Differential viscosity

{
  "id": "MLC-T-CHM-003179",
  "term": "Differential viscosity",
  "field": "Chemistry",
  "definition": "The ratio of the differential shear stress to the differential shear rate for a non-Newtonian fluid. It represents the instantaneous resistance to flow at a specific shear rate, rather than an average over a range. This quantity is particularly relevant for fluids whose viscosity changes with the applied shear rate, such as polymer solutions or suspensions, and is often determined from the slope of a flow curve.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "shear rate"
  ],
  "references": [
    "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 (https://doi.org/10.1351/pac197951051213)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/differential-viscosity/"
}