TERMIUM Plus®

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EQUILIBRIUM SPEED [4 records]

Record 1 2016-07-26

English

Subject field(s)
  • Physics
  • Engineering
  • Rail Transport Operations
  • Railroad Maintenance
DEF

The speed at which the combination of curvature and superelevation exactly balances the centrifugal acceleration.

OBS

equilibrium speed : term officially approved by Canadian Pacific Ltd.

French

Domaine(s)
  • Physique
  • Ingénierie
  • Exploitation (Transport par rail)
  • Entretien (Équipement ferroviaire)
DEF

Vitesse à laquelle la courbure et le dévers de la voie créent un équilibre parfait par rapport à l’accélération centrifuge.

OBS

vitesse d'équilibre : terme uniformisé par Canadien Pacifique Ltée.

Spanish

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Record 2 - external organization data 2005-08-05

English

Subject field(s)
  • Atomic Physics
  • Compartment - Canadian Nuclear Safety Commission
CONT

High-energy neutrons travel at speeds a few percent of the speed of light and are called fast neutrons. They slow by undergoing elastic and inelastic collisions with surrounding nuclei until they reach energy equilibrium with their surroundings.

Key term(s)
  • high energy neutron

French

Domaine(s)
  • Physique atomique
  • Tiroir - Commission canadienne de sûreté nucléaire
CONT

Ces neutrons à haute énergie se déplacent à une fraction de la vitesse de la lumière - ce sont les neutrons rapides. Ils sont ralentis par leurs collisions élastiques et inélastiques avec les noyaux voisins, jusqu'à ce qu'ils soient en équilibre thermique (énergétique) avec leur environnement.

Spanish

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Record 3 1996-10-11

English

Subject field(s)
  • Analytical Chemistry
CONT

Dynamic adsorption. The most common mode of adsorptive separation process employs a fixed bed, cyclic operation. As the wet process stream enters the fresh molecular-sieve bed, the water vapor is adsorbed in a finite length of bed called a mass-transfer zone(MTZ), the bed length through which the concentration of the adsorbate is reduced from essentially inlet to outlet conditions. As wet gas continues to flow, the bed may be divided into three distinct zones; the dynamic equilibrium zone with inlet gas, the MTZ, and the remaining active zone. In most molecular-adsorption systems, the MTZ becomes stabilized because of its favorable isotherm and moves at a constant speed. The bed is exhausted when the leading edge of the MTZ reaches the outlet end of the bed. High effective capacity results from high dynamic equilibrium capacity and a short MTZ.

French

Domaine(s)
  • Chimie analytique
CONT

L'adsorption d'un mélange gazeux peut être menée de deux façons différentes: en régime statique ou en régime dynamique. [...] Dans l'adsorption dynamique, on force le mélange gazeux à traverser un lit d'adsorbant.

Spanish

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Record 4 1996-05-28

English

Subject field(s)
  • Scientific Measurements and Analyses
DEF

A viscometer which consists of a spindle rotated in a container of a sample liquid. The principle involved is that the viscosity is directly proportional to the torque required to drive the spindle.

CONT

The principle of the rotation type viscosity measuring element or the rotational spindle type viscosity measuring element is that viscosity of a fluid is directly proportional to the torque produced by the resistance to shearing stress on a spindle rotating in a fluid.

CONT

In the torque viscometer, a sensor(spindle) is rotated at some speed through the same couple arrangement which allows the sensor to be displaced to an equilibrium position at which point the calibrated torque spring gives a reference to the viscosity of the fluid being measured. Different types of spindles and speeds may be used.

CONT

The rotating-vane-type viscosity measuring element depends upon the drag on a rotating member in contact with the material whose viscosity is to be measured. The vane or rotating element is driven by a synchronous electrical motor. The torque required to rotate the member of the vane is measured and is proportional to the viscosity in contact with the rotating element. The synchronous motor drives the cage at a constant speed. The upper spindle arm is coupled to the cage through a calibrated beryllium-copper spring. During measurement, the spring is wound up until its force exactly equals the viscous drag on the spindle; then the cage and spindle continue to operate at the same speed, but with a definite angular relationship to each other proportional to the torque on the spring.

French

Domaine(s)
  • Mesures et analyse (Sciences)
DEF

Viscosimètre dont le dispositif tournant est entraîné à vitesse constante par un moteur synchrone, et l'on mesure le couple nécessaire à cette rotation en reliant par un ressort le moteur et l'arbre sur lequel est monté le dispositif. La torsion du ressort, c'est-à-dire le déphasage (ou le décalage) entre le moteur et l'arbre est une mesure du couple, donc de la viscosité.

CONT

Le principe du viscosimètre rotatif ou du viscosimètre à corps tournant est qu'un objet qui tourne dans un liquide subit une force de ralentissement due à la viscosité du liquide. Il s'agit généralement d'un cylindre aux extrémités coniques, l'ensemble du dispositif ayant la forme d'un fuseau. On emploie aussi des disques et des roues à aubes.

Spanish

Save record 4

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