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Characteristic number (fluid dynamics)

  1. Fluid dynamics stubs
  2. Dimensionless numbers
  3. Fluid dynamics


Characteristic numbers are dimensionless numbers used in fluid dynamics to describe a character of the flow. To compare a real situation (e.g. an aircraft) with a small-scale model it is necessary to keep the important characteristic numbers the same. Names of these numbers were standardized in ISO 31, part 12.


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Dimensionless numbers in fluid dynamics
  • Archimedes
  • Atwood
  • Bagnold
  • Bejan
  • Biot
  • Bond
  • Brinkman
  • Capillary
  • Cauchy
  • Damköhler
  • Dean
  • Deborah
  • Eckert
  • Ekman
  • Eötvös
  • Euler
  • Froude
  • Galilei
  • Graetz
  • Grashof
  • ‎Görtler
  • Hagen
  • Keulegan–Carpenter
  • Knudsen
  • Laplace
  • Lewis
  • Mach
  • Marangoni
  • Morton
  • Nusselt
  • Ohnesorge
  • Péclet
  • Prandtl (magnetic
  • turbulent)
  • Rayleigh
  • Reynolds (magnetic)
  • Richardson
  • Roshko
  • Rossby
  • Rouse
  • Ruark
  • Schmidt
  • Sherwood
  • Shields
  • Stanton
  • Stokes
  • Strouhal
  • Stuart
  • Suratman
  • Taylor
  • Ursell
  • Weber
  • Weissenberg
  • Womersley
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