TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

The layer immediately next to a fixed boundary in which laminar flow prevails.  4, record 1, English, - laminar%20boundary%20layer

Record number: 1, 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 1, English, - laminar%20boundary%20layer

Record number: 1, 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 1, English, - laminar%20boundary%20layer

Record number: 1, Textual support number: 1 OBS

... flow is smooth and nonturbulent.  5, record 1, English, - laminar%20boundary%20layer

Record number: 1, 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 1, English, - laminar%20boundary%20layer

Record 1,  Textual support,  French

Record number: 1, 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 1, French, - couche%20limite%20laminaire

Record number: 1, 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 1, French, - couche%20limite%20laminaire

Record number: 1, 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 1, French, - couche%20limite%20laminaire

Record 1,  Textual support,  Spanish

Record number: 1, 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 1, Spanish, - capa%20l%C3%ADmite%20laminar

Record number: 1, 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 1, Spanish, - capa%20l%C3%ADmite%20laminar

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

Line that indicates the direction followed by groundwater toward points of discharge.  4, record 2, English, - flow%20line

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Trajectoire suivie par une particule d’eau, quand son mouvement est soumis à des conditions d’écoulement permanent et laminaire.  4, record 2, French, - ligne%20de%20courant

Record number: 2, Textual support number: 2 DEF

Ligne idéale qui représente la trajectoire théorique - macroscopique - d’une particule d’eau en mouvement dans un aquifère, tangente en tous points au vecteur vitesse.  5, record 2, French, - ligne%20de%20courant

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

Among the classes of mass-transport phenomena in liquids, thermal diffusion (the Soret effect) is ... characterized by the existence of a spontaneous matter flux in an inhomogeneously heated fluid mixture, this flux tending to separate the constituents. ... From a more industrial point of view, whenever multiconstituent liquids are submitted to long-lasting temperature gradients, they are liable to experience thermal diffusive flows, modifying the distribution of the species concentration. Among the cases where this effect has been emphasized, we can mention the elaboration of high technology materials (solidification of semiconductors), the production or purification of light metals ... and the optimization of petroleum extraction (by modelling of the hydrocarbon distribution in the reservoirs). So, knowledge of quantitative values of the Soret coefficient (which is the parameter characteristic of the phenomenon) for a wide domain of materials, in various thermodynamic conditions and physical configurations is needed for the above-mentioned basic and applied purposes. ... The experimental determination of Soret coefficients in binary mixtures, denoted S_T, is obtained by measuring the steady concentration gradient produced by the imposition of a constant and uniform temperature gradient. This concentration gradient achieves a stationary state when thermal diffusion and interdiffusion (which tends to rehomogenize the mixture) exactly compensate each other.  1, record 3, English, - Soret%20coefficient

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 CONT

M. Daguenet, Calcul du flux limite de diffusion en présence d’un gradient thermique sur une surface réactionnelle plane immergée dans une solution en mouvement laminaire. Application à la mesure du coefficient de Soret dans les liquides. C. R. A. S., Paris, 267, pp. 665-668(1968).  1, record 3, French, - coefficient%20de%20Soret

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  French

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 OBS

The filter mass, within which there is a laminar flow, acts as an excellent flocculator for the microscopic floc formed ...  1, record 5, English, - microscopic%20floc

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 OBS

La masse filtrante, à l'intérieur de laquelle le mouvement est laminaire, joue, vis-à-vis du floc microscopique [...] formé, le rôle d’un excellent floculateur.  1, record 5, French, - floc%20microscopique

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 OBS

When air passes over land or water surfaces the lower atmosphere may be divided into three layers; the laminar layer (...) in which flow is laminar, is only in the order of a few millimeters in thickness. In this layer, the temperature, humidity and wind velocity vary almost linearly with height (...)  1, record 6, English, - laminar%20layer

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 OBS

Lorsque l'air circule au-dessus des terres ou des surfaces d’eau, on peut fractionner la basse atmosphère en trois couches : la couche laminaire(...) dans laquelle le mouvement est de type laminaire n’ a que quelques millimètres d’épaisseur. Au niveau de cette couche, la température, l'humidité et la vitesse du vent varient d’une façon presque linéaire avec la hauteur.  1, record 6, French, - couche%20laminaire

Record 6,  Textual support,  Spanish