Lecture_21_notes - Chemical Engineering 374 Fluid Mechanics...

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1 1 Chemical Engineering 374 Fluid Mechanics Fall 2010 Flow Measurement Flow meters and velocity measurement Measure – Velocity (instantaneous) – Flow rate (~integral) Primitive to complex – Bucket and watch – Particle Image Velocimetry (laser sheet full planar velocity field. Many measurement types. – Operate on various physical principles 2
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2 Types – Bernoulli Effects – Drag Effects – Fluid Displacement – Heat Transfer – Vortex Shedding – Wave Disturbence – Magnetic Flow meters – Intertial Effects – Particle Imaging – Cumulative flow 3 Examples – Pitot tubes – Orifice meters – Nozzles – Venturi meters – Rotameters – Rotors/turbines/paddles – Hot wire/film aneometers – Vortex flowmeter – Laser Doppler velocimetry – Electromagnetic – Ultrasonic flowmeters – Bellows – Nutating disk Bernoulli Effects • Pitot probes – Gases and Liquids – Higher velocities needed for gases – Simple, inexpensive, reliable – Need good alignment 4
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This note was uploaded on 03/11/2012 for the course CHE 374 taught by Professor Davidlignell during the Fall '12 term at Brigham Young University, Hawaii.

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Lecture_21_notes - Chemical Engineering 374 Fluid Mechanics...

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