Thinking Like an Engineer: An Active Learning Approach (4th Edition)
Thinking Like an Engineer: An Active Learning Approach (4th Edition)
4th Edition
ISBN: 9780134639673
Author: Elizabeth A. Stephan, David R. Bowman, William J. Park, Benjamin L. Sill, Matthew W. Ohland
Publisher: PEARSON
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Chapter 9.4, Problem 4CC

The Euler number is a function of the pressure drop, velocity, and density. Determine the form of the Euler number with Rayleigh’s method.

Pressure drop ΔP pascal[Pa]
Density ρ grams per cubic centimeter [g/cm3]
Velocity ν meters per second[m/s]
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3. Consider the following equation. All three of the terms in parentheses are dimensionless groups. Because kc is difficult to determine directly, the other variables are measured and kc is calculated from the given equation. 26 THERMODYNAMICS 1 MODULE 1 FUNDAMENTAL CONCEPTS ]3 [ _d>vp_jo8 p DAB kc D = 0.023 [H DAB What is the estimated value of kc? What are the units of kc? Show your work. The following values were measured: D = 8.0 mm, DAB = 0.475 cm²/s, µ = 1.12 x 103 N-s/m², p = 1.00 x 10-³ g/cm³, v = 15.0 m/s.
Pressure drop AP depends on four variables: the diameter of the pipe D, the density of the fluid p, the kinematic viscosity of the fluid v and the mean velocity v. Applying Buckinham's Pi Theorem, a dimensionless pi-group can be identified using the following power product: [AP] = [D]ª[p]b[v][v]ª. Which of the following statements in term of [T] is correct? Select one: O [T]: -2 = -c-d [T]: -1 = -c-d [T]: -2 = -c-2*d [T]: -2 = -2*c-d [T]: -2=-c+d
To understand the heat transfer from a bar in cross flow, you conduct a series of experiments measuring the average heat transfer coefficient as a function of the free stream velocity. A schematic of the experiment and the accompanying results are shown below. L = 0.3 m h [W/m²-K] 60 40 V [m/s] 20 15 a) You expect the important dimensionless parameters to be related by a function of the form Nu = CRe Pr where C, m, and n are constants. The film temperature in both the experiments is approximately the same. Use the given experimental results to determine the constant m b) Calculate h for L = 0.75 m and V = 30 m/s.

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Thinking Like an Engineer: An Active Learning Approach (4th Edition)

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