Eckert number
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The Eckert number is a dimentionless number used in fluid dynamics. It expresses the relationship between a flow's kinetic energy and enthalpy, and is used to characterize dissipation. It is named after Ernst R. G. Eckert.
It is defined as
\[ \mathit{Ec}=\frac{V^2}{c_p\Delta T} = \frac{\mbox{Kinetic Energy}}{\mbox{Enthalpy}} \]
where
- \(V\) is a characteristic velocity of the flow.
- \(c_p\) is the constant-pressure specific heat of the flow.
- \(\Delta T\) is a characteristic temperature difference of the flow.
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