Perturbation motion

{
  "id": "MLC-T-MET-007878",
  "term": "Perturbation motion",
  "field": "Meteorology and atmospheric science",
  "definition": "The component of fluid motion that deviates from a defined mean or basic state. This decomposition, known as Reynolds decomposition, separates the total flow into a steady or slowly varying part (the mean flow) and a fluctuating part representing turbulence or eddies. The product of perturbation velocities gives rise to Reynolds stresses, which represent the transfer of momentum by turbulence.",
  "url": "https://mlchart.com/terminology/meteorology/perturbation-motion/"
}