Pressure difference required for pipe with elevation change. Water at 68°F is to be pumped through 95 ft of standard 3-in. pipe (internal diameter 3.068 in.) into an overhead reservoir as illustrated in Fig. 6A.2. 45° elbow Pump 45° elbow 45° Fig. 6A.2 Pipe flow system. (a) What pressure is required at the outlet of the pump to supply water to the overhead reser- voir at a rate of 18 gal/min? At 68°F the viscosity of water is 1.002 cp and the density is 0.9982 g/ml. (b) What percentage of the pressure drop (pump outlet to reservoir) is needed for overcoming the pipe friction? Answer: (a) 15.3 psig

Pressure difference required for pipe with elevation change. Water at 68°F is to be pumped through 95 ft of standard 3-in. pipe (internal diameter 3.068 in.) into an overhead reservoir as illustrated in Fig. 6A.2. 45° elbow Pump 45° elbow 45° Fig. 6A.2 Pipe flow system. (a) What pressure is required at the outlet of the pump to supply water to the overhead reser- voir at a rate of 18 gal/min? At 68°F the viscosity of water is 1.002 cp and the density is 0.9982 g/ml. (b) What percentage of the pressure drop (pump outlet to reservoir) is needed for overcoming the pipe friction? Answer: (a) 15.3 psig

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Applied Fluid Mechanics

A fluid is a substance that is continuously deformed by the application of shear stress. The rate of deformation of a fluid depends on its viscosity. The fluid tries to flow when it interacts with some other system.

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Pressure difference required for pipe with elevation change. Water at 68°F is to be pumped
through 95 ft of standard 3-in. pipe (internal diameter 3.068 in.) into an overhead reservoir as
illustrated in Fig. 6A.2.
45° elbow
Pump
15
45° elbow
50
-30-
Fig. 6A.2 Pipe flow system.
(a) What pressure is required at the outlet of the pump to supply water to the overhead reser-
voir at a rate of 18 gal/min? At 68°F the viscosity of water is 1.002 cp and the density is
0.9982 g/ml.
Q
(b) What percentage of the pressure drop (pump
the pipe friction?
Answer: (a) 15.3 psig
outlet
F
to reservoir) is needed for overcoming
X
VX
Do
8

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