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Ec = Eckert Number V = Velocity
cp = Specific Heat △T = Temperature Difference
Eckert numbers are a dimensionless number group. The Eckert number (Ec) is a dimensionless number used in continuum mechanics. It represents the relationship between flow kinetic energy and boundary layer enthalpy difference and is used to characterize heat dissipation. It is named after Ernst R. G. Eckert.