Nondimensional Number
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Nondimensional Number
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A pure number not involving any physical dimensions, e.g., a ratio of two
velocities or two lengths.
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Such numbers are fundamental descriptive quantities of a physical
system. Nondimensional numbers involving several variables often are
interpreted as estimates of characteristics velocity ratios, force ratios,
heat transfer ratios, frequency ratios, etc. Usually several different ratio
interpretations are possible and useful for the same number. (See Mach
number, Reynolds
number, Boussinesq
number, Cauchy
number, Prandtl
number, Peclet
number, Rayleigh
number, Strouhal
number, Richardson
number, Nusselt
number, Grashof
number, Taylor
number, Froude
number.)
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References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use
