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Fundamentals of Engineering Thermodynamics | 7th Edition | ISBN: 9780470495902 | Authors: Michael J. Moran, Howard N. Shapiro, Daisie D. Boettner, Margaret B. Bailey
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Using Specific Volume, Volume, and PressureWater flows

Chapter 1, Problem 36P

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QUESTION:

Water flows through a Venturi meter, as shown in Fig. P1.36. The pressure of the water in the pipe supports columns of water that differ in height by \(10 \mathrm{in}\). Determine the difference in pressure between points a and b, in \(\mathrm{lbf} / \mathrm{in}^2{ }^2\) Does the pressure increase or decrease in the direction of flow? The atmospheric pressure is \(14.7 \mathrm{lbf} / \mathrm{in}^2\), the specific volume of water is \(0.01604 \mathrm{ft}^3 / \mathrm{lb}\, and the acceleration of gravity is \(g=32.0 \mathrm{ft} / \mathrm{s}^2\.

                                                     

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QUESTION:

Water flows through a Venturi meter, as shown in Fig. P1.36. The pressure of the water in the pipe supports columns of water that differ in height by \(10 \mathrm{in}\). Determine the difference in pressure between points a and b, in \(\mathrm{lbf} / \mathrm{in}^2{ }^2\) Does the pressure increase or decrease in the direction of flow? The atmospheric pressure is \(14.7 \mathrm{lbf} / \mathrm{in}^2\), the specific volume of water is \(0.01604 \mathrm{ft}^3 / \mathrm{lb}\, and the acceleration of gravity is \(g=32.0 \mathrm{ft} / \mathrm{s}^2\.

                                                     

ANSWER:

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We have to calculate the pressure difference for the given height difference.

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