The Einstein Relation between Relative Viscosity and Volume Concentration of Suspensions of Spheres

Abstract

WE are indebted to Mr. Hughes for directing our attention to the fact that the equation given by Bingham for the fluidity of a suspension may be developed to give the relationship as in the M.Sc. thesis of Hughes, a copy of which he has kindly allowed us to peruse. In the equation, η_r is the relative viscosity of a suspension having a volumetric concentration c of the solid phase; k is a constant.