TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

A Reynolds number above which the flow in the boundary layer no longer remains laminar but becomes turbulent.  1, record 1, English, - critical%20Reynolds%20number

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Nombre de Reynolds pour lequel se produit le changement de régime [...] de laminaire à turbulent.  1, record 1, French, - nombre%20de%20Reynolds%20critique

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

The layer immediately next to a fixed boundary in which laminar flow prevails.  4, record 2, English, - laminar%20boundary%20layer

Record number: 2, Textual support number: 1 CONT

Aircraft... in general,... are not certified to fly with any contamination [(e. g. possible contaminants : frost, squashed bugs, anti-icing fluids, etc.) ] on the lift and control surfaces. However,... small amounts of surface contamination usually result in roughness. This causes local changes in the pressure gradient in the boundary layer and can cause turbulence in a laminar flow boundary layer or complete flow separation from the surface.  3, record 2, English, - laminar%20boundary%20layer

Record number: 2, Textual support number: 2 CONT

Above a surface, a laminar layer will develop and fluid velocity will increase with distance from the surface, but not indefinitely. At some point, flow will become turbulent, with the laminar sublayer separating the turbulent layer from the surface. In the real world, most laminar boundary layers are extremely thin(order of 1 mm), but can be of biological importance, for example, next to plant leaves or as invertebrate refuges in streams.  5, record 2, English, - laminar%20boundary%20layer

Record number: 2, Textual support number: 1 OBS

... flow is smooth and nonturbulent.  5, record 2, English, - laminar%20boundary%20layer

Record number: 2, Textual support number: 2 OBS

The equations of motion of the fluid in the laminar boundary layer are the Navier-Stokes equations containing only the inertia and molecular viscosity terms.  6, record 2, English, - laminar%20boundary%20layer

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Couche voisine d'une surface limite donnée dans laquelle les forces de viscosité moléculaire sont grandes parce que le gradient de vitesse normal à la surface limite est élevé.  2, record 2, French, - couche%20limite%20laminaire

Record number: 2, Textual support number: 1 CONT

La présence d'une couche limite laminaire à la surface de notre peau limite notamment nos échanges de chaleur avec l'air extérieur et permet de maintenir la température de surface de nos mains ou de notre figure à une valeur voisine de 30 °C même si l'air extérieur est froid.  3, record 2, French, - couche%20limite%20laminaire

Record number: 2, Textual support number: 1 OBS

Les équations du mouvement du fluide dans la couche limite laminaire sont les équations de Navier-Stokes ne contenant que les termes d'inertie et de viscosité moléculaire.  2, record 2, French, - couche%20limite%20laminaire

Record 2,  Textual support,  Spanish

Record number: 2, Textual support number: 1 DEF

Capa inmediata a una superficie límite dada en la cual son elevadas las fuerzas de viscosidad molecular porque es alto el gradiente de velocidad normal a la superficie límite.  1, record 2, Spanish, - capa%20l%C3%ADmite%20laminar

Record number: 2, Textual support number: 1 OBS

Las ecuaciones de movimiento del fluido en la capa límite laminar son las de Navier-Stokes, que contienen sólo los términos de inercia y de viscosidad molecular.  1, record 2, Spanish, - capa%20l%C3%ADmite%20laminar

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 OBS

--the transition from laminar to turbulent flow in a boundary layer.  1, record 3, English, - boundary%20layer%20transition

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 OBS

la séparation entre la couche limite laminaire et la couche limite turbulente est appelée --.  1, record 3, French, - transition%20de%20la%20couche%20limite

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

the temperature at which a substance is converted from one state to another.  3, record 4, English, - transition%20point

Record number: 4, Textual support number: 2 DEF

the point of change from laminar to turbulent flow in a boundary layer.  4, record 4, English, - transition%20point

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 DEF

Température à laquelle une substance passe d'une phase à une autre.  3, record 4, French, - temp%C3%A9rature%20de%20transition

Record 4,  Textual support,  Spanish

Record number: 4, Textual support number: 1 DEF

Temperatura a la cual una substancia cambia de estado de agregación a otro (transición de primer orden), o bien, temperatura de culminación de un cambio gradual, tal como el punto lamda, o el punto Curie (transición de segundo orden).  4, record 4, Spanish, - punto%20de%20transici%C3%B3n

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 CONT

Noise from cavitating hydrofoils as influenced by boundary-layer development. [Paper by] William K. Blake and F. Ellsworth Geib, Jr.(...). This paper describes measurements of noise from cavitating flow over a hydrofoil.(Cavitation was generated on a hydrofoil in the presence of a separated laminar boundary layer on the one hand and of a fully turbulent attached boundary layer on the other).  2, record 5, English, - cavitating

Record number: 5, Textual support number: 1 OBS

cavitation: Disturbance around revolving propeller blades struts, etc., caused by collapse of transient pressure disturbances resulting from flow of water over their surfaces.  3, record 5, English, - cavitating

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 DEF

Produisant un mouvement de cavitation.  2, record 5, French, - cavitant

Record number: 5, Textual support number: 1 CONT

[L'hydroptère] se justifie à chaque fois qu'il est souhaitable de disposer d'une plate-forme très stable: ce peut être le cas des utilisateurs militaires, lorsque l'hydroptère est utilisé comme plate-forme de tir. D'où l'intérêt manifesté par l'U.S. Navy et l'OTAN: côté vitesse, des progrès peuvent être attendus de l'utilisation sur les ailettes de profils cavitants et super-cavitants (profils à "base ventilée", etc.).  3, record 5, French, - cavitant

Record number: 5, Textual support number: 1 OBS

cavitation: Phénomène qui se produit lorsqu'une hélice tourne trop vite: l'air contenu dans l'eau forme une cavité gazeuse autour des pales de l'hélice qui tourne alors dans le vide.  4, record 5, French, - cavitant

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 CONT

The McDonnell Douglas proposal for a practical laminar flow system is based on perforated skins through which the boundary layer is sucked away in flight.  1, record 6, English, - laminar%20flow%20system

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 CONT

Le système de laminéarisation de l'écoulement proposé par McDonnell Douglas fait appel à des revêtements perforés permettant l'aspiration de la couche limite en vol.  1, record 6, French, - syst%C3%A8me%20de%20lamin%C3%A9arisation%20de%20l%27%C3%A9coulement

Record 6,  Textual support,  Spanish