Glossary of Thermodynamic Terms

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U
Primary Word
Secondary Word
Definition
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uniform flow Properties of the flowing fluid are the same at all positions over the cross-sectional area of flow and they do not vary with time. 5D1 - 4, 5E1 , 4, 
uniform state At any particular instant, properties of the system are the same as the properties of the outlet stream because the system is well-mixed. 5D1, 5E1 , 5, 
unit conversions 1B3 , 6 - 8
units 1B2
universal gas constant The constant of proportionality in the ideal gas equation of state denoted by the symbol R [ kJ/kmol-K, kPa-m3 / kmol-K ]. 2E2
unsteady-state 5D1