Many
colloidal dispersions show Bingham flow which is characterized by a σ-
D diagram as shown. At rates of shear greater than that at point A, the following relation applies:
where
(or
)
is called the Bingham
yield stress,
is the
differential viscosity,
is the
shear rate, and
is the average of three
normal stress components if the deformation is purely dilatational.
Source:
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 1217
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: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
doi:10.1351/goldbook.
