Thermofluids 0.0 / 5 ? Civil EngineeringTools of the TradeUniversityOther Created by: MaxterCreated on: 15-03-16 21:31 Conservation of Mass For any system closed to all transfers of mass and energy, the mass of the system must remain constant over time, dm/dt = 0 1 of 8 Conservation of Momentum The momentum of a system is constant if there are no eternal forces acting on it, F = ma 2 of 8 Conservation of Energy Energy can neither be created of transferred but transformed from one form to another, Q -W = DEt/Dt 3 of 8 System A continuous mass of fluid that always contains the same mass but whose shape/volume may change 4 of 8 Environment The area outside the system boundary 5 of 8 Control Volume Do not deform with the flow and mass, momentum and energy are allowed to cross the control volume boundary 6 of 8 Open Process Flow through a control volume process 7 of 8 Reynolds Number Re Inertial force/viscous force 8 of 8
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