Grashof's number

Grashof's number
критерий Грасгофа

English-russian astronautics dictionary. - M.: Military Publishing house. . 1964.

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  • Grashof number — The Grashof number mathrm{Gr} is a dimensionless number in fluid dynamics and Heat Transfer which approximates the ratio of the buoyancy to viscous force acting on a fluid. It frequently arises in the study of situations involving natural… …   Wikipedia

  • Grashof number — Grashofo skaičius statusas T sritis Energetika apibrėžtis Skaičius, apibūdinantis skysčio tekėjimą dėl skirtingo tankio įvairiose jo vietose. Jis išreiškia keliamųjų ir inercinių jėgų santykį. atitikmenys: angl. Grashof number vok. Grazhof Zahl,… …   Aiškinamasis šiluminės ir branduolinės technikos terminų žodynas

  • Rayleigh number — In fluid mechanics, the Rayleigh number for a fluid is a dimensionless number associated with buoyancy driven flow (also known as free convection or natural convection). When the Rayleigh number is below the critical value for that fluid, heat… …   Wikipedia

  • Franz Grashof — (July 11, 1826 in Düsseldorf October 26, 1893 in Karlsruhe) was a German engineer. He was a professor of Applied Mechanics at the Technischen Hochschule Karlsruhe. He is one of the founding directors of Verein Deutscher Ingenieure (VDI) in 1855.… …   Wikipedia

  • Hagen number — The Hagen number is a dimensionless number used in forced flow calculations. It is the forced flow equivalent of the Grashof number.It is defined as:: mathit{Hg} = frac{1}{ ho}frac{mathrm{d} p}{ mathrm{d} x}frac{L^3}{ u^2}where:*frac{mathrm{d}… …   Wikipedia

  • nombre de Grashof — Grashofo skaičius statusas T sritis Energetika apibrėžtis Skaičius, apibūdinantis skysčio tekėjimą dėl skirtingo tankio įvairiose jo vietose. Jis išreiškia keliamųjų ir inercinių jėgų santykį. atitikmenys: angl. Grashof number vok. Grazhof Zahl,… …   Aiškinamasis šiluminės ir branduolinės technikos terminų žodynas

  • 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

  • Richardson number — The Richardson number is named after Lewis Fry Richardson (1881 ndash; 1953). It is the dimensionless number that expresses the ratio of potential to kinetic energy [Modellers will be more familiar with the reciprocal of the square root of the… …   Wikipedia

  • Magnetic Reynolds number — The Magnetic Reynolds number is a dimensionless group that occurs in magnetohydrodynamics. It gives an estimate of the effects of magnetic advection to magnetic diffusion, and is typically defined by: where U is a typical velocity scale of the… …   Wikipedia

  • Morton number — For Morton number in number theory, see Morton number (number theory). In fluid dynamics, the Morton number (Mo) is a dimensionless number used together with the Eötvös number to characterize the shape of bubbles or drops moving in a surrounding… …   Wikipedia

  • Prandtl number — The Prandtl number mathrm{Pr} is a dimensionless number approximating the ratio of momentum diffusivity (kinematic viscosity) and thermal diffusivity. It is named after the German physicist Ludwig Prandtl.It is defined as::mathrm{Pr} = frac{… …   Wikipedia


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