Bingham flow

https://doi.org/10.1351/goldbook.B00650
Many @[email protected] 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: \[\sigma - \sigma _{\text{B}}=\eta _{\Delta }\ D\] where \(\sigma _{\text{B}}\) (or \(\tau _{\text{B}}\) ) is called the Bingham @[email protected], \(\eta _{\Delta }\) is the @[email protected], \(D\) is the @[email protected], and \(\sigma \) is the average of three @[email protected] components if the deformation is purely dilatational.
B00650.png
Source:
PAC, 1979, 51, 1213. (Terminology and Symbols in Colloid and Surface Chemistry Part 1.13. Definitions, Terminology and Symbols for Rheological Properties) on page 1217 [Terms] [Paper]