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In a water pollution control project, the polluted water is pumped vertically upward 80 ft and then sprayed into the air to increase the oxygen content in the water and to evaporate volatile materials. The system is sketched in Fig. 11.28. The polluted water has a specific weight of 64.0 lb/ft3 and a dynamic viscosity of
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Applied Fluid Mechanics (7th Edition)
- Water enters through a 500 mm diameter inlet pipe under a pressure of 15 kPa. It leaves through a 1000 mm diameter exhaust pipe with a pressure of 5 kPa. If the center of the outlet pipe is 3 m above the center of the inlet pipe and 500 L/sec of water passes a motor or pump. Which of the following most nearly gives the specific gravity of the block? a. 1.6320 b. 0.6814c. 0.3196 d. 1.3186arrow_forwardFor each statement, choose whether the statement is true or false, and discuss your answer briefly: (a) A gear pump is a type of positive-displacement pump. (b) A rotary pump is a type of positive-displacement pump. (c) The pump performance curve (net head versus capacity) of a positive-displacement pump is nearly vertical throughout its recommended operating range at a given rotational speed. (d) At a given rotational speed, the net head of a positivedisplacement pump decreases with fluid viscosity.arrow_forwardA fire hose has an inside diameter of 6.5 cm. Suppose such a hose carries a water flow of 40.5 L/s starting at a gauge pressure of 1.68 × 106 N/m2 . The hose discharges through a nozzle having an inside diameter of 3.4 cm. Take the viscosity of water to be 1.005 × 10-3 (N/m2)⋅s dh = 6.5 cmdn = 3.4 cmP = 1.68 × 106 N/m2Q = 40.5 L/s a. the Reynolds number, NR, for flow in the fire hose to show that the flow must be turbulent, with NR≥ 3000. b. Calculate the Reynolds number, NR, for flow in the fire hose and nozzle to show that the flow must be turbulent, with NR≥ 3000.arrow_forward
- 1) For a flow in a circle pipe, the Reynolds number is determined to be 1800. This flow is: a) cannot be determined b) transitional flow c) turbulent flow d) Laminar flow 2) A fluid flows through a round pipe. The Reynolds number is 8×105. The roughness and diameter of the pipe are 0.01 mm and 10 cm, respectively. Based on the Moody Chart, what is the Darcy friction factor? a) 0.014 b) 0.020 c) 0.022 d) 0.010 3) In irrotational flow region, the frictional effects cannot be neglected and the velocity is a constant in the radial direction. True or Falsearrow_forwardAir flows through a duct at 2,700 cubic feet per minute (CFM). After several feet and a few vents, the air-flow decreases to 1,890 CFM. What is the percent drop that has occurred? (Simplify your answer completely.)arrow_forward1. Atmospheric pressure is about 80 kPa (absolute). Water pressure at the base of a water tower is 600 kPa (gauge). Determine the following: Gauge pressure at the base of the tower Absolute pressure at the base of the tower A pipe carries water at a flow rate of 90 L/s. Determine the minimum inside diameter so that the average velocity of the fluid does not exceed: 3 m/s 2 m/s 4 m/s A 20 mm diameter copper pipe (19.94 mm inside diameter) carries water at a flow rate of 40 L/s. Determine the average velocity of the fluid.arrow_forward
- A pump is installed to deliver water from a reservoir of surface elevation zero, to another of elevation 290 ft. The 10 inch-diameter suction pipe (f=0.022) is 90 ft long and the 8-in-diameer discharge pipe (f=0.028) is 4900 ft long. The pump characteristic is defined by hp= 365-20Q2 where hp, the pump head, is in feet and Q is in cubic feet per second. What is the rate at which the pump will deliver the water?arrow_forwardOne end of a capillary tube 10 cm in length and 1 mm in diameter is connected to a water supply which has a pressure of 2 atm. The viscosity coefficient of water is 0.01 poise. How much water does the tube deliver in one second? (1 atm = 106 dynes/cm2)arrow_forwardThe water level in a tank is 34 ft above the ground. A hose is connected to the bottom of the tank at the ground level and the nozzle at the end of the hose is pointed straight up. The tank cover is airtight, but the pressure over the water surface is unkown. Determine the minimum tank air pressure (gage) that will cause a water stream from the nozzle to rise 72 ft from the ground. A. 13.5 psi B. 14.4 psi C. 16.5 psi D. 15.5 psi With F.B.D.arrow_forward
- A fluid at a certain temperature has a viscosity of 37.1 cP and a specific gravity of 0.8022. 49508.6 bbl of this fluid per day is transferred from a far-flung source 501.55 miles away using a 18.1 ID steel pipe. Given that the pump has an efficiency of 68.82%, what is the actual power requirement in kW Answer options: 269 8554 6949 1039 3236arrow_forwardQuestion 7 A liquid, with a density of 850 kg/m3 , is flowing downwards through a vertical pipe from a point a to a point B.The diameter at A is 150mm and the diameter at B is 75mm.Point B is 2.4m below point A.If 21 dm3 /s of the liquid flows through the pipe, the pressure gauges (connected at A and B) indicates a pressure difference of 12kPa.The loss of head across the pipe between A and B is given as KV2 /2g , where V is the velocity at A.Calculate the value of K.arrow_forward1) A smooth steel pipe of diameter 500 mm and length 850 m carry water at the rate of 0.05 m3/sec. Find the head lost due to friction. Take Kinematic Viscosity of water as 0.018 x 10 m2/sec 2)Determine the friction factor, “f” if Ethyl Alcohol at 25 C is flowing at 5.3 m/sec in a standard DN 40 Schedule 80 steel pipe 3)Determine the energy loss that will occur as 100 Liters / min of water flows from a small copper tube to a larger tube through a gradual enlargement having an included angle of 30 degrees. The small tube has a 25 mm OD x 1.5 wall thickness; the large tube has an 80 mm OD x 2.8 mm wall thickness.arrow_forward
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