friction of viscous lubrication

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• Friction — For other uses, see Friction (disambiguation). Classical mechanics …   Wikipedia

• Lubrication — is the process, or technique employed to reduce wear of one or both surfaces in close proximity, and moving relative to each another, by interposing a substance called lubricant between the surfaces to carry or to help carry the load (pressure… …   Wikipedia

• lubrication — See lubricate. * * * Introduction of any of various substances between sliding surfaces to reduce wear and friction. Lubricants may secondarily control corrosion, regulate temperature, electrically insulate, remove contaminants, or damp shock.… …   Universalium

• Hydrodynamic lubrication — Hydrodynamic (HD) lubrication (or fluid film lubrication) has essential elements:#A lubricant, which must be a viscous fluid. #Hydrodynamic flow behavior of fluid between bearing and journal. #The surfaces between which the fluid films move must… …   Wikipedia

• Dimensionless quantity — In dimensional analysis, a dimensionless quantity or quantity of dimension one is a quantity without an associated physical dimension. It is thus a pure number, and as such always has a dimension of 1.[1] Dimensionless quantities are widely used… …   Wikipedia

• damping — damp·ing (dămʹpĭng) n. The capacity built into a mechanical or electrical device to prevent excessive correction and the resulting instability or oscillatory conditions. * * * In physics, the restraint of vibratory motion, such as mechanical… …   Universalium

• Oil additive — Oil additives are chemical compounds that improve the lubricant performance of base oil (or oil base stock ). By utilizing the same base stock, many different oils can be manufactured, each with its distinctive properties. Additives comprise up… …   Wikipedia

• Fluid dynamics — Continuum mechanics …   Wikipedia

• viscosity — /vi skos i tee/, n., pl. viscosities. 1. the state or quality of being viscous. 2. Physics. a. the property of a fluid that resists the force tending to cause the fluid to flow. b. the measure of the extent to which a fluid possesses this… …   Universalium

• Progressive cavity pump — A progressive cavity pump is also known as a progressing cavity pump, eccentric screw pump or even just cavity pump and, as is common in engineering generally, these pumps can often be referred to by using a genericized trademark. Hence names can …   Wikipedia

• petroleum refining — Introduction  conversion of crude oil into useful products. History Distillation of kerosene and naphtha       The refining of crude petroleum owes its origin to the successful drilling of the first oil well in Titusville, Pa., in 1859. Prior to… …   Universalium