PROBLEMS ON FLUID FLOW IN PIPES1. What is the hydraulic radius of a rectangular air duct 300mm by500mm?2. Air at 1500kPa absolute flows in 25mm-diamter tube. What is themaximum laminar flow rate. Use density of air-14.04kg/cu.m andμ=0.0000217Pa-s3. The flow rate of water through a cast iron pipe is 5000GPM. Thediameter of the pipe is 330mm, and the coefficient of friction isf=0.0173. What is the pressure drop over a 30m length of pipe4. A tube 15m long is to connect two large tanks whose differencein water level is 2m. The tube is to carry 5L/s of flow. Whatminimum size of tube is necessary to assure laminar flowcondition?5. The water system in a suburban area consists of an old 200mmpipeline 760m long which conveys water from a pump to areservoir whose water surface is 107m higher than the pump.Water is pumped at the rate of 0.07cu.m/sec. Determine thehorsepower saved by replacing the old pipe with a newpipe. Assume the value of f as equal to 0.033 and 0.022respectively, for the old and new pipes. Neglect losses of headexcept friction head.

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Engineering

Civil Engineering

1. What is the hydraulic radius of a rectangular air duct 300mm by 500mm?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

PROBLEMS ON FLUID FLOW IN PIPES
1. What is the hydraulic radius of a rectangular air duct 300mm by
500mm?
2. Air at 1500kPa absolute flows in 25mm-diamter tube. What is the
maximum laminar flow rate. Use density of air-14.04kg/cu.m and
μ=0.0000217Pa-s
3. The flow rate of water through a cast iron pipe is 5000GPM. The
diameter of the pipe is 330mm, and the coefficient of friction is
f=0.0173. What is the pressure drop over a 30m length of pipe
4. A tube 15m long is to connect two large tanks whose difference
in water level is 2m. The tube is to carry 5L/s of flow. What
minimum size of tube is necessary to assure laminar flow
condition?
5. The water system in a suburban area consists of an old 200mm
pipeline 760m long which conveys water from a pump to a
reservoir whose water surface is 107m higher than the pump.
Water is pumped at the rate of 0.07cu.m/sec. Determine the
horsepower saved by replacing the old pipe with a new
pipe. Assume the value of f as equal to 0.033 and 0.022
respectively, for the old and new pipes. Neglect losses of head
except friction head.

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