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Galilei number

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Title: Galilei number  
Author: World Heritage Encyclopedia
Language: English
Subject: Dimensionless quantity, Reynolds number, Shields parameter, Atwood number, Brinkman number
Collection: Dimensionless Numbers of Fluid Mechanics, Fluid Dynamics, Galileo Galilei
Publisher: World Heritage Encyclopedia

Galilei number

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^2Ri= \frac{g\, L^3}{\nu^2}

See also


  • 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

  • Website referring to the Galileo number with calculator
  • Table of dimensionless numbers (German)
  • Table of dimensionless numbers (German)
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