dimensionless number

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dimensionless number

[də′men·chən·ləs ′nəm·bər]
(mathematics)
A ratio of various physical properties (such as density or heat capacity) and conditions (such as flow rate or weight) of such nature that the resulting number has no defining units of weight, rate, and so on. Also known as nondimensional parameter.
References in periodicals archive ?
A systematic evaluation of the dimensionless refrigerant properties revealed that the relative capacity index for a specified temperature lift correlates well with the dimensionless quantity [DELTA][h.
The linear correlation coefficient is a dimensionless quantity.
In addition to dimensionless quantity [theta], for further analysis the dimensionless variables are introduced: