# Cauchy Number

Cauchy number, abbreviated as Ca, a dimensionless number expressing the ratio of inertial force to compressibility force in a flow. When the compressibility is important the elastic forces must be considered along with inertial forces.

## Cauchy Number CALCULATOR

## Formulas that use Cauchy Number

\(\large{ Ca = \frac {v^2 \; \rho } { B } }\) | |

\(\large{ Ca = \frac {v^2 \; \rho } { B } }\) |

### Where:

\(\large{ Ca }\) = Cauchy number

\(\large{ B }\) = bulk modulus elasticity

\(\large{ \rho }\) (Greek symbol rho) = density

\(\large{ v }\) = velocity of flow