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Poise (absolute viscosity)
Oil glossary |
A measure of viscosity numerically equal to the force required to move a plane surface of one square centimeter per second when the surfaces are separated by a layer of fluid one centimeter in thickness. it is the ratio of the shearing stress to the shear rate of a fluid and is expressed in dyne seconds per square centimeter (dyne sec/cm2); 1 centipoise equals .01 poise.
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Numerically, английский
Centimeter, английский
- Сантиметр
- In the metric system, a measure of length equal to a hundredth part of a meter, or 0.3937+ in.; abbreviated cm; an inch equals 2.54 cm. central air-conditioning system an airconditioning system in which the air is treated by equipment at one or more central locations outside the spaces served, and conveyed to and from these spaces by means of fans and pumps through ducts and pipes. central air-handling unit an air-handling unit in which treated air is distributed to a number of spaces by means of ductwork.
Centipoise, английский
- The one-hundredth part of a poise, an ab¬solute unit of fluid viscosity. viscosity of drill-mud fluid is sometimes expressed in centipoise units. see poise.
- A unit of absolute viscosity; one centipoise equals 0.01 poise. at the same temperature, centipoises equals centistokes multiplied by specific gravity (cp = cst x sp. grav.).
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Polar compound, английский
A chemical compound whose molecules exhibit electrically positive characteristics at one extremity and negative characteristics at the other. polar compounds are used as additives in many petroleum products. polarity gives certain molecules a strong affinity for solid surfaces; as lubricant additives (oiliness agents), such molecules plate out to form a tenacious, friction-reducing film. some polar molecules are oil-soluble at one end and water-soluble at the other end; in lubricants, they act as emulsifiers, helping to form stable oil-water emulsions. such lubricants are said to have good metal-wetting properties. polar compounds with a strong attraction for solid contaminants act as detergents in engine oils by keeping contaminants finely dispersed.
Pneumatics, английский
- Engineering science pertaining to gaseous pressure and flow.
- Пневматика
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