TERMIUM Plus®

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longueur de mélange [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2004-01-28

English

Subject field(s)
  • Atmospheric Physics
DEF

Mean distance of travel analogous to the mean free path of a molecule, characteristic of a particular motion and over which an eddy maintains its identity.

CONT

mixing length [is] a concept used in the parameterization of turbulent transport processes. According to this model, fluid masses called eddies, distinguishable from the ambient fluid, spring into existence in some undefined way and then, after moving unchanged over a certain path length, become indistinguishable from the surrounding fluid. This path length, over which the eddy mixes with the surrounding fluid, is called the mixing length. This model is analogous to the mean free path of a molecule or atom between collisions.

French

Domaine(s)
  • Physique de l'atmosphère
DEF

Distance moyenne de parcours, analogue au parcours libre moyen d'une molécule, caractéristique d'un écoulement particulier et sur laquelle un tourbillon de turbulence conserve son identité.

Spanish

Campo(s) temático(s)
  • Física de la atmósfera
DEF

Distancia media de recorrido, análoga al recorrido libre medio de una molécula, típica de un movimiento dado y durante la cual el torbellino conserva su identidad.

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Record 2 2004-01-28

English

Subject field(s)
  • Environmental Studies and Analyses
  • Hydrology and Hydrography
DEF

Minimum length of travel of a tracer after which good mixing is obtained.

French

Domaine(s)
  • Études et analyses environnementales
  • Hydrologie et hydrographie
DEF

Longueur minimale que doit parcourir un traceur pour obtenir un bon mélange.

Spanish

Campo(s) temático(s)
  • Estudios y análisis del medio ambiente
  • Hidrología e hidrografía
DEF

Longitud mínima de desplazamiento de un trazador, necesaria para que se obtenga una buena mezcla.

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Record 3 2004-01-23

English

Subject field(s)
  • Atmospheric Physics
  • Aerodynamics and Theory of Gases
DEF

An average distance of air parcel turbulent movement toward a reference height, where the average is a root-mean-square distance.

OBS

It is also known as Prandtl's mixing length, l, after Ludwig Prandtl who devised it in 1925 to explain turbulent fluxes such as the Reynolds stress.

French

Domaine(s)
  • Physique de l'atmosphère
  • Théorie des gaz et aérodynamique
CONT

La longueur l [...] est dite longueur de mélange et a été formulée par Prandtl en 1925. La longueur de mélange peut être considérée comme le rayon d'action des structures turbulentes de plus grosse taille.

CONT

La longueur de mélange de Prandtl et l'analogie de Reynolds.

Spanish

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