Eckert Number

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:

Units	English	SI
\(\large{ Ec }\) = Eckert number	\(\large{dimensionless}\)
\(\large{ U }\) = characteristic flow velocity	\(\large{\frac{ft}{sec}}\)	\(\large{\frac{m}{s}}\)
\(\large{ c }\) = specific heat	\(\large{\frac{Btu}{lbm-F}}\)	\(\large{\frac{J}{kg-K}}\)
\(\large{ \Delta T }\) = temperature change	\(\large{F}\)	\(\large{K}\)