Eckert Number Calculator

Enter value, select unit and click on calculate. Result will be displayed.

Ec = Eckert Number      V = Velocity
cp = Specific Heat      △T = Temperature Difference

Velocity (V):
Specific Heat (cp)
Temperature Difference (△T):
Eckert Number (Ec):

The Eckert number (Ec) is a dimensionless number used in thermodynamics and heat transfer, particularly in situations involving high-speed fluid flow. It quantifies the relative importance of the kinetic energy to the enthalpy (thermal energy) of the flow.

The Eckert number is defined as:

Where:

  • = velocity of the fluid (m/s)
  • cp = specific heat capacity at constant pressure (J/kg·K)
  • = temperature of the fluid (K)
  • T∞ = reference temperature (often the temperature of the surrounding environment or the fluid far from the object) (K)

The Eckert number compares the kinetic energy of a fluid flow with the energy required to raise the fluid's temperature by a certain amount.