Influence of polymer conformation on the entrance length in capillary flow

Leonor Pérez-Trejo; Arturo F. Méndez-Sánchez; José Pérez-González; Lourdes De Vargas

doi:10.1007/BF00396046

Influence of polymer conformation on the entrance length in capillary flow

Leonor Pérez-Trejo, Arturo F. Méndez-Sánchez, José Pérez-González, Lourdes De Vargas

Escuela Superior de Física y Matemáticas (ESFM)

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

An analysis of the flow of polymer solutions through capillaries by means of pressure profiles was performed in this work. The experiments were carried out with aqueous solutions of flexible and semirigid macromolecules, Polyox and Xanthan respectively. The influence of the macromolecules' conformation on the flow field development is reflected on the different magnitudes of the entry length, being of the order of 60 diameters for the solutions of rigid macromolecules, and of the order of 10 diameters for flexible ones. In addition, the calculated end effects were larger for the rigid macromolecules than for the flexible ones. From these results, it is found that an increase in the entrance length is observed when the pseudoplastic behavior of the polymer solutions is increased.

Original language	English
Pages (from-to)	194-201
Number of pages	8
Journal	Rheologica Acta
Volume	35
Issue number	2
DOIs	https://doi.org/10.1007/BF00396046
State	Published - 1996

Keywords

Capillary rheometer
Entrance length
Polymer conformation
Polymer solutions
Pressure profiles

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10.1007/BF00396046

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title = "Influence of polymer conformation on the entrance length in capillary flow",

abstract = "An analysis of the flow of polymer solutions through capillaries by means of pressure profiles was performed in this work. The experiments were carried out with aqueous solutions of flexible and semirigid macromolecules, Polyox and Xanthan respectively. The influence of the macromolecules' conformation on the flow field development is reflected on the different magnitudes of the entry length, being of the order of 60 diameters for the solutions of rigid macromolecules, and of the order of 10 diameters for flexible ones. In addition, the calculated end effects were larger for the rigid macromolecules than for the flexible ones. From these results, it is found that an increase in the entrance length is observed when the pseudoplastic behavior of the polymer solutions is increased.",

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T1 - Influence of polymer conformation on the entrance length in capillary flow

AU - Pérez-Trejo, Leonor

AU - Méndez-Sánchez, Arturo F.

AU - Pérez-González, José

AU - De Vargas, Lourdes

PY - 1996

Y1 - 1996

N2 - An analysis of the flow of polymer solutions through capillaries by means of pressure profiles was performed in this work. The experiments were carried out with aqueous solutions of flexible and semirigid macromolecules, Polyox and Xanthan respectively. The influence of the macromolecules' conformation on the flow field development is reflected on the different magnitudes of the entry length, being of the order of 60 diameters for the solutions of rigid macromolecules, and of the order of 10 diameters for flexible ones. In addition, the calculated end effects were larger for the rigid macromolecules than for the flexible ones. From these results, it is found that an increase in the entrance length is observed when the pseudoplastic behavior of the polymer solutions is increased.

AB - An analysis of the flow of polymer solutions through capillaries by means of pressure profiles was performed in this work. The experiments were carried out with aqueous solutions of flexible and semirigid macromolecules, Polyox and Xanthan respectively. The influence of the macromolecules' conformation on the flow field development is reflected on the different magnitudes of the entry length, being of the order of 60 diameters for the solutions of rigid macromolecules, and of the order of 10 diameters for flexible ones. In addition, the calculated end effects were larger for the rigid macromolecules than for the flexible ones. From these results, it is found that an increase in the entrance length is observed when the pseudoplastic behavior of the polymer solutions is increased.

KW - Capillary rheometer

KW - Entrance length

KW - Polymer conformation

KW - Polymer solutions

KW - Pressure profiles

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DO - 10.1007/BF00396046

M3 - Artículo

SN - 0035-4511

VL - 35

SP - 194

EP - 201

JO - Rheologica Acta

JF - Rheologica Acta

IS - 2

ER -

Influence of polymer conformation on the entrance length in capillary flow

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Keywords

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