MECH 361 Lecture Notes - Lecture 3: Mass Flow Rate, Isentropic Process, Irreversible Process
2 May 2016
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Note that newton"s 2nd law is valid only for inertial frames of frames of reference i. e. non-accelerating frames or d. Vframe = 0 vframe = constant dt. The above requires the observer to be either at rest or moving with a constant velocity. Conservation of energy (or the 1st law of thermodynamics) o. V n da p where: e = u + V 2 + gz , u is the internal (or molecular) energy, and is the flow-work. p o is positive if heat is supplied to the system (heat into the system). W is positive if the system is doing work (work out of the system). Where s is the specific entropy and t is the absolute temperature at the boundary. $ n da ( = 0 where s 0 from conservation of mass. For a steady flow, all properties are not functions of time, or / t = = 0 .
