Applied Fluid Mechanics (7th Edition)
7th Edition
ISBN: 9780132558921
Author: Robert L. Mott, Joseph A. Untener
Publisher: PEARSON
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Chapter 11, Problem 11.16PP
Oil with a specific gravity of 0.93 and a dynamic viscosity of
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1. An 80 mm schedule 40 steel pipe is 1800 m long and carries a lubricating oil between 2 points A and B such that the Reynolds number is 1200. Point B is 10 m higher than point A. The oil has a specific gravity of 0.85 and dynamic viscosity of 6.51 X 10-1 Pa.s. If the pressure at A is 345 KPa, calculate the pressure @ B.
2. Determine the energy loss for a sudden contraction from a 4 in schedule 80 steel pipe to a 1.5 in schedule 80 pipe for a flow rate of 250 gal/min.
3. Determine the equivalent length in meters of pipe of a quarter open gate valve placed in a DN 250 schedule 40 pipe.
4. A crude oil of viscosity 0.9 poise and sp. gr. 0.8 is flowing through a horizontal circular pipe of diameter
80 mm and of length 15 m. Calculate the difference of pressure at the two ends of the pipe, if 50 kg of the
oil is collected in a tank in 15 seconds.
A 3-in Schedule 40 steel pipe is 5000 ft long and carries a lubricating oil between two points A and B such that the Reynolds number is 800. Point B is 20 ft higher than A. The oil has a specific gravity of 0.90 and a dynamic vis- cosity of 4 x 10lb-s/ft. If the pressure at A is 50 psig. calculate the pressure at B.
Chapter 11 Solutions
Applied Fluid Mechanics (7th Edition)
Ch. 11 - Water at 10C flows from a large reservoir at the...Ch. 11 - For the system shown in Fig. 11.14, kerosene (...Ch. 11 - Figure 11.15 shows a portion of a hydraulic...Ch. 11 - Figure 11.16 shows part of a large hydraulic...Ch. 11 - Oil is flowing at the rate of 0.015m3/s in the...Ch. 11 - For the system shown in Fig. 11.18, calculate the...Ch. 11 - A liquid refrigerant flows through the system,...Ch. 11 - Water at 100F is flowing in a 4-in Schedule 80...Ch. 11 - A hydraulic oil is flowing in a drawn steel...Ch. 11 - In a processing plant, ethylene glycol at 77F is...
Ch. 11 - Water at 15C is flowing downward in a vertical...Ch. 11 - Turpentine at 77F is flowing from A to B in a 3...Ch. 11 - ]11.13 A device designed to allow cleaning of...Ch. 11 - Kerosene at 25C is flowing in the system shown in...Ch. 11 - Water at 40C is flowing from A to B through the...Ch. 11 - Oil with a specific gravity of 0.93 and a dynamic...Ch. 11 - Determine the required size of new Schedule 80...Ch. 11 - What size of standard hydraulic copper tube from...Ch. 11 - Water at 60F is to flow by gravity between two...Ch. 11 - The tank shown in Fig. 11.24 is to be drained to a...Ch. 11 - Figure 11.25 depicts gasoline flowing from a...Ch. 11 - For the system in Fig. 11.26, compute the pressure...Ch. 11 - For the system in Fig. 11.26, compute the total...Ch. 11 - For the system in Fig. 11.26 specify the size of...Ch. 11 - A manufacturer of spray nozzles specifies that the...Ch. 11 - Specify the size of new Schedule 40 steel pipe...Ch. 11 - Refer to Fig. 11.27. Water at 80C is being pumped...Ch. 11 - For the system shown in Fig. 11.27 and analyzed in...Ch. 11 - In a water pollution control project, the polluted...Ch. 11 - Repeat Problem 11.29, but use a 3-in Schedule 40...Ch. 11 - Water at 10C is being delivered to a tank on the...Ch. 11 - If the pressure at point A in Fig. 11.29 is 300...Ch. 11 - Change the design of the system in Fig. 11.29 to...Ch. 11 - It is desired to deliver 250 gal/min of ethyl...Ch. 11 - For the system shown in Fig. 11.30, compute the...Ch. 11 - Repeat Problem 11.35, but consider the valve to be...Ch. 11 - Repeat Problem 11.35, but consider the valve to be...Ch. 11 - Figure 11.31 depicts a DN 100 Schedule 40 steel...Ch. 11 - Repeat Problem 11.38 but replace the globe valve...Ch. 11 - Repeat Problem 11.38 but use a DN 125 Schedule 40...Ch. 11 - Repeat Problem 11.38, but replace the globe valve...Ch. 11 - It is desired to drive a small,...Ch. 11 - Figure 11.32 shows a pipe delivering water to the...Ch. 11 - Repeat Problem 11.43, except consider that there...Ch. 11 - A sump pump in a commercial building sits in a...Ch. 11 - For the system designed in Problem 11.45, compute...Ch. 11 - Figure 11.33 shows a part of a chemical processing...Ch. 11 - For the system described in Problem 11.47, and...Ch. 11 - For the system described in Problem 11.47, and...Ch. 11 - For the system described in Problem 11.47, and...Ch. 11 - Analyze the system shown in Fig. 11.11 with...Ch. 11 - Create a program or a spreadsheet for analyzing...Ch. 11 - Create a program or a spreadsheet for determining...
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- The picture below depicts a system for delivering chocolate ganache in liquid form. Thenozzle on the end of the hose requires 140 kPa of pressure to operate effectively. Thehose is smooth plastic with an ID of 25 mm. The chocolate has a specific gravity of 1.1and a dynamic viscosity of 2.0 X 10-3 Pa*s. If the length of the hose is 85 m and there is a change in height of 10 m, determine(a) the power delivered by the pump to the ganache and(b) the pressure at the outlet of the pump.Neglect the energy losses on the suction side of the pump. The flow rate is 85 L/min.arrow_forwardAnswer the problem correctly and provide complete and readable solutions. If you can explain the process (briefly), please do so. Thank you!arrow_forwardB1. A water with viscosity 11.4x10-3 poise is flowing through a pipe of diameter 300 mm at the rate of 500 litres per sec. Find the Reynold's Number & the head lost due to friction in the pipe of length 1 km. (Enter only the values by referring the unit given. Also upload the hand written answers in the link provided) The velocity of flow of water (in m/s) is The value of Reynold's Number is The frictional loss in the pipe (in m) isarrow_forward
- 2. Castor oil flows through a pipe that has a cross-section of an equilateral triangle with a side length of 10 cm. The volume flow rate of the oil was measured to be 1.2 liters/second. The absolute viscosity of castor oil is about 650 cP. Calculate the Reynolds number and identify the type of flow.arrow_forwardEx. 2.11 A pump delivering 230 Ips of water whose absolute viscosity is 0.0114 Poise has a 300-mm diameter suction pipe and a 254-mm diameter discharge pipe as shown in the figure below. The suction pipe is 3.5 m long and the discharge pipe is 23 m long. The water is delivered 16 m above the intake water level. Considering the head losses in fittings and valves, find the head which the pump must supply. If the motor brake power of the driving motor is 75 kW, what is the efficiency of the pump? Assume the pipe material as cast iron. Given: A figure showing a pumping installation Q= 230 Ips D = 300 mm D = 254 mm H = 0.0114 Poise = 0.00114 Pa-s BP = 75 kW %3D %3D Standard elbow Standard elbow Discharge reservoir Long sweep elbow z=z, +2, Pump Source Foot valve & strainer Required: a) The total dynamic head b) The pump efficiency wilz,arrow_forwardShow complete solution and formulas used. Show the schematic diagram too. Calculate the required pipe diameter to avoid cavitation, if the pump delivers Q = 30US gallon/min water from a closed tank, where the pressure (above the water level) is p = 40kPa. The equivalent length of the smoothened concrete pipe on the suction side is 12m while the suction flange of the pump is 8m below the water level. The vapour pressure at the given water temperature is 2.8kPa. The required net positive suction head is NPSHr = 3.2m.arrow_forward
- A liquid of viscosity 5.2x10-5 Ibf-sec/ft? is flowing in a rectangular duct. The equation of the symmetrical velocity (in ft/s) is approximately V=0.3y0./ ft/s where y is in inches. Compute the shear stress of the fluid at y=3 inches from the wall.arrow_forwardAn oil with a specific gravity of 0.84 and a viscosity of 50 cp is flowing downwards in a vertical pipe of inside diameter 3 in. If the water-oil manometer connected to a pitot tube, shows a reading of 25 in, calculate the maximum velocity of the flow of oil in the pipe. Reynolds number of the flow of oil in the pipe. average velocity of the flow of oil in the pipe. piezometric head due to the pitot tube. volumetric flow rate of oil.arrow_forwardAn inclined pipe of 4-inch ID is used to transport a viscous oil from one open-top container A to another open-top container B. The specific gravity of the oil is 0.9 and the viscosity of the oil is 20 cp. The length of the pipe is 100 ft. Oil levels in these two containers are shallow and the inlet and outlet pressures across the tube can be assumed to be identical – both 1 atm. What is the angle needed to maintain a flow rate of oil of 1 cuft / second? The levels of oil in A and B do not change – oil is continually added to A at the rate of 1 cuft / second and is continuously removed from B at the same rate. Aarrow_forward
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