Consider the flow of oil with p= 894 kg/m³ and µ = 2.33 kg/m.sin a 40 cm diameter pipeline at an average velocity of 0.5 m/s. A300 m long section of the pipeline passes through the icy watersof a lake. Disregarding the entrance effects, determine thepumping power required to overcome the pressure losses and tomaintain the flow of oil in the pipe.

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Answered: Consider the flow of oil with p = 894…

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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A gardener is thinking of installing piping system for watering the plants in his garden located near a water reservoir. The reservoir is located at an elevation of 150 m above from the surface, as shown in figure. The diameter of pipe (cast iron) is constant equal to 15 cm and total length of pipe is 180 m. It is desirable that the exit velocity of water to the garden should not exceed 5 m/sec and water is at atmospheric pressure and temperature is 20°C. The gardener is planning to open the valve for 3 hours daily. Calculate the followings: a) How much volume of liquid can be drawn from reservoir in a day? b) How much total irreversible head loss will be occurred in the system?
A vented tanker is to be filled with fuel oil with p = 920 kg/m³ and μ = 0.045 kg/m-s from an underground reservoir using a L=25-m-long, 4-cm-diameter plastic hose with a slightly rounded entrance and two 90° smooth bends. The elevation difference between the oil level in the reservoir and the top of the tanker where the hose is discharged is 5 m. The capacity of the tanker is 18 m³ and the filling time is 30 min. Taking the kinetic energy correction factor at the hose discharge to be 1.05 and assuming an overall pump efficiency of 82 percent, determine the required power input to the pump. Tanker 18 m³ 4 cm- ✓ Lm Pump The required power input to the pump = KW
The power 325 W is required to transmit 9 x 10-3 m3/s of oil that has a head loss of 12 m. Determine the density of the oil. The density of the liquid (in kg/m3)
Water drains from a pressurized tank (50 kPa gage) through a 0.1m-diameter pipe system at a rate of 0.0371 m³/s. If the density of water is 1000 kg/m³ and the dynamic viscosity is 1.12 x 10 - 3 Ns/m², the Reynolds number would be equal to O 3312 O 25893 O 422321 O 475892
Glycerin (p = 1252 kg/m³ and µ = 0.27 kg/m·s) is flowing steadily in a rectangular shape with dimensions 3 cm×2 çm, 15-m-long pipe at an average velocity of 3.5 m/s. Determine the flow type.
In a laminar flow through a circular tube of radius of R, the velocity and temperature profiles at a cross section are given by u = u0 (1- r2/R2) and T(r) = A 1+Br2 - Cr4 where A, B and C are positive constants. Obtain a relation for the bulk fluid temperature at that cross section.
A rectangular duct made of commercial steel is used to channel air at 1 atm and 35°C at an average velocity of 7 m/s. The duct is 15 cm by 20 cm and 12 m long. Disregarding the entrance effects, determine the fan power needed to overcome the pressure losses in this section of the duct.
Glycerin at 10°C is flowing steadily through a 8-cm diameter pipe at 0.1 kg/s. What is the average velocity of the glycerin flow? What is the Reynolds number?
Water at 20°C is flowing through a horizontal nozzle at a flow rate of 0.005 m3/s. At the nozzle inlet, the diameter is 5 cm and the pressure is 200 kPag. The nozzle discharges freely to outside air. Determine the velocity of the water (in m/s) as it exits the nozzle. Assume negligible head losses through the nozzle.
Water is transported by gravity through a 10-cmdiameter 550-m-long plastic pipe with an elevation gradient of 0.01 (i.e., an elevation drop of 1 m per 100 m of pipe length). Taking ? = 1000 kg/m3 and ? = 1 × 10−6 m2/s for water, determine the flow rate of water through the pipe. If the pipe were horizontal, what would the power requirements be to maintain the same flow rate?
A 2.4-m-diameter tank is initially filled with water 4 m above the center of a sharp-edged 10-cm-diameter orifice. The tank water surface is open to the atmosphere, and the orifice drains to the atmosphere. Neglecting the effect of the kinetic energy correction factor, calculate (a) the initial velocity from the tank and (b) the time required to empty the tank. Does the loss coefficient of the orifice cause a significant increase in the draining time of the tank?

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