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INCOMPRESSIBLE FLOW [5 records]

Record 1 2011-08-17

English

Subject field(s)
  • Mathematical Geography
  • Hydrology and Hydrography
DEF

Second-order partial differential equation of the elliptic type.

OBS

In groundwater flow describing the flow of an incompressible, homogeneous fluid through a homogeneous, isotropic non-deformable porous medium, the variable in the equation is the piezometric head or potential.

French

Domaine(s)
  • Géographie mathématique
  • Hydrologie et hydrographie
DEF

Équation aux dérivées partielles du second ordre de type elliptique.

OBS

Dans le cas d'un écoulement souterrain, elle représente l'écoulement d'un fluide homogène incompressible à travers un milieu poreux homogène non déformable. La variable de l'équation est la charge piézométrique ou le potentiel.

Spanish

Campo(s) temático(s)
  • Geografía matemática
  • Hidrología e hidrografía
DEF

Ecuación diferencial en derivadas parciales de segundo orden del tipo elíptico.

OBS

En flujo de aguas subterráneas describe el flujo de un fluido homogéneo e incompresible a través de un medio poroso isotrópico, homogéneo e indeformable. La variable de la ecuación es la altura piezométrica o el potencial.

Save record 1

Record 2 2000-11-21

English

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

Method for solving inviscid, incompressible flow problems, based upon distributing singular solutions over the body surface and computing the singularity strengths such that the boundary conditions are satisfied.

French

Domaine(s)
  • Théorie des gaz et aérodynamique

Spanish

Save record 2

Record 3 1991-04-12

English

Subject field(s)
  • Glaciology
DEF

A flow pattern on glaciers in which the velocity decreases with distance downstream; thus the longitudinal strain rate(velocity gradient) is compressive. This condition requires a transverse or vertical expansion, or a negative net balance on the surface, because ice is almost incompressible.

OBS

Ant.: extending flow

French

Domaine(s)
  • Glaciologie
DEF

Type d'écoulement des glaciers caractérisé par une diminution de la vitesse en fonction de la distance vers l'aval.

CONT

Les dépôts glacio-marins indiquent le vêlage d'icebergs au front du glacier (écoulement en extension) tandis que le till en écailles définit au contraire une moraine de cisaillement, caractéristique d'un écoulement en compression de la glace frontale.

Spanish

Save record 3

Record 4 1990-10-04

English

Subject field(s)
  • Oil Production

French

Domaine(s)
  • Production pétrolière

Spanish

Save record 4

Record 5 1990-02-08

English

Subject field(s)
  • Scientific Measurements and Analyses
  • Statistical Graphs and Diagrams
  • Fluid Mechanics and Hydraulics (Physics)
DEF

The figure described by the extremity of a vector that has a fixed origin and a position vector equal to the velocity of a moving particle.

CONT

Hodograph method : a method used essentially for the study of two-dimensional steady movements of a perfect fluid in which, instead of the coordinates(x, y) of the physical plane, the independent variables taken are the components mu and v of the velocity q with reference to these axes.... The method is applied to determinations of incompressible flow or of compressible flow.

French

Domaine(s)
  • Mesures et analyse (Sciences)
  • Diagrammes et graphiques (Statistique)
  • Mécanique des fluides et hydraulique (Physique)
DEF

Courbe décrite par l'extrémité P d'un vecteur dont l'origine est fixe et qui reste équipollent à la vitesse d'un point sur sa trajectoire.

Spanish

Save record 5

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