# Eckert Number

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Eckert number, abbreviated as Ec, a dimensionless number, is used to calculate the ratio of the kinetic energy to enthalpy.

## Eckert Number formula

 $$\large{ Ec = \frac{U^2 } {2 \; c \; \Delta T} }$$

### Where:

$$\large{ Ec }$$ = Eckert number

$$\large{ \Delta T }$$ = change in temperature

$$\large{ U }$$ = characteristic flow velocity

$$\large{ c }$$ = specific heat

Tags: Equations for Energy