Viscous behavior of concentrated emulsions of two immiscible Newtonian fluids with interfacial tension.
A new equation for the relative viscosity of infinitely dilute emulsions of noncolloidal droplets is proposed using the analogy between shear modulus and shear viscosity. In the limit of capillary number -->0, the proposed equation reduces to the well-known Taylor viscosity law for infinitely dilute emulsions. Starting from the proposed equation for an infinitely dilute emulsion, new viscosity equations for concentrated emulsions are then developed using a differential scheme. The proposed equations for concentrated emulsions are evaluated in light of a large body of published experimental data on the viscosity of emulsions.
Pal
Rajinder
R
Department of Chemical Engineering, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada. rpal@engmail.uwaterloo.ca