Cavitation number

The cavitation number (symbol: ) is a dimensionless measure of the similarity theory and is used to describe fluids used in fluid mechanics. It is similar to the Euler number. The cavitation number is a measure of when the fluid is cavitating. The definition of the cavitation is

With

• The density of the undisturbed fluid
• The pressure in the undisturbed flow
• The vapor pressure of the fluid and
• The flow velocity.

The denominator represents the dynamic pressure of the flow is (see Bernoulli's equation ), and therefore contains the factor. The numerator is the pressure difference that exists virtually or as security to cavitation.

When the pressure of fluid decreases so far that it is less than or equal to the vapor pressure of the fluid, the fluid is in the gas phase - it is cavitating. In so theoretically occurs at cavitation. In real fluids and other foreign particles not taken into account in the idealization properties can cause the cavitation than moved to a different pressure.

Swell

• Code ( Fluid Mechanics )