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
Concept explainers
Videos
Textbook Question
Chapter 6, Problem 103P
Consider water flow through a horizontal. short garden hose at a rate of 30 kg/min. The velocity at the inlet is 1m /s and that at the outlet is 11.5 m/s. The hose makes a 1800 turn before the water is discharged. Disregard the weight of the hose and water. Taking the momentum-flux correction factor to be 1.03 at both the inlet and the outlet. the anchoring force required to hold the hose iii place is
(a)7.6N
(b)28.4N
(c) l6.6N
(1)34.1 N
(e) 11.9 N
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
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.
(b) A 90° elbow in a horizontal pipe is used to direct water flow upward at a rate of 40 kg/s,
as shown in the Figure 2. The diameter of the entire elbow is 10 cm. The elbow discharges
water into the atmosphere, and thus the pressure at the exit is the local atmospheric
pressure. The elevation difference between the centres of the exit and the inlet of the elbow
is 50 cm. The weight of the elbow and the water in it is considered to be negligible.
i)
Draw an appropriate control volume for the flow and state all your assumptions
clearly.
ii)
Determine the gage pressure at the centre of the inlet of the elbow
iii)
Determine the anchoring force needed to hold the elbow in place
50 cm
Water
40 kg/s
Figure 2
An open reservoir on ground level is used to store
water to be pumped up to an overhead tank (also
open) 200 ft ave ground. Calculate the work done
by the pump (in J/kg) to give an exit velocity of 40
m/s. Ignore friction and use alpha = 1.00.
Evaluate the pressure term Evaluate he kinetic
energy term Evaluate the potential energy term
Hence calculate the work done by the pump What
minimum power of pump (in KW) would be
needed to provide a mass flowrate of 0.27 kg/s
Training
Chapter 6 Solutions
Fluid Mechanics: Fundamentals and Applications
Ch. 6 - Express Newton’s second law of motion for rotating...Ch. 6 - Express Newton’s first, second, and third laws.Ch. 6 - Is momentum a vector? If so, in what direction...Ch. 6 - Express the conservation of momentum principle....Ch. 6 - How do surface forces arise in the momentum...Ch. 6 - Explain the importance of the Reynolds transport...Ch. 6 - What is the importance of the momentum-flux...Ch. 6 - Write the momentum equation for steady...Ch. 6 - In the application of the momentum equation,...Ch. 6 - Two firefighters are fighting a fire with...
Ch. 6 - A rocket in space (no friction or resistance to...Ch. 6 - Describe in terms of momentum and airflow how a...Ch. 6 - Does it take more, equal, or less power for a...Ch. 6 - In a given location, would a helicopter require...Ch. 6 - Describe body forces and surface forces, and...Ch. 6 - A constant-velocity horizontal water jet from a...Ch. 6 - A horizontal water jet of constant velocity V from...Ch. 6 - A horizontal water jet from a nozzle of constant...Ch. 6 - A 2.5-cm-diameter horizontal water jet with a...Ch. 6 - A 90 elbow in a horizontal pipe is used to direct...Ch. 6 - Repeat Prob. 6-20 for the case of another...Ch. 6 - A horizontal water jet impinges against a vertical...Ch. 6 - Water enters a 7-cm-diameter pipe steadily with a...Ch. 6 - A reducing elbow in a horizontal pipe is used to...Ch. 6 - Repeat Prob. 6-24 for the case of = 125°.Ch. 6 - A 100-ft3/s water jet is moving in the positive...Ch. 6 - Reconsider Prob. 6-26E. Using appropriate...Ch. 6 - Commercially available large wind turbines have...Ch. 6 - A fan with 24-in-diameter blades moves 2000 cfm...Ch. 6 - A 3-in-diameter horizontal jet of water, with...Ch. 6 - Firefighters are holding a nozzle at the end of a...Ch. 6 - A 5-cm-diameter horizontal jet of water with a...Ch. 6 - Prob. 33PCh. 6 - A 3-in-diameter horizontal water jet having a...Ch. 6 - An unloaded helicopter of mass 12,000 kg hovers at...Ch. 6 - Prob. 36PCh. 6 - Water is flowing through a 10-cm-diameter water...Ch. 6 - Water flowing in a horizontal 25-cm-diameter pipe...Ch. 6 - Prob. 39PCh. 6 - Water enters a centrifugal pump axially at...Ch. 6 - An incompressible fluid of density and viscosity ...Ch. 6 - Consider the curved duct of Prob. 6-41, except...Ch. 6 - As a follow-up to Prob. 6-41, it turns out that...Ch. 6 - Prob. 44PCh. 6 - The weight of a water tank open to the atmosphere...Ch. 6 - A sluice gate, which controls flow rate in a...Ch. 6 - A room is to be ventilated using a centrifugal...Ch. 6 - How is the angular momentum equation obtained from...Ch. 6 - Prob. 49CPCh. 6 - Prob. 50CPCh. 6 - Prob. 51CPCh. 6 - A large lawn sprinkler with two identical arms is...Ch. 6 - Prob. 53EPCh. 6 - The impeller of a centrifugal pump has inner and...Ch. 6 - Water is flowing through a 15-cm-diameter pipe...Ch. 6 - Prob. 56PCh. 6 - Repeat Prob. 6-56 for a water flow rate of 60 L/s.Ch. 6 - Prob. 58PCh. 6 - Water enters the impeller of a centrifugal pump...Ch. 6 - A lawn sprinkler with three identical antis is...Ch. 6 - Prob. 62PCh. 6 - The impeller of a centrifugal blower has a radius...Ch. 6 - An 8-cm-diameter horizontal water jet having a...Ch. 6 - Water flowing steadily at a rate of 0.16 m3/s is...Ch. 6 - Repeat Prob. 6-66 by taking into consideration the...Ch. 6 - A 16-cm diameter horizontal water jet with a speed...Ch. 6 - Water enters vertically and steadily at a rate of...Ch. 6 - Repeal Prob. 6-69 for the case of unequal anus-the...Ch. 6 - Prob. 71PCh. 6 - Prob. 72PCh. 6 - A spacecraft cruising in space at a constant...Ch. 6 - A 60-kg ice skater is standing on ice with ice...Ch. 6 - A 5-cm-diameter horizontal jet of water, with...Ch. 6 - Water is flowing into and discharging from a pipe...Ch. 6 - Indiana Jones needs So ascend a 10-m-high...Ch. 6 - Prob. 79EPCh. 6 - A walnut with a mass of 50 g requires a force of...Ch. 6 - Prob. 81PCh. 6 - Prob. 82PCh. 6 - A horizontal water jet of constant velocity V...Ch. 6 - Show that the force exerted by a liquid jet on a...Ch. 6 - Prob. 85PCh. 6 - Prob. 86PCh. 6 - Water enters a mixed flow pump axially at a rate...Ch. 6 - Prob. 88PCh. 6 - Water enters a two-armed lawn sprinkler along the...Ch. 6 - Prob. 91PCh. 6 - Prob. 92PCh. 6 - Prob. 93PCh. 6 - Prob. 94PCh. 6 - A water jet strikes a moving plate at velocity...Ch. 6 - Water flows at mass flow rate m through a 90°...Ch. 6 - Prob. 97PCh. 6 - Water shoots out of a Iar2e tank sitting a cart...Ch. 6 - Prob. 99PCh. 6 - Prob. 100PCh. 6 - Prob. 101PCh. 6 - Consider water flow through a horizontal, short...Ch. 6 - Consider water flow through a horizontal. short...Ch. 6 - Prob. 104PCh. 6 - Prob. 105PCh. 6 - Prob. 106PCh. 6 - The velocity of wind at a wind turbine is measured...Ch. 6 - The ve1ocity of wind at a wind turbine is measured...Ch. 6 - Prob. 109PCh. 6 - Prob. 110PCh. 6 - Prob. 111PCh. 6 - Consider the impeller of a centrifugal pump with a...Ch. 6 - Prob. 113PCh. 6 - Prob. 114P
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 pipe elbow below discharges water at rate of SN/100 (m3/s) into the atmosphere at section 2. The total volume of the passage between sections 1 and 2 is equal to 0.2 m3 and the total mass of the elbow material between sections 1 and 2 is equal to 10 x SN (kg). Neglect any friction losses. Calculate the horizontal and vertical forces acting on the elbow. Also, calculate the resultant force and angle of force on the elbow. ****SN=21arrow_forwardThe force that drives the flow of fluids is the pressure difference; a pump works by raising thepressure of a fluid (converting it into mechanical work of its axis and energy of flow). It is determined thatA gasoline pump consumes 3.8 KW of electrical power when it is working. If the difference ofpressures between pump discharge and suction is 7 KPa, and the changes in speed and head aredespicable.Determine the maximum possible volumetric flow rate of the gasoline. (see img)arrow_forwardCalculate the resultant force required in kN to hold a 90° elbow in place when attached to DN 150 Schedule 40 pipes carrying water at 0.1768 m3/s and 1 050 kPa. Neglect energy lost in the elbow. Do not include direction for the final answer! NB: Assume a water density of 1000 kg/m3 and use appropriate appendix to obtain necessary data. Hint: Draw a diagram showing the pipe system with the bent at the bottom right corner, water flowing from left to right then up to help you analyse the problem. Sign Conversion: North (+) and West (+)arrow_forward
- A horizontal water jet with a flow rate of V. and crosssectional area of A drives a covered cart of mass mc along a level and nearly frictionless path. The jet enters a hole at the rear of the cart and all water that enters the cart is retained, increasing the system mass. The relative velocity between the jet of constant velocity VJ and the cart of variable velocity V is VJ − V. If the cart is initially empty and stationary when the jet action is initiated, develop a relation (integral form is acceptable) for cart velocity versus time.arrow_forwardWater enters the impeller of a centrifugal pump radially at a rate of 45 cfm (cubic feet per minute) when the shaft is rotating at 500 rpm. The tangential component of absolute velocity of water at the exit of the 2-ft outer diameter impeller is 110 ft/s. Determine the torque applied to the impeller and the minimum power input to the pumparrow_forwardWater leaves a hose at a rate of 3.6-kg per 2.0-s with a speed of 19.3-m/s and is aimed at a toy car at the exact moment the car is hit the water slows down to 4.0-m/s (That is, we ignore any splashing back.) What is the force exerted by the water on the toy car?arrow_forward
- A reducing bend with an inlet diameter of 200 mm and exit diameter of 150 mm bends 40 degreesupwards. The water velocity and corresponding pressure at the inlet to the band is 4, 5 m/s and 70 kParespectively. Determine the weight flow, the water flow velocity at the exit to the bend, the bend exitpressure if the friction head loss through the bend section is 2 m and the magnitude and direction ofthe resultant force flowing through the bend.arrow_forwardA jet of 50mm diameter impinges on a curved vane and is deflected through an angle of 175 degree. The vane moves in the same direction as that of jet with a velocity of 35m/s. if the rate of flow is 170 L/s, determine the component of force on the vane in the direction of motion. How much would be the power developed by the vane and what would be the water efficiency? Neglect friction.arrow_forwardAir flows steadily at low speed through a horizontal nozzle (by definition a device for accelerating a flow), discharging to atmosphere. The area at the nozzle inlet is 0.1 m2. At the nozzle exit, the area is 0.02 m2. Determine the gage pressure required at the nozzle inlet to produce an outlet speed of 50 m/sarrow_forward
- Prob6 conveyor belt discharges gravel into a barge as shown at a rate of 40 m³/min. If the gravel specific weight 18860 N/m³ 120 lbf, what is the tension in the hawser that secures the barge to the dock? Conveyor belt F-10 ft/s Hawser, Dock Gravel Barge Gravel 20⁰ +arrow_forwardWater (p = 1000 kg m3'H= 10-3 R) flows in a horizontal constant-area pipe; the pipe cross ms 1. section area of 0.1 m?. At the pipe inlet, a pump is installed and at the outlet, the pressure is atmospheric. Determine the pump power when the pipe length is 10 meter and a. When the velocity is 0.01 m/s b. When the velocity is 0.1 m/s and the pipe is smooth When the velocity is 0.1 m/s and the pipe equivalent roughness is 0.1 mm (you may use Moody chart here) d. When the pipe is smooth and vertical and the velocity is 0.1 m/s С.arrow_forwardAs shown in the figure, water enters and leaves a U-shaped piece of pipe in the horizontal plane.The total absolute pressure at the flange number (1) is 200 kPa, and a mass flow of 40 kg/s is entering the pipe.On the flange number (2), the total pressure is 150 kPa and there is a mass flow of 30 kg/s from the pipe.The mass flow rate of 4 kg/s from the section (3) and 6 kg/s from the section (4) is thrown into the atmosphere at a pressure of 100 kPa.Working with relative pressures;Determine the total forces Rx and Ry at the two flanges attached to the pipe. Note: Mass flow rate = Specific mass x Flow rate Flange, sealing of two machines or plumbing elementsgenerally standard for combiningIt is a construction element produced as Sections (1) and (2) are close enough to each other. For fluid entering and leaving the control volumeKinetic energy correction factor 1.035 and momentumThe flow correction coefficient is 1.025. Specific mass of water: ??? = 1000 ??/?3arrow_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
8.01x - Lect 27 - Fluid Mechanics, Hydrostatics, Pascal's Principle, Atmosph. Pressure; Author: Lectures by Walter Lewin. They will make you ♥ Physics.;https://www.youtube.com/watch?v=O_HQklhIlwQ;License: Standard YouTube License, CC-BY
Dynamics of Fluid Flow - Introduction; Author: Tutorials Point (India) Ltd.;https://www.youtube.com/watch?v=djx9jlkYAt4;License: Standard Youtube License