Abstract
FOR infinitely diluted suspensions of rigid spheres, Einstein1 derived on a rigorously theoretical basis the formula η = η0 (1 + kc),... (1) where η is the viscosity of the suspension, η0 is the viscosity of the pure solvent, c is the concentration by volume and k = 2·5 is a constant. It has been shown that (1) is also valid for non-spherical particles, the factor k being a function of their shape, rigidity and Brownian movement. For elongated rigid particles, k > 2·5.
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References
Einstein, A., Ann. Phys., iv, 19, 289 (1906); 34, 591 (1911).
Eirich, F., Bunzl and Margaretha, Koll.-Z., 74, 276 (1936).
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VAND, V. Theory of Viscosity of Concentrated Suspensions. Nature 155, 364–365 (1945). https://doi.org/10.1038/155364b0
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DOI: https://doi.org/10.1038/155364b0
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