Title

The Absence of a Rheological Effect on the Spreading of Small Drops

Abstract

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.

Department(s)

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

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2001 American Institute of Physics (AIP), All rights reserved.


Share

 
COinS