Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN: 9781305387102
Author: Kreith, Frank; Manglik, Raj M.
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 5, Problem 5.30P
Air at 1000°C flows at an inlet velocity of 2
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Imagine a plate 0.1 m long by 0.1 m wide at a temperature of 80 °C.
Water is passed over its surface at a speed of 0.1 m/s and 40°C. Calculate the heat dissipated by the plate. Assume the following properties of water at 60 °C: k= 0.651 W/mK, Pr=3.02 y v = 0.478 x 10-6 m²/s.
Wind flows over a flat plate of length
L = 25 mm and width W = 8 mm. The
plate is maintained at a constant
temperature of 32 °C on both sides
using an electric heater generating
heat at a rate of Q = 0.5 W which is
dissipated to air from both sides of
the plate. Consider the temperature of
the wind/air as 20 °C and assume that
the wind speed does not exceed 100
m/s.
The properties of air at this
temperature are given as; specific
heat capacity Cp = 1.005 kJ/kg-K,
thermal conductivity k = 0.0253
W/m-K, Density p = 1.19 kg/m³, and
kinematic viscosity v = 1.522 x 10
5 m²/s.
Consider two different flows over geometrically similar airfoil shapes,one airfoil being twice the size of the other. The flow over the smallerairfoil has freestream properties given by T∞ = 200 K, ρ∞ = 1.23 kg/m3,and V∞ = 100 m/s. The flow over the larger airfoil is described byT∞ = 800 K, ρ∞ = 1.739 kg/m3, and V∞ = 200 m/s. Assume thatboth μ and a are proportional to T 1/2. Are the two flows dynamicallysimilar?
Chapter 5 Solutions
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
Ch. 5 - Evaluate the Reynolds number for flow over a tube...Ch. 5 - 5.2 Evaluate the Prandtl number from the following...Ch. 5 - Evaluate the Nusselt number for flow over a sphere...Ch. 5 - 5.4 Evaluate the Stanton number for flow over a...Ch. 5 - Evaluate the dimensionless groups hcD/k,UD/, and...Ch. 5 - 5.6 A fluid flows at 5 over a wide, flat plate 15...Ch. 5 - 5.7 The average Reynolds number for air passing in...Ch. 5 - Prob. 5.8PCh. 5 - When a sphere falls freely through a homogeneous...Ch. 5 - 5.10 Experiments have been performed on the...
Ch. 5 - 5.13 The torque due to the frictional resistance...Ch. 5 - The drag on an airplane wing in flight is known to...Ch. 5 - 5.19 Suppose that the graph below shows measured...Ch. 5 - Engine oil at 100C flows over and parallel to a...Ch. 5 - For flow over a slightly curved isothermal...Ch. 5 - Air at 20C flows at 1 m/s between two parallel...Ch. 5 - Air at 1000C flows at an inlet velocity of 2 m/s...Ch. 5 -
5.43 A refrigeration truck is traveling at 130...Ch. 5 - The air-conditioning system in a Chevrolet van for...Ch. 5 - Determine the rate of heat loss from the wall of a...
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
- Show that when laminar flow occurs with mean velocity um between extensive stationary flat plates the mean kinetic energy divided by mass of the fluid is 1.543 Um/2.arrow_forwardImagine a plate 1 m long by 1 m wide at a temperature of 80 °C. Water is passed over its surface at a speed of 1 m/s with a temperature of 40 °C.Calculate the heat dissipated by the plate. Assume the following properties of water at 60 °C: k=0.651 W/mK, Pr=3.02, v =0.478 x 10-6 m²/s.arrow_forwardAir at 20°C and 105PA enters the bottom of an 85° conical flow meter duct at a mass flow rate of 0.3 kg/s, as shown in the figure. It supports the centered conical body by steady annular flow around the cone and exits at the same velocity as it enters. Estimate the weight of the body in Newtonsarrow_forward
- You are conducting a series of flow experiments in order to investigate flow across a horizontal flat plate. When water at 51.9°C flows across a flat plate, the distance from the front edge of the plate to where the transition from laminar to turbulent flow occurs is determined to be 314mm. 1. What is the bulk velocity of the water flowing over the plate? 2. If the experiment is done with Refrigerant-22 instead of water and the same distance from the edge is measured, what would the bulk velocity be? 3. Compare the velocity and thermal boundary layer thickness at the laminar/turbulent transition point of the two cases above and comment on your finding. 4. Based on the average convective heat transfer coefficient up to the laminar/turbulent transition distance, which fluid would yield a higher heat transfer rate under the specified conditions?arrow_forwardProblem: Air at 25°C flows past a flat plate at 2.5m/s. the plate measures 60 cm X 30 cm and is maintained at a uniform temperature of 95°C. Calculate the heat loss from the plate if the air flows parallel to the 60 cm side. How would this heat loss be affected if the flow of air is made parallel to the 30 cm side. what is the percentage change.arrow_forwardCalculate the heat transfer from a 60 cm x 60 cm plate on which air flows at 40⁰C and. The plate temperature is 100⁰ C while the air speed is 5 m/s.Find the thickness of the boundary layer at a distance of x = 20 cm.arrow_forward
- Air is flowing at a speed of 30 m/sec over a flat plate. The air temperature is 20o C and its pressure is 1 atm. The plate is kept at a constant temperature of 65o C. What is the heat transfer rate per unit length between 7.5 cm to 30 cm, from the edge of the plate?arrow_forward7 Water at 15°C flows between two large parallel plates at a velocity of 1.5 m/s. The plates are separated by a distance of 15 mm. Estimate the distance from the leading edge where the flow becomes fully developed.arrow_forwarde- Water at 12 °C is to be heated to 60 °C by passing it over a bundle of 3-m-long, 2-cm-diameter resistance heater rods maintained at 95 °C. Water approaches the heater rod bundle in normal direction at a mean velocity of 1.2 m/s. The rods are arranged in-line with longitudinal and transverse pitches of SL = 4 cm and ST = 3 cm. Calculate the number of tube rows Ni in the flow direction needed to achieve the indicated temperature rise.arrow_forward
- Water at 25°C is flowing over a flat plate creating a turbulent boundary layer. A distance of 1 cm from the flat plate surface is marked with x. Determine the local velocity at x when the local shear stress is given to be 0.2N/m². Provide a simple justification on how you come up with your findings.arrow_forwardConsider an air solar collector that is 1 m wide and 11 m long and has a constant spacing of 3 cm between the glass cover and the collector plate. Air flows at an average temperature of 45\deg C at a rate of 0.12 m3/s through the 1m wide edge of the collector along the 11m long passageway. Disregarding the entrance and roughness effects and the 90 deg bend, determine the pressure drop in the collector. The properties of air at 1 atm and 45\deg are \rho = 1.109 kg/ m3, \mu 1.941 \times 10-5 kg/m's, and v 1.750 \times 10-5 m2/s.arrow_forwardThe forming section of a plastics plant puts out a continuous sheet of plastic that is 1.2 m wide and 2 mm thick at a rate of 18 m/min. The sheet is subjected to airflow at a velocity of 4 m/s on both top and bottom surfaces normal to the direction of motion of the sheet. The width of the air cooling section is such that a fixed point on the plastic sheet passes through that section in 2 s. Using properties of air at 1 atm and 60°C, determine the drag force the air exerts on the plastic sheet in the direction of airflow.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