Galilei number

From Wikipedia, the free encyclopedia

In fluid dynamics, the Galilei number (Ga), sometimes also referred to as Galileo number (see discussion), is a dimensionless number named after Italian scientist Galileo Galilei (1564-1642).

It may be regarded as proportional to gravity forces divided by viscous forces. The Galilei number is used in viscous flow and thermal expansion calculations, for example to describe fluid film flow over walls. These flows apply to condensors or chemical columns.

{\mathrm {Ga}}=Re^{2}Ri={\frac {g\,L^{3}}{\nu ^{2}}}
  • g: gravitational acceleration, (SI units: m/s2)
  • L: characteristic length, (SI units: m)
  • ν: characteristic kinematic viscosity, (SI units: m2/s)

See also

References

  • VDI-Wärmeatlas; 5., extended Edition; VDI Verlag Düsseldorf; 1988; page Bc 1 (German)
  • W. Wagner; Wärmeübertragung; 5., revised Edition; Vogel Fachbuch; 1998; page 119 (German)

External links

This article is issued from Wikipedia. The text is available under the Creative Commons Attribution/Share Alike; additional terms may apply for the media files.