Chapter 3, Problem 27P

The Hazen Williams equation can be used to calculate the pressure drop, P_d(psi/ft of pipe) in pipes due to friction:

$P_d=4.52Q^{1.85}/(C^{1.85}{d}^{4.87})$

Where Q is the flow rate (gpm), C is a design coefficient determined by the type of pipe, and d is pipe diameter in inches. Consider a 3.5-in.-diameter steel pipe with C = 120. Calculate the pressure drop in a 1000-ft-long pipe for flow rates of 250, 300, 350, 400, and 450 gpm. To carry out the calculation, first create a five-element vector with the values of the flow rates (250, 300,…). Then use the vector in the formula using element-by-element operations.