The Absence of a Rheological Effect on the Spreading of Small Drops
The method of Joanny and de Gennes of equating the rate of viscous dissipation to the rate of surface work is used for two kinds of non-Newtonian fluids, one in which the rheological coefficients are not constants but the constitutive equation allows no normal stresses (Ellis' model) and the other in which the coefficients are constants but normal stresses arise. the result for the wetting rate and the manner in which it depends on dynamic contact angle which essentially arise from the balance between the viscous and the surface forces are discussed.
R. M. Yazdani and P. Neogi, "The Absence of a Rheological Effect on the Spreading of Small Drops," Journal of Chemical Physics, American Institute of Physics (AIP), Nov 2001.
The definitive version is available at http://dx.doi.org/10.1063/1.1415455
Chemical and Biochemical Engineering
Keywords and Phrases
Approximation Theory; Equations of Motion; Fluid Mechanics; Mathematical Models; Molecular Structure; Non Newtonian Liquids; Polymer Chain; Pressure Effects; Reaction Kinetics; Rheology; Shear Rate; Shear Stress; Surface Tension; Viscosity of Liquids; Viscous Dissipation; Wetting; Zero-Shear Viscosity
Article - Journal
© 2001 American Institute of Physics (AIP), All rights reserved.