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Engineering ToolBox > Cavitations Number

An introduction to and a definition of the Cavitations Number

The Cavitations Number is a "special edition" of the dimensionless Euler Number.

• The Euler Number An introduction to and a definition of the Euler Number

The Cavitations Number is useful for analyzing fluid flow dynamics problems where cavitations may occur.

The Cavitations Number can be expressed as

Ca = ( p_r - p_v ) / 1/2 ρ v² (1)

where

Ca = Cavitations number

p_r = reference pressure (Pa)

p_v = vapor pressure of the fluid (Pa)

ρ = density of the fluid (kg/m³)

v = velocity of fluid (m/s)