TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

Irregularity in the diffusion of solute molecules that occurs in a porous chromatographic support, by the rapid process of mixing of the swirling eddies of the fluid. The phenomenon is due to the fact that (a) the pathlength for some solute molecules is either shorter or longer than that for the bulk of the molecules; and (b) the rate of solvent flow varies in different regions of the porous support.  2, record 1, English, - Eddy%20diffusion

Record number: 1, Textual support number: 1 CONT

Non-ideal flow occurs when different elements of substrate move through the reactor at varying rates such that they are in contact with the enzyme for variable periods owing to their differing residence times in the reactor giving an opportunity for different extents of reaction to take place and for further reaction of the desired product and side-reactions to take place. Non-ideal flow can be caused by factors such as back-mixing, channelling, or the presence of stagnant flow regions within the reactors.... Eddy diffusion also causes inhomogeneous distribution of fluid. This effect occurs when there are variations in the size and shape of the support particles and because of the tendency of the larger particles to become packed close to the walls of the column such that the flow rate varies over the cross-section of the column.  3, record 1, English, - Eddy%20diffusion

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

Les utilisations délibérées les plus anciennes et les plus courantes de la turbulence concernent l'intensification des transferts de chaleur et de matière au sein des fluides ou vers les parois qui les limitent. Dans le second cas, l'effet de la diffusion moléculaire à proximité immédiate de la paroi est déterminant, car la diffusion turbulente y tend vers zéro dans les sous-couches visqueuses sur parois lisses, ou y intervient par des forces de pression à petite échelle sans action sur le transfert de contaminants scalaires sur parois rugueuses.  1, record 1, French, - diffusion%20turbulente

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

Diffusion which occurs in turbulent flow, by the rapid process of mixing of the swirling eddies of fluid.  3, record 2, English, - eddy%20diffusion

Record number: 2, Textual support number: 1 OBS

eddy: A vortexlike motion of a fluid running contrary to the main current.  3, record 2, English, - eddy%20diffusion

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Diffusion de matière ou des propriétés de particules d'air, telles que la chaleur et la quantité de mouvement, par les tourbillons d'un flux turbulent.  2, record 2, French, - diffusion%20turbulente

Record 2,  Textual support,  Spanish

Record number: 2, Textual support number: 1 DEF

Difusión de materia o de las propiedades de partículas de aire, como el calor y la cantidad de movimiento, por los remolinos de un flujo turbulento.  3, record 2, Spanish, - difusi%C3%B3n%20turbulenta

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

Advection of these small clouds depends on local velocity field, and they are subject to turbulent diffusion, which is modeled by the four-thirds power law ...  1, record 3, English, - turbulent%20diffusion

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 CONT

Ces petits nuages sont advectés en fonction du champ de vitesse local et ils subissent une dispersion turbulente qui est modélisée par la loi de puissance à la quatre tiers [...]  1, record 3, French, - dispersion%20turbulente

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

Dispersion model. A mathematical representation and solution of the physical processes that result in the spread of pollutants in the atmosphere. The phenomenon of direct interest in predicting the dispersion of pollutants is turbulent diffusion. Consequently dispersion models are sometimes called diffusion models. However, turbulent diffusion and diffusion models are misnomers. ... The spreading is really not due to a "diffusion" phenomenon such as results from molecular collisions but rather is a result of the rapid, irregular motion of lumps of fluid (called eddies) in turbulence.  4, record 4, English, - dispersion%20model

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 CONT

On a utilisé deux modèles de dispersion : le modèle Lagrangien et le modèle par Trajectoires. Bien que ces deux modèles soient basés sur les mêmes équations, hypothèses et approximations, le modèle par Trajectoires est destiné à estimer les effets produits par les émissions d'un pays quelconque sur les concentrations et les dépôts d'un autre pays, tandis que le modèle Lagrangien convient plutôt pour fournir une estimation d'ensemble du transport des polluants à l'échelle européenne.  3, record 4, French, - mod%C3%A8le%20de%20dispersion

Record number: 4, Textual support number: 1 OBS

Il faut rappeler qu'un modèle, qui viserait à représenter vraiment la diffusion moléculaire et non la dispersion, pourrait correctement porter le nom de modèle de diffusion. En pratique, dans le langage courant et chez les spécialistes, on confond les termes diffusion et dispersion.  4, record 4, French, - mod%C3%A8le%20de%20dispersion

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 OBS

"Longitudinal" = erreur. "Turbulent" = terme juste.  1, record 5, French, - coefficient%20de%20diffusion%20turbulente

Record number: 5, Textual support number: 2 OBS

Cahier Enviroguide chlorate de sodium, chap. 5.  1, record 5, French, - coefficient%20de%20diffusion%20turbulente

Record 5,  Textual support,  Spanish