Boundary layer

{
  "id": "MLC-T-CHM-001452",
  "term": "Boundary layer",
  "field": "Chemistry",
  "definition": "The thin layer of fluid, either liquid or gas, immediately adjacent to a solid surface, where the fluid's velocity changes significantly from zero at the surface to the free-stream velocity further away. Within this region, viscous forces are dominant, and gradients of velocity, temperature, and concentration are steep. The atmospheric boundary layer extends from the Earth's surface up to about one kilometer.",
  "subject": "Chemistry and the Environment",
  "see_also": [
    "heat flux"
  ],
  "references": [
    "PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2176 (https://doi.org/10.1351/pac199062112167)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/boundary-layer/"
}