Fluid Mechanics: Fundamentals and Applications
4th Edition
ISBN: 9781259696534
Author: Yunus A. Cengel Dr., John M. Cimbala
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Videos
Question
Chapter 11, Problem 64EP
To determine
The drag force exerted on the pipe by the river.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Engine oil at 60 °C flows over the upper surface of a 5 m long flat plate which
temperature is 20 °C with a velocity of 2 m/s. Determine the total drag force and the
rate of heat transfer per unit width of the entire plate. Given width for the plate is 1 m.
Given the next scenario; Justify the value of x (m²/s) to get the turbulent flow for the
new total drag force and the rate of heat transfer per unit width of the plate. Discuss
your idea.
A submarine can be treated as an ellipsoid with a diameter of 5 m and a length of
25 m. The submarine is cruising horizontally and steadily at 65 km/h in seawater
(p = 1025 kg/m³.p = 0.00108 Ns/m2).
Determine:
The Reynolds number for the submarine and state whether the flow is in the
laminar or turbulent regime.
ii.
The drag force on the submarine.
iii.
The power required to overcome the drag force.
To surface, a total lift force of 1000 kN is required from a pair of
NACA 0012 hydroplanes. Each hydroplane has a chord length of 1 m and a
iv.
span of 3 m. What angle of attack should be used?
5. The local atmospheric pressure in Denver, Colorado (elevation 1610 m) is 83.4 kPa. Air at this pressure
and at 25°C flows with a velocity of 9 m/s over a 2.5-m x 5-m flat plate. Determine the drag force acting
on the top surface of the plate if the air flows parallel to the (a) 5-m-long side and (b) the 2.5-m-long
side.
Chapter 11 Solutions
Fluid Mechanics: Fundamentals and Applications
Ch. 11 - What is drag? What causes it? Why do we usually...Ch. 11 - Prob. 2CPCh. 11 - Which bicyclist is more likely to go faster: one...Ch. 11 - Prob. 4CPCh. 11 - Define the frontal area of a body subjected to...Ch. 11 - Define the planform area of a body subjected to...Ch. 11 - Prob. 7CPCh. 11 - What is the difference between streamlined and...Ch. 11 - Prob. 9CPCh. 11 - During flow over a given body, the drag force, the...
Ch. 11 - During flow over a given slender body such as a...Ch. 11 - What is terminal velocity? How is it determined?Ch. 11 - What is the difference between skin friction drag...Ch. 11 - What is the effect of surface roughness on the...Ch. 11 - Prob. 15CPCh. 11 - What is flow separation? What causes it? What is...Ch. 11 - Prob. 17CPCh. 11 - Consider laminar flow over a flat plate. How does...Ch. 11 - In general, how does the drag coefficient vary...Ch. 11 - Fairings are attached to the front and back of a...Ch. 11 - Prob. 21PCh. 11 - The resultant of the pressure and wall shear...Ch. 11 - Prob. 23PCh. 11 - Prob. 24PCh. 11 - To reduce the drag coefficient and thus to improve...Ch. 11 - A circular sign has a diameter of 50 cm and is...Ch. 11 - Prob. 28PCh. 11 - Prob. 29PCh. 11 - At highway speeds, about half of the power...Ch. 11 - A submarine can be treated as an ellipsoid with a...Ch. 11 - A 70-kg bicyclist is riding her 1 5-kg bicycle...Ch. 11 - A wind turbine with two or four hollow...Ch. 11 - During steady motion of a vehicle on a level road,...Ch. 11 - Prob. 37EPCh. 11 - A 0.80-m-diameter, 1 .2-rn-high garbage can is...Ch. 11 - An 8-mm-diameter plastic sphere whose density is...Ch. 11 - Prob. 40PCh. 11 - The drag coefficient of a vehicle increases when...Ch. 11 - To reduce the drag coefficient and thus to improve...Ch. 11 - During major windstorms, high vehicles such as RVs...Ch. 11 - What does the friction coefficient represent in...Ch. 11 - What fluid property is responsible for the...Ch. 11 - How is the average friction coefficient determined...Ch. 11 - Prob. 47EPCh. 11 - The local atmospheric pressure in Denver, Colorado...Ch. 11 - Prob. 50PCh. 11 - Prob. 51EPCh. 11 - Air at 25C and 1 atm is flowing over a long flat...Ch. 11 - Prob. 54PCh. 11 - During a winter day, wind at 70 km/h, 5C , and I...Ch. 11 - Prob. 56PCh. 11 - The forming section of a plastics plant puts out a...Ch. 11 - Prob. 58CPCh. 11 - Why is flow separation in flow over cylinders...Ch. 11 - Prob. 60CPCh. 11 - A 5-mm-diameter electrical transmission line is...Ch. 11 - A 1ong 5-cm-diameter steam pipe passes through...Ch. 11 - Consider 0.8-cm-diameter hail that is falling...Ch. 11 - Prob. 64EPCh. 11 - Prob. 65PCh. 11 - Prob. 66PCh. 11 - Prob. 67EPCh. 11 - One of the popular demonstrations in science...Ch. 11 - Prob. 69PCh. 11 - What is stall? What causes an airfoil to stall?...Ch. 11 - Prob. 71CPCh. 11 - Air is flowing past a symmetrical airfoil at zero...Ch. 11 - Both the lift and the drag of an airfoil increase...Ch. 11 - Prob. 74CPCh. 11 - Prob. 75CPCh. 11 - Air is flowing past a symmetrical airfoil at an...Ch. 11 - Prob. 77CPCh. 11 - Prob. 78CPCh. 11 - Prob. 79CPCh. 11 - Prob. 80CPCh. 11 - How do flaps affect the lift and the drag of...Ch. 11 - Prob. 82EPCh. 11 - Consider an aircraft that takes off at 260 km/h...Ch. 11 - Prob. 84PCh. 11 - Prob. 85PCh. 11 - A tennis ball with a mass of 57 and a diameter of...Ch. 11 - A small aircraft has a wing area of 40 m2, a lift...Ch. 11 - Prob. 89PCh. 11 - Consider a light plane that has a total weight of...Ch. 11 - A small airplane has a total mass of 1800 kg and a...Ch. 11 - An airplane has a mass of 48.000 k. a wins area of...Ch. 11 - Prob. 93EPCh. 11 - Prob. 94PCh. 11 - Prob. 95EPCh. 11 - A 2-zn-high, 4-zn-wide rectangular advertisement...Ch. 11 - 11-97 A plastic boat whose bottom surface can be...Ch. 11 - Prob. 99PCh. 11 - Prob. 100EPCh. 11 - A commercial airplane has a total mass of 150.000...Ch. 11 - Prob. 102PCh. 11 - Prob. 103PCh. 11 - Prob. 104PCh. 11 - Prob. 105PCh. 11 - Prob. 107PCh. 11 - Prob. 108PCh. 11 - Prob. 109PCh. 11 - Prob. 110PCh. 11 - Prob. 111PCh. 11 - Prob. 113PCh. 11 - Prob. 115PCh. 11 - Prob. 116PCh. 11 - Prob. 117PCh. 11 - Prob. 118PCh. 11 - Prob. 119PCh. 11 - The region of flow trailing the body where the...Ch. 11 - Prob. 121PCh. 11 - Prob. 122PCh. 11 - Prob. 123PCh. 11 - Prob. 124PCh. 11 - Prob. 125PCh. 11 - Prob. 126PCh. 11 - An airplane has a total mass of 3.000kg and a wing...Ch. 11 - Prob. 128PCh. 11 - Write a report on the history of the reduction of...Ch. 11 - Write a report oil the flips used at the leading...Ch. 11 - Discuss how to calculate drag force a unsteady...Ch. 11 - Large commercial airplanes cruise at high...Ch. 11 - Many drivers turn off their air conditioners and...Ch. 11 - Consider the boundary layer growing on a flat...
Knowledge Booster
Learn more about
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
- The drag coefficient for the car is CD�� = 0.28, and the projected area into the 20∘C∘C airstream is 2.5 m2m2. At this temperature ρa�� = 1.202 kg/m3kg/m3. (Figure 1)Determine the power the engine must supply to maintain a constant speed of V� = 160 km/hkm/h .arrow_forwardThe 1.5-in (0.125-ft) gap between two large plane surfaces is filled with SAE-30 oil at 80 °F (μ=0.0063 lb.s/ft2). What force is required to drag a very thin plate of 5-ft2 area between the surfaces at a speed of 0.5 ft/s if this plate is equally spaced between the two surfaces.arrow_forwardThe jet plane in Fig. 6–19a is in level flight with a constant speed of 140 m/s. Each of its two turbojet engines burns fuel at a rate of 3 kg/s. Air, at a temperature of 15°C, enters the intake, which has a cross- sectional area of 0.15 m². If the exhaust has a velocity of 700 m/s, mea- sured relative to the plane, determine the drag acting on the plane. W 140 m/s FD O O O OO O O Oo O (a) (b)arrow_forward
- Throughout, take the acceleration due to gravity to be 10 m/s? and water to have density of 1000 kg/m³. Question 1 A large block of mass 1100 kg is towed at a constant speed UB up an inclined plane at 6° to the horizontal, as shown in Fig. 1. The towing force applied on the block has magnitude 1165 N. The block slides over an oil film with a constant thickness of 3 mm. The oil has density 900 kg/m and dynamic viscosity 0.1 Pa.s. The area of the block in contact with the oil is 15 m2. UB F=1165 N m=1100 kg oil film 3 mm contact area: 15 m² 6° Figure 1 (i) Sketch, with appropriate labels, the forces acting on the block in the direction parallel to the inclined plane. (ii) Determine the magnitude of the drag force acting on the bottom surface of the block. (iii) Assuming a laminar velocity profile in the oil film, determine the speed of the block Ug. (iv) Verify that the flow of oil is laminar as assumed in (iii). (v) Determine the power requirement to tow the block. (vi) To reduce the…arrow_forwardA 3m - long snow plow attached to the truck is shown on the road he cleans the snow. Snow thickness is 30 cm and snow density is 200 kg / m has been given. The truck is travelling at 54 km / h and is driven by a snow plow 60° angle with the bed in the direction of the truck's movement as shown is divided. Calculate the force required to push the snow shovel. Abdomen it is accepted that it acts as a fluid. V = 54 km / li 6 0 d = 30 cm 1otfen ti se 20 N 0.714arrow_forwardA 7-ft-diameter spherical tank completely submerged in freshwater is being towed by a ship at 8 ft/s. Assuming turbulent flow, determine the required towing power.arrow_forward
- A submarine can be treated as an ellipsoid with a diameter of 5 m and a length of 25 m. Determine the power required for this submarine to cruise horizontally and steadily at 40 km/h in seawater whose density is 1025 kg/m3. Also determine the power required to tow this submarine in air whose density is 1.30 kg/m3. Assume the flow is turbulent in both cases.arrow_forwardAft of the transition point between laminar and turbulent flow A. the boundary layer gets thinner and the speed increases B. the boundary layer thickens and the speed decreases C. the mean speed increases and the surface friction increases D. the mean speed increases and the surface friction decreasesarrow_forwardQuestion B3 – External Flow The rectangular wings of a microlight aircraft have a combined spanwise length of 9.144 m and streamwise (direction of air flow) width of 0.9144 m The wings have a coefficient of form drag of 0.01 and a lift coefficient of 0.3 in cruise. When cruising at a speed of 15Okm/h and altitude of 3,000 feet, the temperature and absolute pressure of the atmospheric air are 5°C and 90 kPa, respectively. a) Calculate the density of the air at cruising altitude. b) Calculate the form drag on the wings. c) Calculate the Reynolds number of the wings.arrow_forward
- A flat plate ( 1.5 m ) long and ( 1.5 m ) wide is towed in water ( ρ = 1000 kg/m3 and ν=1.31 * 10 -6 m2 / s ) in the direction of its length at a speed of ( 20 cm / s ). Determine; a) The skin frictional drag force on both sides of the plate. b) The boundary layer thickness at the end of the plate.arrow_forwardThe friction coefficient for a boundary layer is given by the expression: Cf= If the average flow velocity increases from an original state to a new state by a factor of 4.66, calculate the ratio of the Cf over its value at the original state. 1.32 √Rexarrow_forwardAir flows at 10 m/s past a smooth rectangular flat plate 0.3m wide and 3m long. Assuming that the turbulence level in the oncoming stream is low and that transition occurs at Re- 5*105, calculate the ratio of total drag when the flow is parallel to the length of the plate to the value when the flow is parallel to the width take density 1.24 kg/m3 and v-0.15stoke.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University Press
Mechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSON
Thermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEY
Mechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage Learning
Engineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY
Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY
Intro to Compressible Flows — Lesson 1; Author: Ansys Learning;https://www.youtube.com/watch?v=OgR6j8TzA5Y;License: Standard Youtube License