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VISCOSIDAD TURBULENCIA [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)
  • Astrophysics and Cosmography
  • Meteorology
  • Air Pollution
DEF

The layer of transition between the surface boundary layer (where the shearing stress is constant) and the free atmosphere (where the atmosphere is treated as an ideal fluid in approximate geostrophic equilibrium).

CONT

The depth of the Ekman layer is on the order of a kilometer in the air and 100m in the ocean.

OBS

In Ekman's analysis, the coefficient of eddy viscosity is assumed constant within this layer; subsequent calculations have relaxed this assumption.

OBS

Ekman layer. ... Together with the surface boundary layer, it makes up the planetary boundary layer.

French

Domaine(s)
  • Astrophysique et cosmographie
  • Météorologie
  • Pollution de l'air
DEF

Partie de la troposphère située entre l'atmosphère libre et la couche limite de surface.

OBS

Cette couche s'étend entre cent et huit cents mètres d'altitude.

OBS

Dans l'analyse d'Ekman, le coefficient de viscosité du tourbillon est supposé constant à l'intérieur de cette couche; des calculs ultérieurs ont tempéré cette hypothèse.

Spanish

Campo(s) temático(s)
  • Astrofísica y cosmografía
  • Meteorología
  • Contaminación del aire
DEF

Capa de transmisión entre la capa límite superficial (en donde la tensión cortante es constante) y la atmósfera libre (en donde la atmósfera se trata como un fluido ideal en equilibrio geostrófico aproximado).

OBS

En el análisis de Ekman, el coeficiente de viscosidad de la turbulencia se supone constante en el interior de esta capa; ulteriores cálculos han relajado esa hipótesis.

Save record 1

Record 2 2002-04-23

English

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

The virtual viscosity resulting from the interaction of eddies within a turbulent flow.

OBS

eddy viscosity ... These eddies effect an exchange of momentum between adjacent layers in a manner similar to, but on a far larger scale than, the exchange of molecules in molecular viscosity.

French

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

Viscosité virtuelle résultant de l'interaction des tourbillons de turbulence dans un flux turbulent.

OBS

viscosité turbulente [...] Ces tourbillons amènent un échange de quantité de mouvement entre les couches adjacentes d'une manière analogue, mais à beaucoup plus grande échelle, à celle de l'échange des molécules dans la viscosité moléculaire.

Spanish

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

Viscosidad virtual debida a la interacción entre los remolinos en una corriente turbulenta.

OBS

viscosidad de la turbulencia :[...] Estos remolinos realizan un intercambio de cantidad de movimiento entre capas adyacentes de una manera semejante al intercambio de moléculas en el caso de la viscosidad molecular, pero en una escala mucho mayor.

Save record 2

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