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HORIZONTAL AIR FLOW [21 records]

Record 1 2026-01-08

English

Subject field(s)
  • Meteorology
DEF

A katabatic wind, it is formed at night by the radiational cooling along mountainsides.

CONT

... at night the air in contact with the mountain is cooler than farther from the land mass and so the cooler air sinks along the slope producing the mountain breeze.

CONT

mountain breeze ... As the slopes become colder than the surrounding atmosphere, the lower levels of air cool and drain to the lowest point of the terrain. It may reach several hundred feet in depth, and extreme cases, attain speeds of 50 knots or greater. It blows in the opposite direction of a valley breeze.

CONT

During the night, the air along the mountain slopes begins to cool quickly because of longwave radiation loss... As the air cools, it becomes more dense and begins to flow downslope causing a mountain breeze. Convergence of the draining air occurs at the valley floor and forces the air to move vertically upward. The upward movement is usually limited by the presence of a temperature inversion which forces the air to begin moving horizontally. This horizontal movement completes the circulation cell system. In narrowing terrain, mountain winds can accelerate in speed because of the venturi effect. Such winds can attain speeds as high has 150 kilometers per hour.

French

Domaine(s)
  • Météorologie
DEF

Vent catabatique soufflant la nuit et aux premières heures après le lever du Soleil, le long des pentes, des montagnes vers les vallées ou les plaines.

CONT

Brise de pente [...] De nuit [...] l'air se refroidit au contact du sol et a tendance à descendre le long des pentes vers le fond de la vallée où s'instaure un courant général vers le bas de la vallée, c'est la brise d'amont.

Spanish

Campo(s) temático(s)
  • Meteorología
DEF

Corriente de aire que desciende a lo largo de una ladera o cauce por efecto de la gravedad, cuando su densidad es mayor que la de las capas de aire contiguas situadas al mismo nivel.

Save record 1

Record 2 2015-03-12

English

Subject field(s)
  • Meteorology
DEF

Horizontal wind shear which tends to produce anticyclonic rotation of the individual air particles along the line of flow. In the Northern Hemisphere anticyclonic shear is present if the wind speed decreases from left to right across the direction of flow; the opposite is true in the Southern Hemisphere.

French

Domaine(s)
  • Météorologie
DEF

Cisaillement horizontal du vent qui tend à produire une rotation anticyclonique des particules d'air le long des lignes de flux. On observe un cisaillement anticyclonique dans l'hémisphère Nord lorsque la vitesse du vent diminue de gauche à droite dans la direction du courant; le contraire est vrai pour l'hémisphère Sud.

Spanish

Campo(s) temático(s)
  • Meteorología
DEF

Cortante horizontal del aire que tiende a producir una rotación anticiclónica de las partículas de aire a lo largo de la línea de flujo. Se observa una cortante anticiclónica en el hemisferio Norte cuando la velocidad del viento disminuye de izquierda a derecha en la dirección de la corriente; en el hemisferio Sur sucede lo contrario.

Save record 2

Record 3 2013-09-19

English

Subject field(s)
  • Air Conditioning and Heating
CONT

The primary function of an air handling system for any type of clean room is to control the level of airborne contaminant particles by constantly filtering and recirculating the air. The arrangement of a system depends on whether it is to be a conventional clean room, unidirectional vertical or horizontal flow clean room. In the basic form, however, it consists of a fan, ducting for inlet and exhaust air and an air filtration system.

CONT

Because the façades are not airtight, building occupants often block up the fresh-air ducts, thereby interfering with the air circulation system.

Key term(s)
  • air flow system

French

Domaine(s)
  • Conditionnement de l'air et chauffage

Spanish

Save record 3

Record 4 2011-08-15

English

Subject field(s)
  • HVAC Distribution Systems

French

Domaine(s)
  • Distribution et évacuation (chauffage et conditionnement d'air)

Spanish

Save record 4

Record 5 2010-06-08

English

Subject field(s)
  • Respiratory System
DEF

Diagram where air flow is represented on the vertical axis and lung volume on the horizontal axis.

OBS

The flow-volume loop: Normal standards and abnormalities in chronic obstructive pulmonary disease.

French

Domaine(s)
  • Appareil respiratoire
CONT

Évaluation des lésions obstructives de la trachée et du larynx par les boucles débit-volume de capacité vitale forcée [...] : Les lésions localisées avec un rétrécissement fixe entraînent une diminution égale des boucles inspiratoires et expiratoires.

Spanish

Save record 5

Record 6 2009-02-17

English

Subject field(s)
  • Climatology
DEF

The depletion of air in a layer or region of the atmosphere due to outflowing winds.

CONT

Simply stated, convergence is defined as the increase of mass within a given layer of the atmosphere, while divergence is the decrease of mass within a given layer of the atmosphere.... Divergence. Winds in this situation produce a net flow of air outward from the layer. We associate this type of divergence with high-pressure cells, where the flow of air is directed outward from the center, causing a downward motion. Divergence, too, is classified as either horizontal or vertical.

French

Domaine(s)
  • Climatologie
DEF

Écoulement net de l'air vers l'extérieur, par suite de son éloignement, à l'horizontale, par rapport à une région donnée.

CONT

La divergence des lignes de flux dans le sens horizontal. Au sol, ce processus détermine la subsidence des masses d'air supérieures.

OBS

La divergence dans les basses couches entraîne la convergence en altitude. Quand la divergence s'opère en altitude, il y a ascendance au-dessous.

Spanish

Campo(s) temático(s)
  • Climatología
Save record 6

Record 7 2008-01-28

English

Subject field(s)
  • Office Equipment and Supplies
  • Electrical Appliances and Equipment
CONT

... RACE, an innovative, chic, and highly flexible method of organizing individual work areas [designed by Montréal designer David Ball]. RACE consists of components that are designed to be easily adjustable. Space dividers, desktops and filing space are all supported by a horizontal beam with a so-called raceway, a hollow core containing electrical wiring and data communications cables. The beam rests on metal posts at desk-top level, providing easy access to electrical outlets and allowing air to flow freely around and under the work area. Padded acoustic panels can be snapped onto vertical bars that rise above the desktop, providing privacy. Unlike similar systems, each piece can be moved separately and the raceway, for which the design is named, is flexible enough to accommodate rapidly changing communications systems. First developed in 1978, RACE has been fine-tuned over the years.... Its manufacturer and distributor, Haworth Inc. of Holland, Mich., acquired the manufacturing rights to RACE in 1990....

French

Domaine(s)
  • Équipement et fournitures de bureau
  • Appareillage électrique

Spanish

Save record 7

Record 8 2004-09-10

English

Subject field(s)
  • Fluid Mechanics and Hydraulics (Physics)
  • Wastewater Treatment
DEF

For a particle falling in a nonturbulent fluid (liquid or gas), the maximum possible velocity reached when the drag, or frictional resistance, on the particle equals the gravitational force on the particle.

CONT

terminal settling velocity.... The measure is used in the design of chambers in which particles are removed from air or from water by gravitational settling. The horizontal flow rate through the chamber must allow time for the particles to reach the bottom of the Settling Chamber.

OBS

settling chamber [(or settling tank)] (Water Quality) An enclosed container into which wastewater contaminated with solid materials is placed and allowed to stand. The solid pollutants suspended in the water sink to the bottom of the container for removal.

OBS

settlement rates: The rate of downward movement of particles through water. ... The settling velocity of a particle is often the same as the Terminal Settling Velocity.

French

Domaine(s)
  • Mécanique des fluides et hydraulique (Physique)
  • Traitement des eaux usées
CONT

Comment trouve-t-on la vitesse limite de sédimentation d'une bille sphérique qui descend dans un liquide réel?

Spanish

Save record 8

Record 9 2000-01-19

English

Subject field(s)
  • Textile Industries
  • Tools and Equipment (Textile Industries)
  • Engineering Tests and Reliability
CONT

Facilities Textiles Laboratories. Textile laboratories ... include basic chemical laboratory with equipment for fiber identification tests, and all types of instruments for fiber, yarn, and fabric’s physical and mechanical testing which are housed in a temperature and humidity controlled room. Equipment: Wrinkle Tester; Accelerotor; Air Flow Tester; Analytical Balance ... .

CONT

Air Flow Tester :Horizontal and Vertical.

French

Domaine(s)
  • Industries du textile
  • Outillage et équipement (Industries du textile)
  • Fiabilité, contrôle et essais (Ingénierie)

Spanish

Save record 9

Record 10 1999-10-09

English

Subject field(s)
  • Aeronautical Engineering and Maintenance
DEF

A device used in thermal spraying which directs the air pattern for purposes of atomization.

CONT

... a spray gun includes a fluid adjustment which controls the fluid valve, a spreader adjustment valve, an air-valve assembly, an air cap, a fluid inlet, and an air inlet. The balance among air pressure, airflow, fluid pressure, and fluid flow is controlled by adjusting the valves concerned to provide the desired spray quality and pattern. Air flowing through the center area of the air cap and through holes near the center mixes with fluid from the fluid tip and produces an atomized spray. Air flowing from the openings in the horns of the air cap impinges on each side of the fluid spray to produce an elongated spray pattern. This pattern may be adjusted for a wide or narrow area by changing the setting of the spreader adjustment valve. The pattern can be made vertical or horizontal by turning the air cap.

French

Domaine(s)
  • Aérotechnique et maintenance
CONT

Une soupape à ressort, actionnée par appui sur la détente du pistolet [pulvérisateur], commande le débit. A partir de la source d'air comprimé, l'air entre dans le pistolet par l'orifice d'admission d'air situé au bas de la poignée du pistolet. Il traverse le corps du pistolet et est projeté dans les petits trous d'une bague déflectrice placée à l'arrière de la tête qui entoure la buse de pulvérisation. L'alimentation en air se règle par une autre soupape à ressort, située également au-dessous de la détente. ... [Une soupape, montée à l'arrière du corps du pistolet,] modifie le réglage d'une ouverture à l'intérieur du pistolet, qui règle le débit d'air traversant une seconde série de trous de l'anneau déflecteur et se dirigeant vers des orifices situés dans les deux "bossages" de la tête. Ces bossages envoient des jets d'air convergents dans le courant pulvérisé.

OBS

anneau déflecteur : terme accepté par le Comité d'étude de la terminologie des cartes de travail du DC-9.

Spanish

Save record 10

Record 11 1993-03-26

English

Subject field(s)
  • Food Industries
CONT

Better air distribution makes the Stein Vertical Flow Oven much more effective than horizontal air flow ovens. Directed through slots, air in the VFO cooks product evenly on top and bottom.

OBS

In the food processing industry.

French

Domaine(s)
  • Industrie de l'alimentation

Spanish

Save record 11

Record 12 1990-01-30

English

Subject field(s)
  • Ovens, Furnaces and Boilers (Heating)
CONT

For area heating, horizontal-blow unit heaters in exterior zones should be located so as to blow either along the exposure or toward it at a slight angle. Where possible, multiple units should be arranged so that the discharge airstreams support each other and create a general circulatory motion in the space... Horizontal unit heaters should have discharge outlets located well above head level, and both horizontal and vertical units should be so applied that the heated airstream will be delivered to the occupied zone at temperatures and velocities which are not objectionable. where possible, units should be located so that the discharge air flow is into open spaces, such as aisles, and not directly on the occupants.

French

Domaine(s)
  • Fours et chaudières (Chauffage)
CONT

Actuellement on fabrique surtout des aérothermes à soufflage horizontal; l'axe du jet d'air est situé à 3 ou 4 m de hauteur et sa portée peut atteindre 60 m avec des vitesses de soufflage de l'ordre de 15 m/s. L'utilisation des aérothermes avec de telles portées du jet d'air nécessite que ce jet ne rencontre aucun obstacle sur lequel il soit susceptible de se réfléchir, ce qui implique des locaux bien dégagés et hauts de plafond. Moyennant cette condition, on peut obtenir un chauffage régulier d'un local au moyen d'aérothermes en très petit nombre : les aérothermes à soufflage horizontal peuvent très bien avoir des puissances de plusieurs centaines de milliers de kilocalories. C'est un mode de chauffage convenant bien à des ateliers, garages, halls industriels suffisamment dégagés.

Spanish

Save record 12

Record 13 1990-01-08

English

Subject field(s)
  • Ovens, Furnaces and Boilers (Heating)
DEF

Furnace in which the circulating air flows upward, discharging at or near the top of the casing.

CONT

The upflow or high-boy furnace has the blower beneath the heat exchanger discharging vertically upward. Air enters through the bottom or the side of the blower compartment and leaves at the top. Such furnaces may be used in closets and utility rooms on the first floor of homes or in basements with the return air ducted down to the blower compartment entrance.

OBS

Furnaces for forced air systems are available in various designs.... In addition, each is usually classified in terms of the direction in which the air is delivered. The three basic types are upflow, counter flow and horizontal, and there are several variations depending on the actual installation.

Key term(s)
  • up flow furnace
  • up flow forced warm air furnace
  • up draft furnace

French

Domaine(s)
  • Fours et chaudières (Chauffage)
CONT

Les modèles proposés, pour les plus nombreux, sont verticaux (...) Les figures 9A et 9B montrent respectivement un générateur vertical et un horizontal.

OBS

Il existe trois modèles principaux d'appareil de chauffage électrique à air pulsé pour les différents types de construction. Le système à circulation ascendante est semblable aux appareils de chauffage classique au mazout ou au gaz, l'air chaud étant distribué depuis le dessus de l'appareil dans les conduits de distribution, et le retour de l'air de la maison se faisant à l'arrière ou sur le dessus de l'appareil. C'est celui qui convient le mieux pour les sous-sols.

Spanish

Save record 13

Record 14 1990-01-08

English

Subject field(s)
  • Ovens, Furnaces and Boilers (Heating)
CONT

Oil furnaces. Indoor oil furnaces... are available in upflow, downflow, horizontal and low-boy configurations for ducted systems. They are also available as floor furnaces, wall furnaces, and free standing space heaters. Oil-fired outdoor furnaces and combination units are rare.... The ducted system, oil-fired, forced air furnaces are usually equipped with pressure-atomizing burners. The pump pressure and the orifice size of the injection nozzle regulate the firing rate of the furnace. Electric ignition is used to ignite the burners.... The combustion chamber and heat exchanger of oil-fired furnaces are normally formed as a common single chamber. It is formed from heavy gage steel into a welded assembly. The hot flue products flow through the inside of the heat exchanger into the chimney. The conditioned air flows over the outside of the heat exchanger and into the air supply plenum.

French

Domaine(s)
  • Fours et chaudières (Chauffage)
CONT

Maison de fin de semaine (...) On peut prévoir aussi le chauffage par air chaud avec générateur à mazout ou à gaz et distributions par gaines.

OBS

Fournaise : Ce terme est considéré comme impropre par les puristes. Selon Dagenais, dans son "Dictionnaire des difficultés de la langue française au Canada", "fournaise" serait un calque de l'anglais "furnace" et nous devrions plutôt dire "chaudière" lorsque le fluide caloporteur est l'eau ou la vapeur et "générateur d'air chaud", lorsque le fluide, est l'air. Cependant, ce terme reste d'usage fréquent au Québec, autant en langue parlée qu'en langue écrite.

Spanish

Save record 14

Record 15 1990-01-08

English

Subject field(s)
  • Ovens, Furnaces and Boilers (Heating)
DEF

Furnace through which the circulating air flows in the opposite direction to the flue gases.

CONT

Basically, there are three types of gas furnaces. They are : the upflow; the counterflow; and the horizontal furnace. The direction of air flow through the furnace is the determining factor for its name.

French

Domaine(s)
  • Fours et chaudières (Chauffage)
OBS

Le rendement des appareils [de chauffage à air chaud] ne semble pas affecté par la forme lamellaire ou tubulaire des échangeurs, mais les échangeurs à contre-courant, comme il est normal, conduisent à un meilleur rendement de la surface d'échange que les échangeurs à courants parallèles ou croisés.

Spanish

Save record 15

Record 16 1990-01-08

English

Subject field(s)
  • Ovens, Furnaces and Boilers (Heating)
DEF

Furnace in which the circulating air flows horizontally with the air inlet and discharge openings at opposite ends of the casing.

CONT

The horizontal furnace has the blower located beside the heat exchanger with the air entering one end, traveling horizontally through the blower and over the heat exchanger and discharging out the opposite end. Such furnaces are used for locations with limited head room, such as attics or crawl spaces below floors or suspended under the ceiling. These units are often designed so that the components may be rearranged to allow installation with air flow from left to right or from right to left.

French

Domaine(s)
  • Fours et chaudières (Chauffage)
CONT

Les modèles proposés [de générateurs d'air pulsé], pour les plus nombreux, sont verticaux; il existe cependant des appareils horizontaux qui peuvent trouver place dans des locaux bas, par exemple dans des combles; en atelier, ils peuvent aussi être suspendus par des tirants.

OBS

Il existe trois modèles principaux d'appareil de chauffage électrique à air pulsé pour les différents types de construction. Le système à circulation ascendante (...) Le système à circulation horizontale reçoit le retour d'air à une extrémité et évacue la chaleur à l'autre. Ce système convient parfaitement aux vides sanitaires. Le système à circulation descendante (...)

Spanish

Save record 16

Record 17 1990-01-08

English

Subject field(s)
  • Ovens, Furnaces and Boilers (Heating)
CONT

The upflow or high-boy furnace has the blower beneath the heat exchanger discharging vertically upward. Air enters through the bottom or the side of the blower compartment and leaves at the top. Such furnaces may be used in closets and utility rooms on the first floor of homes or in basements with the return air ducted down to the blower compartment entrance.

CONT

The three basic types [of forced air furnace] are upflow, counter flow and horizontal, and there are several variations depending on the actual installation.... The highboy(upflow) furnace is used primarily in single-level homes when the ducts are placed in the attic. This may be because of the slab on grade construction or because there is limited crawl space. The furnace may be located in a closet or recessed area in the wall. The air enters the furnace through a low side entry or through the bottom, and it leaves through the top.

OBS

Among the principal types [of forced-air furnaces] used for residences and small buildings the following arrangements are common: ... High-boy arrangement with up-flow of air, in which the blower is located at the bottom of the casing and the heat exchanger is located at the top.... High-boy arrangement with down-flow of air, in which the blower is located at the top of the casing and the heat exchanger is located below the blower.

French

Domaine(s)
  • Fours et chaudières (Chauffage)

Spanish

Save record 17

Record 18 1985-10-24

English

Subject field(s)
  • Electric Heating
  • HVAC Distribution Systems
CONT

To accommodate different house styles, there are three forced air electric furnace designs. The upflow system... Horizontal flow system... Downflow systems take return air through the top of the cabinet and discharge warm air from the bottom. This is the type of system usually installed on the main floor of houses on concrete slabs or in mobile homes.

Key term(s)
  • downflow electric furnace

French

Domaine(s)
  • Chauffage électrique
  • Distribution et évacuation (chauffage et conditionnement d'air)

Spanish

Save record 18

Record 19 1985-10-24

English

Subject field(s)
  • Electric Heating
  • HVAC Distribution Systems
CONT

To accommodate different house styles, there are three forced air electric furnace designs. The upflow system... Horizontal flow systems take return air in at one end and discharge warm air through the other. This system is good for crawl space installations. Downflow systems...

Key term(s)
  • horizontal flow electric furnace

French

Domaine(s)
  • Chauffage électrique
  • Distribution et évacuation (chauffage et conditionnement d'air)

Spanish

Save record 19

Record 20 1985-10-24

English

Subject field(s)
  • Electric Heating
  • HVAC Distribution Systems
CONT

To accommodate different house styles, there are three forced air electric furnace designs. The upflow system is similar to conventional oil or gas furnaces, discharging warm air from the top of the cabinet into the distribution ducts and taking house air in from the back or top of the cabinet. It is best located in the basement. Horizontal flow systems... Downflow systems...

Key term(s)
  • upflow electric furnace

French

Domaine(s)
  • Chauffage électrique
  • Distribution et évacuation (chauffage et conditionnement d'air)

Spanish

Save record 20

Record 21 1981-01-26

English

Subject field(s)
  • Fluid Mechanics and Hydraulics (Physics)
  • Water Treatment (Water Supply)
  • Wastewater Treatment
CONT

During the air scour, about two-thirds of the air flow passes through the hole and the rest through the slot, thus constituting a kind of weir which geometrically determines the depth of the air cushion. Should the floor not be perfectly horizontal, the divergence of air flow between two nozzles is slight because of the preponderant share of the flow passing through the hole.

Key term(s)
  • air flow divergence

French

Domaine(s)
  • Mécanique des fluides et hydraulique (Physique)
  • Traitement des eaux
  • Traitement des eaux usées
CONT

Lors du lavage à l'air, environ les deux tiers du débit d'air passent par le trou et le reste par la fente qui constitue une espèce de déversoir fixant géométriquement la profondeur du matelas d'air. En cas de défaut d'horizontalité du plancher, l'écart de débit d'air entre deux buselures est faible du fait de la part prépondérante du débit s'écoulant par le trou.

Spanish

Save record 21

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