluids Viscous flow Polymers and polymerization Fluid dynamics
Availability:	Unrestricted
Abstract:	Polymer processing, involving two or more components, has become more popular recently in industrial plants. However, product Quality is affected very much by the fluid stability. Some theoretical and experimental results concerning Newtonian and non-Newtonian flow in rectangular coordinates, have been published, and the fluid-fluid interfaces were observed to be unstable by some researchers. In this paper, the linear stability of bicomponent non-Newtonian fluids flowing in a cylindrical tube was investigated by using the Ellis model. Only the very long wave and the axisymmetric disturbances were considered. The Ellis zero-shear-rate viscosity ratio, m( = η02 / η01 )destabilizing. The half-zero-shear-rate-viscosity stress ratio, γ ( = τ01 /τ02), was shown to have a stabilizing effect. The power factor, α1 and α2, have monotonous destabilizing effects. Surface tension, in general, will play a stabilizing role at the fluid-fluid interfaces.