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Applied Fluid Mechanics (7th Edition)
7th Edition
ISBN: 9780132558921
Author: Robert L. Mott, Joseph A. Untener
Publisher: PEARSON
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Textbook Question
Chapter 8, Problem 8.77PP
In a given installation, it is determined that the pipe size used for the project was
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Question 8
Two reservoirs are connected by a pipe whose total length is 360m.From the upper reservoir the pipe is 300mm in diameterfor a length of 150m and the remaining 210m is 450mm in diameter.The difference in water levels between the two reservoirs are 8m.Take f=0.006 for the smaller pipe and f=0.005 for the larger pipe.If all the changes in pipe sections are sharp and sudden, calculate the flow rate which can be delivered.
Question # 3
A 150 mm diameter pipe reduces in diameter abruptly to 100
mm. If the pipe carries water at 30 litres s', calculate the
pressure loss across the contraction and express this as a
percentage of the loss to be expected if the flow was reversed.
Take the coefficient of contraction as 0.6.
QUESTION 4
A vertical pipe is shown in figure 1 below. The pipe tapers from 50 mm in
diameter to 25 mm in diameter. If 2 liters of water per minute flow upwards
through the pipe the pressure difference across the pipe is 35 kPa. Calculate
the flow downwards through the pipe if the pressure across the pipe is to be
K(v3-ví) where v, and v2
zero. The losses across the pipe are given by h1
2g
are the velocities in the 50 mm and 25 mm sections respectively.
50 mm
1.5 m
25 mm
Figure 1
Chapter 8 Solutions
Applied Fluid Mechanics (7th Edition)
Ch. 8 - A 4-in-ductile iron pipe carries 0.20ft3/s of...Ch. 8 - Calculate the minimum velocity of flow in ft/s of...Ch. 8 - Calculate the maximum volume flow rate of fuel oil...Ch. 8 - Calculate the Reynolds number for the flow of each...Ch. 8 - Determine the smallest metric hydraulic copper...Ch. 8 - In an existing installation, SAE 10 oil (sg = 0.89...Ch. 8 - From the data in Appendix C, we can see that...Ch. 8 - Compute the Reynolds number for the flow of 325...Ch. 8 - Benzene (sg = 0.86 ) at 60c C is flowing at 25...Ch. 8 - Hot water at 80 C is flowing to a dishwasher at a...
Ch. 8 - A major water main is an 18 -in ductile iron pipe....Ch. 8 - ]8.12 An engine crankcase contains SAE 10 motor...Ch. 8 - Repeat Problem 8.12 for an oil temperature of 160...Ch. 8 - At approximately what volume flow rate will propyl...Ch. 8 - SAE 30 oil (sg = 0.89 ) is flowing at 45 L/min...Ch. 8 - Repeat Problem 8.15 for an oil temperature of 160...Ch. 8 - Repeat Problem 8.15, except the tube is 50 mm...Ch. 8 - Repeat Problem 8.17 for an oil temperature of 0 C.Ch. 8 - The lubrication system for a punch press delivers...Ch. 8 - After the press has run for some time, the...Ch. 8 - A system is being designed to carry 500 gal/min of...Ch. 8 - The range of Reynolds numbers between 2000 and...Ch. 8 - The water line described in Problem 8.22was a cold...Ch. 8 - In a dairy, milk at 100 F is reported to have a...Ch. 8 - In a soft-drink bottling plant, the concentrated...Ch. 8 - ]8.26 A certain jet fuel has a kinematic viscosity...Ch. 8 - Crude oil is flowing vertically downward through...Ch. 8 - Water at 75 C is flowing in a standard hydraulic...Ch. 8 - Fuel oil is flowing in a 4 -in Schedule 40 steel...Ch. 8 - A 3-in Schedule 40 steel pipe is 5000 ft long and...Ch. 8 - Benzene at 60 C is flowing in a DN 25 Schedule 80...Ch. 8 - As a test to determine the effective wall...Ch. 8 - Water at F flows from a storage tank through ft...Ch. 8 - A water main is an 18 -in-diameter concrete...Ch. 8 - Figure 8.12shows a portion of a fire protection...Ch. 8 - A submersible deep-well pump delivers 745 gal/h of...Ch. 8 - On a farm, water at 60 F is delivered from a...Ch. 8 - Figure 8.15 shows a system for delivering lawn...Ch. 8 - A pipeline transporting crude oil (sg = 0.93 ) at...Ch. 8 - For the pipeline described in Problem 8.39,...Ch. 8 - Water at 10 C flows at the rate of 900 L/min from...Ch. 8 - For the system shown in Fig. 8.17, compute the...Ch. 8 - Fuel oil (sg = 0.94 ) is being delivered to a...Ch. 8 - Figure 8.18 shows a system used to spray polluted...Ch. 8 - In a chemical processing system, the flow of...Ch. 8 - Water at 60 F is being pumped from a stream to a...Ch. 8 - For the pump described in Problem 8.46, if the...Ch. 8 - Gasoline at 50 F flows from point A to point B...Ch. 8 - Figure 8.20 shows a pump recirculating 300 gal/min...Ch. 8 - Linseed oil at 25 C flows at 3.65 in a standard...Ch. 8 - Glycerin at 25 C flows through a straight...Ch. 8 - Water at 75 C flows in a standard hydraulic copper...Ch. 8 - Benzene (sg = 0.88 ) at 60 C, flows in a DN 25...Ch. 8 - Water at 80 F flows in a 6 -in coated ductile iron...Ch. 8 - Water at 50 F flows at 15.0 ft3/s in a concrete...Ch. 8 - Water at 60 F flows at 1500 gal/min in a 10 -in...Ch. 8 - ]8.57 A liquid fertilizer solution (sg = 1.10 )...Ch. 8 - Crude oil (sg = 0.93 ) at 100 C flows at a rate of...Ch. 8 - Water at 65 C flows in a DN 40 Schedule 40 steel...Ch. 8 - Propyl alcohol flows in a standard hydraulic...Ch. 8 - ]3.61 Water at 70 F flows in a 12 -in-diameter...Ch. 8 - Heavy fuel oil at 77 F flows in a 6 -in Schedule...Ch. 8 - Water flows at a rate of 1.50ft3/s through 550 ft...Ch. 8 - Compute the energy loss as water flows in a...Ch. 8 - ]8.65 A water main is an 18 -in-diameter concrete...Ch. 8 - A fire protection system includes 1500 ft of 10...Ch. 8 - ]8.67 A standard hydraulic copper tube, 120 mm...Ch. 8 - Compute the energy loss as 2.0ft3/s of water flows...Ch. 8 - It is desired to flow 2.0ft3/s of water through...Ch. 8 - Specify a suitable size of new, clean Schedule 40...Ch. 8 - For the pipe selected in Problem 8.70, compute the...Ch. 8 - Compare the head loss that would result from the...Ch. 8 - In Problem 6.107, a theoretical flow rate of water...Ch. 8 - A pipeline is needed to transport medium fuel oil...Ch. 8 - Medium fuel oil at 25 C is to be pumped at a flow...Ch. 8 - A tremendous amount of study has gone into the...Ch. 8 - In a given installation, it is determined that the...Ch. 8 - "Laminar" fountains have become quite popular due...Ch. 8 - Use PIPE-FLO to model a straight horizontal run of...
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- 10.) A horizontal pipe gradually reduces from 300 mm diameter section to 100 mm diameter section. The pressure at the 300 mm section is 100 kPa and at the 100 mm section is 70 kPa. If the flow rate is 15 liters/sec of water, compute the head lost between the two sections. Answer: 2.872m Subject: Fluid Mechanic Lesson: Relative Equilibrium of Liquids Fundamentals of Fluid Flowarrow_forwardItem#3 A pipe handles a flow rate of 0.002 m³/s. Find the minimum inside diameter that will provide an average fluid velocity not to exceed 6.1 m/s.arrow_forwardQ5) Explain the major and minor losses? Then solve for the parallel pipes system shown below, a pump is placed in line 2 so that 0.142 m³/s will flow through each pipe. Pipe material is cast iron and for each elbow. Find the relation between the head loses hi and h12 and estimate the necessary pump head. Water viscosity is u-1x10³ Pa.s. Line 1, L-30 m, D-6 inches Q,-0.142 m/s Pump Line 2, L-30 m, De 3 inches Q-0.142 m/s GOOD LUCKarrow_forward
- a)Determine the headloss in Pipe 1-5 (in feet).b) Determine the flow in the upper branch pipe Q2 (in cfs).arrow_forwardA pumped fluid distribution system is being designed to deliver 400 gal/min of water to a cooling system in a power generation plant. Use the figure below to make an initial selection of Schedule 40 pipe sizes for the suction and discharge lines for the system. Also, solve for the actual average velocity of flow for each pipe.arrow_forwardBased on the layout of the water supply system, as show in Figure 1, the pressure, in psi, is estimated be 46 at the faucet in the and floor of the residential building. Consider flow through the delivery pipe, Q = 1.50 cfs and diameter of the pipe, D = 2.65 inch with e = 0.015 inch. Ingore the minor pressure losses and use the following formulae to calculate the major pressure losses. The additional power in hp required to provide the recommended pressure of 58 psi at the building is nearly. Assume f = 0.0175. Use g = 62.4 lb/f3 for water. Water temperature is 20°C (68°F).arrow_forward
- A pumping system is required that will deliver at least 50,000 GPM against a head of 100 ft is needed for a water ride. The system schematic is given below. Note that the loss coefficient for the pumps accounts for the losses in piping connecting multiple pumps. Use Gould pumps to satisfy this requirement. Submit your loss curve superimposed on the pump curves for the selected pumps in your Excel file. Determine the following. a. The pumps (all the same) to satisfy this requirement. b. The operating point of these pumps. C. NPSHR d. NPSHA K, = 0.28 L, = 50 ft L = 300 ft E = 0.005 ft D = 3.5 ft Q=50,000 GPM u= 2.359x105 slug/ft-s p= 1.938 slug/ft = 1.0 Kext 100 ft K, = 0.6 K, = 0.4 7 ft Pump System K, = 0.28 %3D Kant = 0.5arrow_forwardThe pressure through a section of pipe is 21 PSI and the velocity of the fluid is 1 ft/sec. If the velocity were increased to 4 ft/sec, what would the pressure drop be?arrow_forward2. Water steadily flows from the basement to the second floor through a 0.75-in-diameter copper pipe. The volume flow rate is constant as Q = 12 gal/min (gpm). Water exits through a faucet having a diameter of 0.5 in. Consider all losses, and determine the pressure at (1) required to maintain the constant volume flow rate. If needed, use the tables below and the Moody chart on the last page. Water has a density of 1.94 slug/ft3 and a viscosity of 2.34 x 10-5 psf s, and the gravitational acceleration is g = 32.2 ft/s². The following conversion relations can be used: 1 ft = 12 in, 1 gal = 0.160544 ft³. KL 0.6 0.4 0.2 0 Q-12 gpm Copper Commercial steel or wrought iron 0.2 Pipe Riveted steel Cast iron A₁ 0.4 (1) A₂/A₁ 0.75-in-diameter copper pipe 0.6 15 ft 10 ft A 0.8 (6) 5 ft (3) 1.0 (5) 10 ft 10 ft (7) (8) •∞• 10 ft 8 Threaded 90 elbows Loss coefficients for pipe components KL Elbow, regular 90°, flanged 0.3 Tee, flanged 1.0 Faucet 2.0 0.05 10 0.15 2 1.5 Ball valve, fully open Globe,…arrow_forward
- A 400 gpm piping system is composed of the following pipes and fittings. Using the chart; Determine the Following: a. Equivalent length at suction in ft b. Equivalent length at discharge in ft c. Total friction loss in the installation, in ft. Suction side (4.5” Փ) Length of straight pipe 210 ft Long sweep elbow 5 pcs Standard Tee 2 pcs Globe valve 1 pc Checked valve 1 pc Gate valve (fully open) 1 pc Discharge side (4.0” Փ) Straight pipe 200 ft Standard elbow 4 pcs Standard Tee 3 pcs Gate valve (fully open) 1 pcarrow_forwardQ2' A pipe with a radius of 15 mm is attached to a garden hose with a nozzle. If the velocity of flow in the pipe is 4 m/s, what is the velocity of the flow at the nozle when it is adjusted to have a diameter of 16 millimeters, and what is the flow rate?arrow_forwardQ1: If flow rate in pipe shown is (0.5m'Is) find the (H). H. water D=300 mmarrow_forward
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