Velocity defect law

{
  "id": "MLC-T-MET-010834",
  "term": "Velocity defect law",
  "field": "Meteorology and atmospheric science",
  "definition": "A principle describing the velocity profile in the outer region of a turbulent boundary layer, away from the surface. It states that the difference between the free-stream velocity and the local mean velocity, when scaled by the friction velocity, is a universal function of the distance from the surface normalized by the boundary layer thickness. This law, along with the law of the wall for the inner layer, provides a complete description of the velocity profile in the atmospheric boundary layer.",
  "url": "https://mlchart.com/terminology/meteorology/velocity-defect-law/"
}