Nature of the divergence in low shear viscosity of colloidal hard-sphere dispersions

by: Zhengdong Cheng, Jixiang Zhu, Paul M Chaikin, See-Eng Phan, William B Russel

Physical Review E, Vol. 65, No. 4. (April 2002), 041405.

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Abstract

Measurements of the low-shear viscosity η o with a Zimm-Crothers viscometer for dispersions of colloidal hard spheres are reported as a function of volume fraction φ up to 0.56. Nonequilibrium theories based on solutions to the two-particle Smoluchoski equation or ideal mode coupling approximations do not capture the divergence. However; the nonhydrodynamic contribution to the relative viscosity Δη o is correlated over a wide range of volume fractions by the Doolittle and Adam-Gibbs equations; indicating an exponential divergence at φ m =0.625±0.015. The data extend the previously proposed master curve; providing a test for improved theories for the many-body thermodynamic and hydrodynamic interactions that determine the viscosity of hard-sphere dispersions.

@article{citeulike:1449898, abstract = {Measurements of the low-shear viscosity η o with a Zimm-Crothers viscometer for dispersions of colloidal hard spheres are reported as a function of volume fraction φ up to 0.56. Nonequilibrium theories based on solutions to the two-particle Smoluchoski equation or ideal mode coupling approximations do not capture the divergence. However; the nonhydrodynamic contribution to the relative viscosity Δη o is correlated over a wide range of volume fractions by the Doolittle and Adam-Gibbs equations; indicating an exponential divergence at φ m =0.625±0.015. The data extend the previously proposed master curve; providing a test for improved theories for the many-body thermodynamic and hydrodynamic interactions that determine the viscosity of hard-sphere dispersions.}, author = {Cheng, Zhengdong and Zhu, Jixiang and Chaikin, Paul M. and Phan, See-Eng and Russel, William B. }, citeulike-article-id = {1449898}, doi = {http://dx.doi.org/10.1103/PhysRevE.65.041405}, journal = {Physical Review E}, keywords = {colloids, density, shear, theory, viscosity}, month = {April}, number = {4}, pages = {041405+}, posted-at = {2008-04-28 20:42:09}, priority = {2}, publisher = {American Physical Society}, title = {Nature of the divergence in low shear viscosity of colloidal hard-sphere dispersions}, url = {http://dx.doi.org/10.1103/PhysRevE.65.041405}, volume = {65}, year = {2002} }

RIS record

TY - JOUR ID - citeulike:1449898 L3 - citeulike-article-id:1449898 TI - Nature of the divergence in low shear viscosity of colloidal hard-sphere dispersions JF - Physical Review E VL - 65 IS - 4 SP - 041405 PB - American Physical Society N2 - Measurements of the low-shear viscosity η o with a Zimm-Crothers viscometer for dispersions of colloidal hard spheres are reported as a function of volume fraction φ up to 0.56. Nonequilibrium theories based on solutions to the two-particle Smoluchoski equation or ideal mode coupling approximations do not capture the divergence. However; the nonhydrodynamic contribution to the relative viscosity Δη o is correlated over a wide range of volume fractions by the Doolittle and Adam-Gibbs equations; indicating an exponential divergence at φ m =0.625±0.015. The data extend the previously proposed master curve; providing a test for improved theories for the many-body thermodynamic and hydrodynamic interactions that determine the viscosity of hard-sphere dispersions. KW - colloids KW - density KW - shear KW - theory KW - viscosity AU - Cheng, Zhengdong AU - Zhu, Jixiang AU - Chaikin, Paul AU - Phan, See-Eng AU - Russel, William PY - 2002/04// UR - http://dx.doi.org/10.1103/PhysRevE.65.041405 ER -

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