The role of shear and elongation in the flow of solutions of semi-flexible polymers through porous media

Juan M. González; Alejandro J. Müller; Miguel F. Torres; A. Eduardo Sáez

doi:10.1007/s00397-004-0421-4

The role of shear and elongation in the flow of solutions of semi-flexible polymers through porous media

Juan M. González, Alejandro J. Müller, Miguel F. Torres, A. Eduardo Sáez

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

44 Scopus citations

Abstract

The rheological behavior of hydrophobically modified hydroxyethyl cellulose (HMHEC) and xanthan gum solutions has been characterized in simple shear flow, opposed-jets flow, and flow through porous media. Both polymers exhibit shear thinning in simple shear flow and apparent shear thinning in flow through porous media. Analysis of the results shows there is a direct correspondence between shear viscosities determined in simple shear experiments and apparent viscosities in porous media flow at relatively low shear rates. At high shear rates the extensional component of the flow in porous media appreciably increases the apparent viscosity over the simple shear values. This increase is shown to correlate with results obtained in opposed-jets experiments, and is attributed to formation of transient entanglements.

Original language	English (US)
Pages (from-to)	396-405
Number of pages	10
Journal	Rheologica Acta
Volume	44
Issue number	4
DOIs	https://doi.org/10.1007/s00397-004-0421-4
State	Published - Apr 2005

Keywords

Hydrophobically modified hydroxyethyl cellulose
Porous media
Xanthan gum

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Chemical Engineering (miscellaneous)
General Materials Science

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10.1007/s00397-004-0421-4

Cite this

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abstract = "The rheological behavior of hydrophobically modified hydroxyethyl cellulose (HMHEC) and xanthan gum solutions has been characterized in simple shear flow, opposed-jets flow, and flow through porous media. Both polymers exhibit shear thinning in simple shear flow and apparent shear thinning in flow through porous media. Analysis of the results shows there is a direct correspondence between shear viscosities determined in simple shear experiments and apparent viscosities in porous media flow at relatively low shear rates. At high shear rates the extensional component of the flow in porous media appreciably increases the apparent viscosity over the simple shear values. This increase is shown to correlate with results obtained in opposed-jets experiments, and is attributed to formation of transient entanglements.",

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AU - González, Juan M.

AU - Müller, Alejandro J.

AU - Torres, Miguel F.

AU - Sáez, A. Eduardo

PY - 2005/4

Y1 - 2005/4

N2 - The rheological behavior of hydrophobically modified hydroxyethyl cellulose (HMHEC) and xanthan gum solutions has been characterized in simple shear flow, opposed-jets flow, and flow through porous media. Both polymers exhibit shear thinning in simple shear flow and apparent shear thinning in flow through porous media. Analysis of the results shows there is a direct correspondence between shear viscosities determined in simple shear experiments and apparent viscosities in porous media flow at relatively low shear rates. At high shear rates the extensional component of the flow in porous media appreciably increases the apparent viscosity over the simple shear values. This increase is shown to correlate with results obtained in opposed-jets experiments, and is attributed to formation of transient entanglements.

AB - The rheological behavior of hydrophobically modified hydroxyethyl cellulose (HMHEC) and xanthan gum solutions has been characterized in simple shear flow, opposed-jets flow, and flow through porous media. Both polymers exhibit shear thinning in simple shear flow and apparent shear thinning in flow through porous media. Analysis of the results shows there is a direct correspondence between shear viscosities determined in simple shear experiments and apparent viscosities in porous media flow at relatively low shear rates. At high shear rates the extensional component of the flow in porous media appreciably increases the apparent viscosity over the simple shear values. This increase is shown to correlate with results obtained in opposed-jets experiments, and is attributed to formation of transient entanglements.

KW - Hydrophobically modified hydroxyethyl cellulose

KW - Porous media

KW - Xanthan gum

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The role of shear and elongation in the flow of solutions of semi-flexible polymers through porous media

Abstract

Keywords

ASJC Scopus subject areas

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