TERMIUM Plus®

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COEFICIENTE ARRASTRE [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2003-08-01

English

Subject field(s)
  • Scientific Measurements and Analyses
  • Atmospheric Physics
  • Chimneys (Building Elements)
DEF

The ratio of lateral entrainment velocity to plume-rise velocity of a smoke plume.

CONT

Smoke plumes that rise through the environment due to buoyancy or momentum become diluted with environmental air, where the rate of dilution is proportional to the rise rate of the plume. The entrainment coefficient is this constant of proportionality. This concept of lateral entrainment does not work well for convective thermals in the atmospheric boundary layer. One reason is that boundary layer thermals are part of a large overturning circulation involving the whole boundary layer during statically unstable conditions of free convection, rather than being thin currents of rising smokestack air.

French

Domaine(s)
  • Mesures et analyse (Sciences)
  • Physique de l'atmosphère
  • Cheminées (Éléments du bâtiment)

Spanish

Campo(s) temático(s)
  • Medición y análisis (Ciencias)
  • Física de la atmósfera
  • Chimeneas (Elementos de edificios)
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Record 2 2003-07-14

English

Subject field(s)
  • Meteorology
  • Fluid Mechanics and Hydraulics (Physics)
DEF

Non-dimensional coefficient (CD) which mathematically measures the effectiveness with which momentum is transferred to a surface: t = CDpu2, where t is the Reynolds stress; p, the air density; and u, the wind speed near a surface (commonly 2 m above ground).

French

Domaine(s)
  • Météorologie
  • Mécanique des fluides et hydraulique (Physique)
DEF

Coefficient sans dimension (CD) qui mesure l'efficacité du transfert de la quantité de mouvement à une surface : t = CDpu2, où t est la tension de Reynolds; p, la densité de l'air; et u, la vitesse du vent près de la surface (ordinairement à 2 m au-dessus du sol).

Spanish

Campo(s) temático(s)
  • Meteorología
  • Mecánica de fluidos e hidráulica (Física)
DEF

Coeficiente adimensional (CD) que mide matemáticamente la efectividad con la cual se transfiere el impulso a una superficie: t = CDru2, en donde t es la tensión de Reynolds, p es la densidad del aire y u es la velocidad del viento cerca de la superficie (ordinariamente a 2 m por encima del suelo).

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