Knudsen number

Knudsen number
Knudsenova značajka

English-Croatian chemistry dictionary. 2013.

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  • Knudsen number — The Knudsen number (Kn) is a dimensionless number defined as the ratio of the molecular mean free path length to a representative physical length scale. This length scale could be, for example, the radius of a body in a fluid. The number is named …   Wikipedia

  • Knudsen — is a surname of Scandinavian origin, derived from the personal name Knud (Canute).Knudsen refers to:*Persons **Gunnar Knudsen (1848 ndash;1928), Prime Minister of Norway 1908 ndash;1910 and 1913 ndash;1920 **Jens Martin Knudsen (1930 ndash;2005) …   Wikipedia

  • Knudsen flow — describes the movement of fluids with a high Knudsen number, that is, where the characteristic dimension of the flow space is of the same or smaller order of magnitude as the mean free path. Separation processes using Knudsen Flow For a gas… …   Wikipedia

  • Knudsen diffusion — is a means of diffusion that occurs in a long pore with a narrow diameter (2–50nm) because molecules frequently collide with the pore wall. [cite web |url=http://www.mse.ufl.edu/ ssinn/Backgrounds/theo02 diff.html |title=Transport in Small Pores… …   Wikipedia

  • Martin Knudsen — This article is about the Danish physicist Martin Knudsen. For the Norwegian footballer, see Martin Knudsen (footballer) . Martin Knudsen, 1934 at London Martin Hans Christian Knudsen (February 15, 1871 in Hasmark – May 27, 1949 in Copenhagen)… …   Wikipedia

  • Lars Knudsen — Lars Ramkilde Knudsen (born February 21, 1962) is a Danish researcher in cryptography, particularly interested in the design and analysis of block ciphers, hash functions and message authentication codes (MACs). AcademicAfter some early work in… …   Wikipedia

  • Gunnar Knudsen — (born Aanon Gunerius Knudsen on 19 September 1848, Saltrød 1 December 1928, Skien) was a Norwegian politician from the Liberal Party.He was Prime Minister of Norway from 1908 to 1910 and from 1913 to 1920, for a total of 9 years, 3 months and 4… …   Wikipedia

  • Michael V. Knudsen — Medal record Michael V. Knudsen Competitor for  Denmark …   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

  • 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

  • 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

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