Fluid Mechanics Fundamentals And Applications
3rd Edition
ISBN: 9780073380322
Author: Yunus Cengel, John Cimbala
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 8, Problem 42P
Repeat Prob. 8-39 for tribulent flow in smooth pipes for which the friction factor is given as f = 0.184Re-0.2.
What would your answer be for fully turbulent flow in a tough pipe?
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Chapter 8 Solutions
Fluid Mechanics Fundamentals And Applications
Ch. 8 - Consider the flow of air and wale in pipes of the...Ch. 8 - Consider laminar flow in a circular pipe. Is the...Ch. 8 - What is hydraulic diameter? How is it defined?...Ch. 8 - How is the hydrodynamic entry length defined for...Ch. 8 - Why are liquids usually transported in circular...Ch. 8 - What is the physical significance of the Reynolds...Ch. 8 - Consider a person walking first in air and then in...Ch. 8 - Show that the Reynolds number for flow in a...Ch. 8 - Which fluid at room temperature requires a larger...Ch. 8 - What is the eneia1Iy accepted value of the...
Ch. 8 - How does surface roughness affect the pressure...Ch. 8 - Shown here is a cool picture of water being...Ch. 8 - Someone claims that the volume flow rate in a...Ch. 8 - Someone claims that the average velocity in a...Ch. 8 - Someone claims that the shear stress at the center...Ch. 8 - Someone claims that in fully developed turbulent...Ch. 8 - How does the wall shear stress w , vary along the...Ch. 8 - What fluid property is responsible for the...Ch. 8 - In the fully developed region of flow in a...Ch. 8 - How is the friction factor for flow in a pipe...Ch. 8 - Discuss whether fully developed pipe flow is one-,...Ch. 8 - Consider fully developed flow in a circular pipe...Ch. 8 - Consider fully developed laminar how in a...Ch. 8 - Explain why the friction factor is independent of...Ch. 8 - What is turbulent viscosity? What caused it?Ch. 8 - The head toss for a certain circular pipe is given...Ch. 8 - Consider fully developed laminar flow in a...Ch. 8 - How is head loss related to pressure loss? For a...Ch. 8 - Consider laminar flow of air in a circular pipe...Ch. 8 - What is the physical mechanism that causes the...Ch. 8 - The velocity profile for the fully developed...Ch. 8 - Prob. 32PCh. 8 - Water at 10°C ( =999.7kg/m3 and =1.307103kg/ms )...Ch. 8 - Consider an air solar collector that is 1 m wide...Ch. 8 - Heated air at 1 atm and 100F is to be transported...Ch. 8 - In fully developed laminar flow in a circular...Ch. 8 - The velocity profile in fully developed laminar...Ch. 8 - Repeat Prob. 8-36 for a pipe of inner radius 7 cm.Ch. 8 - Water at 15°C (p = 999.1 kg/m3 and = 1.138 × 10-3...Ch. 8 - Prob. 40PCh. 8 - Consider laminar flow of a fluid through a square...Ch. 8 - Repeat Prob. 8-39 for tribulent flow in smooth...Ch. 8 - Prob. 43PCh. 8 - Water at 70F passes through...Ch. 8 - Oil with p = 876 kg/m3 and = 0.24 kg/m.s is...Ch. 8 - Glycenii at 40 C with p = l22 kg/m3 and = 0.27...Ch. 8 - Air at 1 atm and 60 F is flowing through a 1 ft ×...Ch. 8 - Water enters into a cone of height H and base...Ch. 8 - The velocity profile for incompressible turbulent...Ch. 8 - Oil with a density of 850 kg/m3 and kinematic...Ch. 8 - In an air heating system, heated air at 40 C and...Ch. 8 - Glycerin at 40 C with p = 1252 kg/m3 and = 0.27...Ch. 8 - Oil at 80°F ( =56.8lbm/ft3 and =0.0278lbm/fts ) is...Ch. 8 - Liquid ammonia at 20 C is flowing through a...Ch. 8 - During a retrofitting project of a fluid flow...Ch. 8 - Define equivalent length for minor loss in pipe...Ch. 8 - The effect of rounding of a pipe inlet on the loss...Ch. 8 - The effect of rounding of a pipe exit on the loss...Ch. 8 - Which has a greater minor loss coefficient during...Ch. 8 - A piping system involves sharp turns, and thus...Ch. 8 - What is minor loss in pipe flow? How is the minor...Ch. 8 - Water is to be withdrawn from an 8-m-high water...Ch. 8 - Consider flow from a water reservoir through a...Ch. 8 - Repeat Prob. 8-62 for a slightly rounded entrance...Ch. 8 - A horizontal pipe has an abrupt expansion from...Ch. 8 - Water is pumped from a large lower reservoir to a...Ch. 8 - A piping system equipped with a pump is operating...Ch. 8 - Prob. 69CPCh. 8 - Consider two identical 2-m-high open tanks tilled...Ch. 8 - A piping system involves two pipes of different...Ch. 8 - A piping system involves two pipes of different...Ch. 8 - A piping system involves two pipes of identical...Ch. 8 - For a piping system, define the system curve, the...Ch. 8 - A 4-in-high cylindrical tank having a...Ch. 8 - Prob. 76PCh. 8 - The water needs of a small farm are to be met by...Ch. 8 - Prob. 78EPCh. 8 - A 2.4-m-diameter tank is initially filled with...Ch. 8 - A 3-m-diameter tank is initially filled with water...Ch. 8 - Reconsider Prob. 8-78. In order to drain the tank...Ch. 8 - Water to a residential area is transported at a...Ch. 8 - Prob. 83EPCh. 8 - Oil at 20 C is flowing through a vertical glass...Ch. 8 - Prob. 85PCh. 8 - Water at 15 C is drained from a large reservoir...Ch. 8 - A fanner is to pump water at 70 F from a river to...Ch. 8 - A water tank tilled with solar-heated vater at 4OC...Ch. 8 - Two water reservoirs A and B are connected to each...Ch. 8 - Prob. 91PCh. 8 - Prob. 92PCh. 8 - A certain pail of cast iron piping of a water...Ch. 8 - Repeat Prob. 8-91 assuming pipe A has a...Ch. 8 - Prob. 95PCh. 8 - Repeat Prob. 8-93 for cast lion pipes of the same...Ch. 8 - Water is transported by gravity through a...Ch. 8 - Water to a residential area is transported at a...Ch. 8 - Prob. 99PCh. 8 - Prob. 101PCh. 8 - A 6-m-tall chimney shown in Fig. P8103 is to be...Ch. 8 - Prob. 104PCh. 8 - Prob. 105CPCh. 8 - What is the difference between laser Doppler...Ch. 8 - What are the primary considerations when selecting...Ch. 8 - Prob. 108CPCh. 8 - Explain how flow rate is measured with...Ch. 8 - Prob. 110CPCh. 8 - Prob. 111CPCh. 8 - Prob. 112CPCh. 8 - The flow rate of water at 20°C (=998kg/m3) and...Ch. 8 - Prob. 114PCh. 8 - Prob. 115PCh. 8 - Prob. 116PCh. 8 - Prob. 117PCh. 8 - Prob. 118EPCh. 8 - Prob. 119EPCh. 8 - Prob. 120PCh. 8 - A Venturi meter equipped with a differential...Ch. 8 - Prob. 123PCh. 8 - Prob. 124PCh. 8 - Prob. 125PCh. 8 - Prob. 126EPCh. 8 - A 22-L kerosene tank (=820kg/m3) is filled with a...Ch. 8 - The flow rate of water at 20°C (p = 998 kg/m3 and ...Ch. 8 - Prob. 129PCh. 8 - Prob. 130PCh. 8 - The conical container with a thin horizontal tube...Ch. 8 - Shell-and-tube heat exchangers with hundred of...Ch. 8 - The compressed air requirements of a manufacturing...Ch. 8 - A house built on a riverside is to be cooled iii...Ch. 8 - The velocity profile in fully developed lamina,...Ch. 8 - Prob. 136EPCh. 8 - Repeat Prob. 8—136E assuming the pipe is inclined...Ch. 8 - Prob. 138PCh. 8 - Consider flow front a reservoir through a...Ch. 8 - Prob. 140PCh. 8 - A student is to determine the kinematic viscosity...Ch. 8 - A circular water pipe has an abrupt expansion from...Ch. 8 - Prob. 143PCh. 8 - Water at 15 C is to be dischaged froiti a...Ch. 8 - Two pipes of identical diameter and material are...Ch. 8 - A pipelme ihat Eransports oil ai 4OC at a iate of...Ch. 8 - Repeat Prob. 8-140 for hot-water flow of a...Ch. 8 - Prob. 149PCh. 8 - Prob. 152EPCh. 8 - Prob. 153EPCh. 8 - In a hydroelectric power plant. water at 20°C is...Ch. 8 - Prob. 155PCh. 8 - The water at 20 C in a l0-m-diameter, 2-m-high...Ch. 8 - Prob. 162PCh. 8 - Prob. 163PCh. 8 - Prob. 164PCh. 8 - Prob. 165PCh. 8 - Prob. 166PCh. 8 - Air at 1 atm and 20C flows in a 4-em-diameter...Ch. 8 - Consider laminar flow of water in a...Ch. 8 - Consider laminar flow of water at 15C in a...Ch. 8 - Engine oil at 40C(=876kg/m3,=0.2177kg/m.s) flows...Ch. 8 - A fluid flows in a 25-cm-diameter pipe at a...Ch. 8 - Watet flows in a I 5-cm-diameter pipe a, a...Ch. 8 - The pressure drop for a given flow is determined...Ch. 8 - Air at 1 atm and 25C(v=1.562X105m2/s) flows in a...Ch. 8 - Consider air flow in a 10-cm-diameter high...Ch. 8 - Air at 1 aim and 40 C flows in a 8-cm-diameter...Ch. 8 - Water at 10C(=999.7kg/m3,=1.307x103kg/m.s) is to...Ch. 8 - The valve in a piping system causes a 3.1 m head...Ch. 8 - Consider a sharp-edged pipe exit for fully...Ch. 8 - A water flow system involves a 180 return bend...Ch. 8 - A constant-diameter piping system involves...Ch. 8 - Air flows in an 8-cm-diameter, 33-m-long pipe at a...Ch. 8 - Consider a pipe that branches out into two...Ch. 8 - Prob. 184PCh. 8 - Prob. 185PCh. 8 - Prob. 186PCh. 8 - Prob. 187PCh. 8 - Design an experiment to measure the viscosity of...Ch. 8 - During a camping trip you notice that water is...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Heated air at 1 atm and 100°F is to be transported in a 900-ft-long circular section plastic duct at a rate of 1.4 lb/s. I want to determine the head loss and pumping power at the three diameter values in the table below. Complete the table to help me choose a wise diameter. Why would a good design not only focus on minimizing the pumping power? Diameter Head loss, hi Pumping power, W Reynolds number, Re n.d. f n.d. (in) ft hp 8 12 16arrow_forwardPlease quicklyarrow_forward- EXAMPLE 8-1 Laminar Flow in Horizontal and Inclined Pipes Consider the fully developed flow of glycerin at 40°C through a 70-m-long, 4-cm-diameter, horizontal, circular pipe. If the flow velocity at the centerline is measured to be 6 m/s, determine the velocity profile and the pressure dif- ference across this 70-m-long section of the pipe, and the useful pumping power required to maintain this flow. For the same useful pumping power input, determine the percent increase of the flow rate if the pipe is inclined 15° downward and the percent decrease if it is inclined 15° upward. The pump is located outside this pipe section. D-2 em 6 m/s Glycerine Hello sir, I want the same solution, but in a simplified way without the words of simplifying the solution. ur) - u I- Substituting, the velocity profile is determined to be u(r) - (6 m/s)1- - 6(1-2500r) (0.02 m) where u is in m/s and r is in m. The average velocity, the flow rate, and the Reynolds number are 6 m/s V - Vs - 3 m/s V - VvA-…arrow_forward
- - EXAMPLE 8-1 Laminar Flow in Horizontal and Inclined Pipes Consider the fully developed flow of glycerin at 40°C through a 70-m-long, 4-cm-diameter, horizontal, circular pipe. If the flow velocity at the centerline is measured to be 6 m/s, determine the velocity profile and the pressure dif- ference across this 70-m-long section of the pipe, and the useful pumping power required to maintain this flow. For the same useful pumping power input, determine the percent increase of the flow rate if the pipe is inclined 15° downward and the percent decrease if it is inclined 15° upward. The pump is located outside this pipe section. D-2 em 6 m/s Glycerine Hello sir, I want the same solution, but in a simplified way without the words of simplifying the solution. ur) - uma 1- Substituting, the velocity profile is determined to be ur) - (6 m/s)I - - 6(1 - 2500r) (0.02 m) where u is in m/s and r is in m. The average velocity, the flow rate, and the Reynolds number are V - Vavs 4max 6 m/s - 3 m/s…arrow_forwardQuestion 2 How is the hydrodynamic entry length defined for flow in a pipe? Is the entry length longer in laminar or turbulent flow? Explainarrow_forwardWater at 15°C is flowing through a 10 cm cast iron pipe (ɛ=0.26 mm) at 1 L/s. The friction coefficient O a. Is a function of Reynolds number alone b. Is a function of relative roughness alone O c. Is a function of Reynolds number and relative roughness O d. Is independent of the roughness coefficientarrow_forward
- For these velocity distributions in a round pipe, indicate whether the kinetic-energy correction factor ∝ is greater than, equal to, or less than unity.arrow_forwardflow in a straight circular pipe, as shown in the aw in a straight circular pipe, as shown in the The velocity profile of a fully developed laminar figure, is given by the expression R? ( ap 72 ur) = %3D 4u ( dx R2 dp is a constant where The average velocity of fluid in the pipe is R u(r)arrow_forwardslove this fluid problemarrow_forward
- Engine oil at 20°C flows in a 15-cm-diameter pipe at a rate of 800 L/min. The friction factor for this flow is (a) 0.746 (b) 0.533 (c) 0.115 (d) 0.0826 (e) 0.0553arrow_forwardRequired Information Water at 10°C (p = 999.7 kg/m³ and u=1.307 x 103 kg/m-s) is flowing steadily in a 0.12- cm-diameter, 19-m-long pipe at an average velocity of 0.9 m/s. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Determine the pressure drop. (You must provide an answer before moving on to the next part.) The pressure drop is 128.77 kPa.arrow_forwardAnswer with complete solutions.arrow_forward
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