Shear thinning of suspensions of sterically stabilized spheres studied by Stokesian dynamics simulations

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Schaink, H.M. and Nommensen, P.A. and Jongschaap, R.J.J. and Mellema, J. (2000) Shear thinning of suspensions of sterically stabilized spheres studied by Stokesian dynamics simulations. Journal of Chemical Physics, 113 (6). pp. 2484-2488. ISSN 0021-9606

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Abstract:Stokesian dynamics simulations are presented of suspensions of sterically stabilized spheres in a viscous medium, subjected to simple shear. The steric repulsion between the grafted polymer layers of different particles is modeled using an interaction potential that is calculated using a self-consistent field lattice theory. The shear rate dependence and the volume fraction dependence of the suspension viscosity are calculated and compared to experimental data [Nommensen et al. Phys. Rev. E 59, 3147 (1999)]. It is found that shear thinning is mainly caused by the interaction contribution to the viscosity. The present paper, combined with a recent paper of Nommensen et al. [Langmuir 16, 1902 (2000)], shows that computer simulations, theoretical analysis, and experimental work give a consistent physical picture of the rheology of these suspensions when the proper interaction potential is used.
Item Type:Article
Copyright:© 2000 American Institute of Physics
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Link to this item:http://purl.utwente.nl/publications/73587
Official URL:http://dx.doi.org/10.1063/1.482066
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Metis ID: 128973