Unformatted text preview: another 100 m at an increased d 2 cm. The doublepipe system slopes upward
at 35° in the flow direction. Estimate (a) the total pressure
change and (b) the power required to drive the flow.
P6.33 For the configuration shown in Fig. P6.33, the fluid is ethyl
alcohol at 20°C, and the tanks are very wide. Find the flow
rate which occurs in m3/h. Is the flow laminar? 50 cm 2 mm 40 cm 10 ft
80 cm
1m Q
L = 6 ft
D = 1 in
2 P6.27  v v P6.33
P6.28 In Prob. 6.27 what will the flow rate be, in m3/h, if the
fluid is SAE 10 oil at 20°C?
P6.29 Oil, with
890 kg/m3 and
0.06 kg/(m s), is to be P6.34 For the system in Fig. P6.33, if the fluid has density of 920
kg/m3 and the flow rate is unknown, for what value of vispumped through 1 km of straight horizontal pipe with a
cosity will the capillary Reynolds number exactly equal
power input of 1 kW. What is the maximum possible mass
the critical value of 2300?
flow rate, and corresponding pipe diameter, if laminar flow
*P6.35 Let us attack Prob. 6.33 in symbolic fashion, using Fig.
is to be maintained?
P6...
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 Spring '08
 Sakar
 Fluid Dynamics, eText Main Menu, Osborne Reynolds

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