Lect16MassConsvDiv2&5SP2012

Lect16MassConsvDiv2&5SP2012 - ME 200:...

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ME 200: Thermodynamics I Lecture 16: Mass Conservation, Flow Energy
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This Lecture Conservation of Mass Flow Energy
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Mass Flow Rate Amount of mass flowing through a cross section per unit time (kg/s) For most cases of practical interest » One-dimensional flow i.e. properties vary in the bulk flow direction only » Velocity and density almost constant across the cross-section ˆ nn A A mV d AV V n  av m ρ VA
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Mass Flow Rate Figures from Cengel and Cimbala, Fluid Mechanics: Fundamentals and Applications
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Volume Flow Rate Amount of volume flowing through a cross section per unit time (m 3 /s) » Mass flow rate and volume flow rate related by specific volume. For uniform flow, perpendicular to control surface: n A Vd A  av VA V A   vv av Vr V V VA mV A  
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Laminar and Turbulent Pipe Flow Comparison of velocity profiles for (a) laminar and (b) turbulent pipe flow. The average velocity and the volumetric flow rate are the same for each profile.
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This note was uploaded on 02/22/2012 for the course ME 200 taught by Professor Gal during the Spring '08 term at Purdue University-West Lafayette.

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Lect16MassConsvDiv2&5SP2012 - ME 200:...

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