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Template:Unreferenced stub The Eckert number (Ec) is a dimensionless 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

\mathrm {Ec} ={\frac {V^{2}}{c_{p}\Delta T}}={\frac {\mbox{Kinetic Energy}}{\mbox{Enthalpy}}}

where

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+{{Unreferenced stub|auto=yes|date=December 2009}}
+The '''Eckert number''' ('''Ec''') is a [[Dimensionless quantity|dimensionless 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
+:<math>
+\mathrm{Ec} = \frac{V^2}{c_p\Delta T} = \frac{\mbox{Kinetic Energy}}{\mbox{Enthalpy}}
+</math>
+where
+* ''V'' is a characteristic velocity of the flow.
+* ''c<sub>p</sub>'' is the constant-pressure [[specific heat]] of the flow.
+* ∆''T'' is a characteristic temperature difference of the flow.
+{{NonDimFluMech}}
+{{DEFAULTSORT:Eckert Number}}
+[[Category:Dimensionless numbers of fluid mechanics]]
+[[Category:Dimensionless numbers of thermodynamics]]
+[[Category:Fluid dynamics]]
+{{Fluiddynamics-stub}}