# Eckert Number

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Eckert Number is a dimensionless number used to calculate the ratio of the kinetic energy to enthalpy.

## FORMULA

$$Ec = \frac{v^2 } {2 v \triangle T}$$

Where:

$$Ec$$ = Eckert Number

$$v$$ = flow velocity

$$c$$ = specific heat

$$\triangle T$$ = temperature differential

Solve for:

$$v = \sqrt { 2 Ec c \triangle T }$$

$$c = \frac{v^2 } {2 Ec \triangle T}$$

$$\triangle T = \frac{v^2 } {2 Ec c}$$