8. A belt conveyor is used to deliver a fluid to a reservoir, see the figure. The depth of the fluid film on the belt is such that the velocity on the free liquid surface of the film is zero. By considering only the work done by the belt on the fluid in shear, find the efficiency of this device.

8. A belt conveyor is used to deliver a fluid to a reservoir, see the figure. The depth of the fluid film on the belt is such that the velocity on the free liquid surface of the film is zero. By considering only the work done by the belt on the fluid in shear, find the efficiency of this device.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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In the jet impact experiment, water jet impacts on a curved vane in the vertical direction. As shown in the figure below, the exit has an angle with respect to the vertical direction. The distance from the nozzle to the vane surface at the exit is h. The water volume flow rate is measured to be Q, the density of water is p, and the cross section area of the nozzle is A₁. Assume that the flow has reached the steady state. (1) Use the Bernoulli's equation to determine the velocity Vout at the exit of the vane. Assume that friction between water and the curved vane can be neglected. (2) Apply the Reynolds transport theorem to derive the expression of the impact force F, on the curved vane (neglect the jet weight). (3) Under the condition of a fixed volume flow rate Q, determine the maximum impact force Fr,max that can be obtained when the angle varies (e.g. in different vane designs). Va out 9 Ao Vout h
AT. 2] a water pump is to be used in a water supply system as shown in the figure. The pressure at point 1 is 70 kPaa and the pressure at point 2 is 101 kPaa. The velocity in the 60-mm pipe is 2 m/s. Find the pump power. Neglect friction, and assume no change of internal energy of the water and no heat transfer between point 1 and 2. Take the density of water at standard condition. 2 m2 10 m Pump
3. A pipe with varying cross-sectional areas is set up vertically as shown in the drawing. Water enters the pipe from the top wider end at a speed of 300 cm/s. Calculate (a) the mass flow rate of water (the amount of mass entering/exiting the piper every second) and (b) the water pressure at the bottom narrower end section of the piper. (Density of water is p = 1000 kg/m2 1.00 g/cm')) P 1.20x10 Pa 10.0 cm h=4.00 m 2.50 cm2 P= ?
a water pump is to be used in a water supply system as shown in the figure. The pressure at point 1 is 70 kPaa and the pressure at point 2 is 101 kPaa. The velocity in the 60-mm pipe is 2 m/s. Find the pump power. Neglect friction, and assume no change of internal energy of the water and no heat transfer between point 1 and 2. Take the density of water at standard condition.
2. In the system shown in figure below, a pump draws a solution of water from a storage tank through a pipe with cross sectional area 0.05ft². The velocity in the suction line is 3 ft/s (0.914 m/s). The pump discharges through a pipe with cross sectional area 0.02 ft² to an overhead tank. The end of the discharge pipe is 50 ft (15.2 m) above the level of the solution in the feed tank. Friction losses in the entire piping system are 10 ft. lbf / lb (29.9 J/Kg). What is the work done by the pump per unit mass of water? (25%) A = 0.02 50 ft A = 0.05ft² Pump 2 ft² a b
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2. A hydroelectric plant has 20 MW generator with an efficiency of 96%. The generator is coupled to a turbine having an efficiency of 80%. The total gross head on the turbine is 150 m while the head loss due to friction is 4% of the gross head. Find the volumetric flow rate of water.
The 11-Mg truck hauls the 20-Mg trailer. If the unit starts from rest on a level road with a tractive force of 15 kN between the driving wheels of the truck and the road, compute the tension Tin the horizontal drawbar and the acceleration a of the rig. 20 Mg 11 Mg Answers: T = kN a = m/s2
Fluid Mechanic Water, as seen in the figure above, is a 25° angle contractor in a piping system. With an elbow, it is directed downward in the installation with a volumetric flow of 0.025 m3 / s. Effective pressure at 1 point is measured as 2 bar. The flow is frictionless and the effects of gravity are neglected. a-)Effective pressure at point 2 b-) Elbow in place Calculate the x and y components of the force required to hold and the resultant force (pwater =1000 kg/m3, g = 9.81 m/s2)
A garden hose is connected to raise a narrower hose wherein the diameter of the bigger is twice the diameter of the narrower hose. The fluid flowing is a fresh water having an entrance velocity of 1.2 m/s and a pressure of 143 kPa find the the pressure in KPa and velocity in m/s at the exit point. Note; h or Ay = 20.0 cm (Express or round off your answer to one decimal place.) 20.0 cm Answer:
The cylindrical in the figure is filled with 31.4 m3 of water at t = 0. The radius of the tank is 1 m and its height is 10 m. There is an outlet line with a radius of 0.2 m at the bottom of the tank. a. What is the time required for half of the water in the tank to drain after the outlet line is opened?b. The flow velocity of water from the bottom of a water tank is related to the height of the water in the tank, and this relation is v² = 2gh where v: (m / s) linear flow velocity, g: gravitational acceleration (10 m / s2) and h: (m) height.