Journal ArticleDOI
Anomalous effects in laminar capillary flow of polymer solutions
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In this paper, the results of an investigation of the anomalous behavior of aqueous hydroxyethyl cellulose (Natrosol-250G) solutions in the vicinity of solid surfaces, in laminar flow through capillary tubes, are presented.About:
This article is published in Chemical Engineering Science.The article was published on 1970-01-01. It has received 43 citations till now. The article focuses on the topics: Laminar flow & Shear stress.read more
Citations
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Migration of macromolecules under flow: the physical origin and engineering implications
TL;DR: In this article, the authors review the experimental evidence, especially the anomalous experimental observations of interest to engineers, concerned with enhancement (which is sometimes rather dramatic) in heat, mass and momentum transfer during the flow of such sliding fluids.
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Macromolecules in nonhomogeneous velocity gradient fields. II
TL;DR: In this paper, a bead-spring model for nonhomogeneous flows is proposed and compared with the available experimental data in the concentric cone geometry, and linear springs are found to over-predict the migration somewhat, but all qualitative features of the phenomenon are well represented.
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Inhomogeneous flows of non-newtonian fluids: generation of spatial concentration gradients
TL;DR: In this paper, the conformation of polymer molecules or of micelles is known to change when a stress or deformation-rate field is applied to a fluid, and the resulting entropy changes must lead to diffusion of the species effected toward regions of minimum stress level in any system in which the stress varies with position.
Journal ArticleDOI
Effective viscosity of dilute polymer solutions near confining boundaries
James H. Aubert,Matthew Tirrell +1 more
TL;DR: In this paper, the problem of a bead-spring model macromolecule in the presence of impenetrable interfaces is studied and equilibrium partition coefficients are calculated for various pore geometries and compared to data on partitioning in porous chromatographic columns.
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Mat formation and unstable flows of highly filled suspensions in capillaries and continuous processors
TL;DR: In this article, the authors investigated the capillary flow and extrusion of highly filled suspensions of ammonium sulfate and other salt fillers in a poly(butadiene acrylonitrile acrylic acid), PBAN matrix.
References
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Preliminary report on the influence of adsorption on capillary dimensions of viscometers
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Non-Newtonian flow through packed beds and porous media
W. Kozicki,C.J. Hsu,C. Tiu +2 more
TL;DR: In this paper, the Blake-Kozeny model has been used for viscous flow of an arbitrary time-independent non-Newtonian fluid through packed beds and porous media.
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The interpretation of observed pressure gradients in laminar flow of non-newtonian liquids through tubes
TL;DR: In this paper, it is shown that anomalous flow of a non-Newtonian liquid near a rigid boundary can be detected by plotting the apparent fluidity (as given by Poiseuille's formula) against the reciprocal of the shear stress at the wall in laminar flow through tubes of various diameters.
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Detection of a wall effect in laminar flow of solutions of a linear polymer
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Anomalous wall effects and associated drag reduction in turbulent flow
W. Kozicki,C. Tiu +1 more
TL;DR: In this paper, an analysis of the anomalous behaviour and associated drag reduction encountered primarily in the turbulent flow of viscoelastic non-Newtonian fluids was conducted and it was shown that these fluids conform to the same general correlation scheme formulated for the purely viscous fluids when allowance is made for an effective velocity of slip at the wall attributable primarily to an increased laminar sub-layer thickness.