pipe Reynolds number

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• Reynolds number — n. 〚after O. Reynolds (1842 1912), Eng physicist〛 a dimensionless parameter used to determine the nature of fluid flow along surfaces and around objects, as in a wind tunnel * * * In fluid mechanics, a number that indicates whether the flow of a… …   Universalium

• Reynolds number — In fluid mechanics and heat transfer, the Reynolds number mathrm{Re} is a dimensionless number that gives a measure of the ratio of inertial forces ({old mathrm V} ho) to viscous forces (mu / L) and, consequently, it quantifies the relative… …   Wikipedia

• reynolds number — n. Physics a quantity indicating the degree of turbulence of flow past an obstacle etc. Etymology: O. Reynolds, Engl. physicist d. 1912 * * * ˈrenəldz noun Usage: usually capitalized R Etymology: after Osborne Reynolds died 1912 English physicist …   Useful english dictionary

• Reynolds number — noun a dimensionless parameter that determines the behavior of viscous flow patterns. In pipe flow a value less than about 2,000 (known as the critical Reynolds number) produces laminar flow, one above about 3,000 produces turbulent flow… …   Wiktionary

• Reynolds number — noun Etymology: Osborne Reynolds died 1912 English physicist Date: 1910 a number characteristic of the flow of a fluid in a pipe or past an obstruction …   New Collegiate Dictionary

• Pipe Networks — generally refers to a common problem in Hydraulic Design. In order to direct water to many individuals in a municipal water supply, many times the water is routed through a Water supply network. A major part of this network may consist of… …   Wikipedia

• Reynolds analogy — relates turbulent momentum and heat transfer. The main assumption is that heat flux q/A in a turbulent system is analogous to momentum flux τ, which suggests that the ratio τ/(q/A) must be constant for all radial positions.The complete Reynolds… …   Wikipedia

• Pipe flow — is subset of rheology.It can roughly be divided into two: *Laminar flow see Hagen Poiseuille flow *Turbulent flow see Moody diagramThe transition between the two is when the Reynolds number is approximately 2300.ee also*Rheology …   Wikipedia

• Dean number — The Dean number is a dimensionless group in fluid mechanics, which occurs in the study of flow in curved pipes and channels. It is named after the British scientist W. R. Dean, who studied such flows in the 1920s (Dean, 1927, 1928). Definition… …   Wikipedia

• Nusselt number — In heat transfer at a boundary (surface) within a fluid, the Nusselt number is the ratio of convective to conductive heat transfer across (normal to) the boundary. Named after Wilhelm Nusselt, it is a dimensionless number. The conductive… …   Wikipedia

• Womersley number — A Womersley number is a dimensionless number in biofluid mechanics. It is a dimensionless expression of the of pulsatile flow frequency in relation to viscous effects. It is named after John R. Womersley (1907 1958).The Womersley number, usually… …   Wikipedia