Water is pumped through a vertical steel pipe to an elevated tank. D = 10 cm, P₁= 1.6 MPa, L = 80 m, Q = 0.02 m³/s. Find: Pressure at point 80 m above pump, "P₂=?" Properties: Water (20 °C), Table A.5: 7=9790 N/m³. Sol. Tips: First Compute "Re", and "Relative roughness". Plot them on chart below to mark value of friction coefficient "f=?". Then Compute friction head loss "hf=?", and compute pressure by Bernoulli equation! Resistance coefficient,/ 0.100 0.090 0.080 0.070 0.060 0.050 0.040 0.030 0.025 0.020 0.015 0.010 0.009 0.008 Laminar flow 10³ 2 10³ 2 468104 2 68104 2 Ref¹/2- 4 -D2/2 (201)¹/2 68105 2 Fully rough turbulent flow 6 810 Smooth pipes 2 Re=VD 4 468105 6 8106 2 2 0.05 0.04 0.03 0.02 0.015 0.01 0.0081 0.006 0.004 0.002 0.001 8:8888 0.0006 0.0004 0.0002 0.0001 0.00005 0.00001 8108 Relative roughness, D

Water is pumped through a vertical steel pipe to an elevated tank. D = 10 cm, P₁= 1.6 MPa, L = 80 m, Q = 0.02 m³/s. Find: Pressure at point 80 m above pump, "P₂=?" Properties: Water (20 °C), Table A.5: 7=9790 N/m³. Sol. Tips: First Compute "Re", and "Relative roughness". Plot them on chart below to mark value of friction coefficient "f=?". Then Compute friction head loss "hf=?", and compute pressure by Bernoulli equation! Resistance coefficient,/ 0.100 0.090 0.080 0.070 0.060 0.050 0.040 0.030 0.025 0.020 0.015 0.010 0.009 0.008 Laminar flow 10³ 2 10³ 2 468104 2 68104 2 Ref¹/2- 4 -D2/2 (201)¹/2 68105 2 Fully rough turbulent flow 6 810 Smooth pipes 2 Re=VD 4 468105 6 8106 2 2 0.05 0.04 0.03 0.02 0.015 0.01 0.0081 0.006 0.004 0.002 0.001 8:8888 0.0006 0.0004 0.0002 0.0001 0.00005 0.00001 8108 Relative roughness, D

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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