Stokes equation

{
  "id": "MLC-T-CHM-011436",
  "term": "Stokes equation",
  "field": "Chemistry",
  "definition": "An equation that describes the drag force experienced by a spherical particle moving through a viscous fluid at low Reynolds numbers. It relates the drag force to the particle's radius, the fluid's viscosity, and the particle's velocity. This equation is often applied in polymer science to estimate the hydrodynamic radius of macromolecules in solution from their sedimentation velocity.",
  "subject": "Polymer",
  "see_also": [
    "equivalent hydrodynamic radius",
    "translational frictional coefficient"
  ],
  "references": [
    "PAC, 2015, 87, 71. 'Definitions of terms relating to individual macromolecules, macromolecular assemblies, polymer solutions, and amorphous bulk polymers (IUPAC Recommendations 2014)' on page 103 (https://doi.org/10.1515/pac-2013-0201)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/stokes-equation/"
}