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

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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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Acknowledgements

We would like to thank FONACIT, Venezuela, for the financial support for this work through Conipet project 97–003590.

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Authors and Affiliations

  1. Grupo de Polímeros USB, Departamento de Ciencias de los Materiales, Universidad Simón Bolívar, Caracas, 1080A, Venezuela

    Juan M. González, Alejandro J. Müller & Miguel F. Torres

  2. Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, 85721, USA

    A. Eduardo Sáez

Authors
  1. Juan M. González
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  2. Alejandro J. Müller
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  3. Miguel F. Torres
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  4. A. Eduardo Sáez
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Correspondence to Alejandro J. Müller or A. Eduardo Sáez.

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González, J.M., Müller, A.J., Torres, M.F. et al. The role of shear and elongation in the flow of solutions of semi-flexible polymers through porous media. Rheol Acta 44, 396–405 (2005). https://doi.org/10.1007/s00397-004-0421-4

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  • DOI: https://doi.org/10.1007/s00397-004-0421-4

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