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Unformatted text preview: ) mercury, or (f) glycerin.
Cola, approximated as pure water at 20°C, is to fill an 8oz container (1 U.S. gal 128 fl oz) through a 5mmdiameter tube. Estimate the minimum filling time if the tube
flow is to remain laminar. For what cola (water) temperature would this minimum time be 1 min?
When water at 20°C is in steady turbulent flow through an
8cmdiameter pipe, the wall shear stress is 72 Pa. What
is the axial pressure gradient ( p/ x) if the pipe is (a) horizontal and (b) vertical with the flow up?
A light liquid (
950 kg/m3) flows at an average velocity of 10 m/s through a horizontal smooth tube of diameter 5 cm. The fluid pressure is measured at 1m intervals
along the pipe, as follows:
0 1 2 3 4 5 304 273 255 240 226 213 6
200 Estimate (a) the average wall shear stress, in Pa, and (b) the
wall shear stress in the fully developed region of the pipe.
P6.10 Water at 20°C flows through an inclined 8cmdiameter
pipe. At sections A and B the following data are taken:
pA 186 kPa, VA 3.2 m/s, zA 24.5 m, and pB 260
kPa, VB 3.2 m/s, zB 9.1 m. Which way is the flow going? What is the head loss i...
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 Spring '08
 Sakar

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