Rheology of a dilute suspension: analytical expression for the viscosity in the limit of low zeta-potentials |
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| Authors: | Francisco Jóse Rubio-Hernández Emilio Ruiz-Reina Ana Isabel Gómez-Merino John Denis Sherwood |
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| Affiliation: | (1) Departamento de Física Aplicada II Grupo de Física de Coloides Universidad de Málaga, Campus de El Ejido, E-29013, Málaga, Spain e-mail: fjrubio@uma.es, ES;(2) Schlumberger Cambridge Research, High Cross, Madingley Road, Cambridge CB3 0EL, UK, GB |
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| Abstract: | A modified theoretical model on the primary electroviscous effect, based upon the inclusion of the condition of that the ions within the Stern layer are allowed to move tangential to the surface of the particle, is proposed. Booth's analysis (Booth 1950a), valid for spherical particles at low zeta-potentials, is the start point, and the effect of a dynamic Stern layer is included. The analytic results are compared with full numerical computations and a good agreement is found for zeta-potentials less than 25 mV. Received: 15 June 2000 Accepted: 11 September 2000 |
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| Keywords: | Primary electroviscous effect Dynamic Stern layer Suspensions |
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