CH E243 Chapter Notes - Chapter 5: Joule, Former State Routes In Pennsylvania, Mass Flow Rate
16 Nov 2016
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Document Summary
Conservation of mass relation for control volumes. Flow work and energy of fluid streams. Apply energy balance to systems that involve steady-flow processes. It turns out that mass m and energy e can be converted to each other according to the formula: E = mc2 where c is the speed of light in a vacuum this eq"n suggests there is equivalence b/w mass and energy. For closed systems, the conservation of mass principle is implicitly used by requiring the mass of the system remain constant during a process. For control volumes, mass can cross the boundaries, so we must keep track of the amount of mass entering and leaving the control volume. Mass flow rate: the amount of mass flowing through a cross section per unit time, A fluid flows into or out of a control volume through pipes or ducts. The mass flow rate through the entire cross-sectional area of a pipe or duct is obtained by integration:
