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Stokes equivalent diameter [1 record]

Record 1 1991-05-13


Subject field(s)
  • Air Pollution
  • Pollutants
  • Metrology and Units of Measure

the diameter of a hypothetical sphere having unit density and the same terminal settling velocity as the particle in question.


Generally, the particle diameters to which we shall refer are Stokes' (aerodynamic) diameters. Often the density of a particle is not known. Frequently, therefore, an arbitrary value of 1 g/cm3 is assigned to the density of the particle.


  • Pollution de l'air
  • Agents de pollution
  • Unités de mesure et métrologie

Diamètre d'une sphère de masse volumique 1 g.cm-3 dont la vitesse de chute est la même que celle de la particule dans les mêmes conditions de température et d'humidité relative.


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