Goldbook title
IUPAC > Gold Book > alphabetical index > S > surface shear viscosity
Gold G Icon
Indexes Download

surface shear viscosity

Also contains definitions of: area viscosity, surface dilatational viscosity

For steady state deformations a surface shear viscosityη s, and an area viscosity or surface dilatational viscosity ζ s can be defined. In a Cartesian system with the x-axis normal to the surface, they are defined by the equations:
η s = σ x y ∂ v y ∂ v x
ζ s = Δ γ d ( ln A ) d t
where σ x y is the shear component of the surface stress tensor, v x and v y are the x and y components of the surface velocity vector, respectively, A is the surface area, t is the time, and Δ γ is the difference between the (steady state) dynamic surface tension and the equilibrium surface tension.
PAC, 1979, 51, 1213 (Manual of symbols and terminology for physicochemical quantities and units. Appendix II: Definitions, terminology and symbols in colloid and surface chemistry. Part 1.13. Selected definitions, terminology and symbols for rheological properties) on page 1218
Interactive Link Maps
First Level Second Level Third Level
Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
Last update: 2014-02-24; version: 2.3.3.
DOI of this term:
Original PDF version: The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.
Current PDF version | Version for print | History of this term