1. Oil of density 860 kg/m3 has a kinematic viscosity of 40 cSt. Calculate thecritical velocity when it flows in a pipe 50 mm bore diameter.2. Oil flows in a pipe 80 mm radious with a mean velocity of 4 m/s. The meansurface roughness is 0.02 mm and the length is 60 m. The dynamic viscosityis 0.005 N s/m2 and the density is 900 kg/m3. Determine the pressure loss.

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Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter7: Seepage

Section: Chapter Questions

Problem 7.1P

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A horizontal, circular pipe connects two big reservoirs, 1 and 2. The length of the pipe is 100 m. The pipe diameter is suddenly increased from 300 to 600 mm at the midpoint between the two reservoirs. The loss coefficient at the pipe entrance is 0.50. The frictional coefficients in the smaller and larger pipes are 0.030 and 0.020, respectively. The water flow rate, Q, is 18 m3/min. Calculate the water surface height difference, H.
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1. Oil of density 860 kg/m3 has a kinematic viscosity of 40 cSt. Calculate the critical velocity when it flows in a pipe 50 mm bore diameter.