Fundamentals of Heat and Mass Transfer
7th Edition
ISBN: 9780470917855
Author: Bergman, Theodore L./
Publisher: John Wiley & Sons Inc
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 6, Problem 6.33P
Consider conditions for which a fluid with a free stream velocity of
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Heat Transfer
Q1: In a process water at 30°C flows over a plate maintained at 10 °C with a
free stream velocity of 0.3 m/s. Determine the hydrodynamics boundary
layer thickness, thermal boundary layer thickness, local and average values
of heat transfer coefficient and refrigeration necessary to maintain the plate
temperature. Consider a plate of 1m x 1m size. At the film temperature the
property values are: Kinematic viscosity 1.006 x 106 m²/s, Thermal
conductivity =0.5978 W/m.K, Prandtl number=7.02.
=
The liquid food is flowed through an uninsulated pipe at 90 ° C. The product flow rate is 0.25 kg / s and has a density of 1000 kg / m³, a specific heat of 4 kJ / (kg K), a viscosity of 8 x 10-6 Pa s, and a thermal conductivity of 0.55 W / (m) K). Assume that the change in viscosity is negligible. The internal diameter of the pipe is 20 mm with a thickness of 3 mm made of stainless steel (k = 15 W / [m ° C]). The outside temperature is 15 ° C. If the outer convective heat transfer coefficient is 18 W / (m² K), calculate the heat loss at steady state per meter pipe length.
a. Find the convection coefficient in the pipe = Answer
W / m² ° C.
b. Calculate heat loss per meter pipe length = Answer
watt.
Chapter 6 Solutions
Fundamentals of Heat and Mass Transfer
Ch. 6 - The temperature distribution within a laminar...Ch. 6 - In flow over a surface, velocity and temperature...Ch. 6 - In a particular application involving airflow over...Ch. 6 - Water at a temperature of T=25C flows over one of...Ch. 6 - For laminar flow over a flat plate, the local heat...Ch. 6 - A flat plate is of planar dimension 1m0.75m. For...Ch. 6 - Parallel flow of atmospheric air over a flat plate...Ch. 6 - For laminar free convection from a heated vertical...Ch. 6 - A circular. hot gas jet at T is directed normal to...Ch. 6 - Experiments have been conducted to determine local...
Ch. 6 - A concentrating solar collector consists of a...Ch. 6 - Air at a free stream temperature of T=20C is in...Ch. 6 - The heat transfer rate per unit width (normal to...Ch. 6 - Experiments to determine the local convection heat...Ch. 6 - An experimental procedure for validating results...Ch. 6 - If laminar flow is induced at the surface of a...Ch. 6 - Consider the rotating disk of Problem 6.16. A...Ch. 6 - Consider airflow over a flat plate of length L=1m...Ch. 6 - A fan that can provide air speeds up to 50 m/s is...Ch. 6 - Consider the flow conditions of Example 6.4 for...Ch. 6 - Assuming a transition Reynolds number of 5105,...Ch. 6 - To a good approximation, the dynamic viscosity the...Ch. 6 - Prob. 6.23PCh. 6 - Consider a laminar boundary layer developing over...Ch. 6 - Consider a laminar boundary layer developing over...Ch. 6 - Experiments have shown that the transition from...Ch. 6 - An object of irregular shape has a characteristic...Ch. 6 - Experiments have shown that, for airflow at T=35C...Ch. 6 - Experimental measurements of the convection heat...Ch. 6 - To assess the efficacy of different liquids for...Ch. 6 - Gases are often used instead of liquids to cool...Ch. 6 - Experimental results for heat transfer over a flat...Ch. 6 - Consider conditions for which a fluid with a free...Ch. 6 - Consider the nanofluid of Example 2.2. Calculate...Ch. 6 - For flow over a flat plate of length L, the local...Ch. 6 - For laminar boundary layer flow over a flat plate...Ch. 6 - Sketch the variation of the velocity and thermal...Ch. 6 - Consider parallel flow over a flat plate for air...Ch. 6 - Forced air at T=25C and V=10m/s is used to cool...Ch. 6 - Consider the electronic elements that are cooled...Ch. 6 - Consider the chip on the circuit board of Problem...Ch. 6 - A major contributor to product defects in...Ch. 6 - A microscale detector monitors a steady flow...Ch. 6 - A thin, flat plate that is 0.2m0.2m on a side is...Ch. 6 - Atmospheric air is in parallel flow...Ch. 6 - Determine the drag force imparted to the top...Ch. 6 - For flow over a flat plate with an extremely rough...Ch. 6 - A thin, flat plate that is 0.2m0.2m on a side with...Ch. 6 - As a means of preventing ice formation on the...Ch. 6 - A circuit board with a dense distribution of...Ch. 6 - On a summer day the air temperature is 27C and the...Ch. 6 - It is observed that a 230-mm-diameter pan of water...Ch. 6 - The rate at which water is lost because of...Ch. 6 - Photosynthesis, as it occurs in the leaves of a...Ch. 6 - Species A is evaporating from a flat surface into...Ch. 6 - Prob. 6.57PCh. 6 - Prob. 6.58PCh. 6 - An object of irregular shape has a characteristic...Ch. 6 - Prob. 6.60PCh. 6 - An object of irregular shape 1 m long maintained...Ch. 6 - Prob. 6.62PCh. 6 - Prob. 6.63PCh. 6 - Prob. 6.64PCh. 6 - Prob. 6.65PCh. 6 - A streamlined strut supporting a bearing housing...Ch. 6 - Prob. 6.67PCh. 6 - Consider the conditions of Problem 6.7, for which...Ch. 6 - Using the naphthalene sublimation technique. the...Ch. 6 - Prob. 6.70PCh. 6 - Prob. 6.71PCh. 6 - Prob. 6.72PCh. 6 - Dry air at 32C flows over a wetted (water) plate...Ch. 6 - Dry air at 32C flows over a wetted plate of length...Ch. 6 - Prob. 6.75PCh. 6 - Prob. 6.76PCh. 6 - Prob. 6.77PCh. 6 - An expression for the actual water vapor partial...Ch. 6 - A mist cooler is used to provide relief for a...Ch. 6 - A wet-bulb thermometer consists of a...Ch. 6 - Prob. 6.81PCh. 6 - Prob. 6.83PCh. 6 - An experiment is conducted to determine the...Ch. 6 - Prob. 6.85PCh. 6 - Consider the control volume shown for the special...Ch. 6 - Prob. 6S.2PCh. 6 - Prob. 6S.3PCh. 6 - Consider two large (infinite) parallel plates, 5...Ch. 6 - Prob. 6S.5PCh. 6 - Consider Couette flow for which the moving plate...Ch. 6 - A shaft with a diameter of 100 mm rotates at 9000...Ch. 6 - Consider the problem of steady, incompressible...Ch. 6 - Prob. 6S.11PCh. 6 - A simple scheme for desalination involves...Ch. 6 - Consider the conservation equations (6S.24) and...
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
What is the difference between open-cell and closed-cell foamed plastics?
DeGarmo's Materials and Processes in Manufacturing
The beam supports the distributed load shown. Determine the resultant internal loadings on the cross section at...
Mechanics of Materials (10th Edition)
State whether the members are in tension or compression. Set P = 8 kN. Probs. 6-16/17
Engineering Mechanics: Statics
Tests on the established flow of six different liquids in smooth pipes of various sizes yield the following dat...
Fox and McDonald's Introduction to Fluid Mechanics
A piston/cylinder arrangement with a linear spring similar to Fig. P3.33 contains R-134a at 60 F, x=0.6 and a v...
Fundamentals Of Thermodynamics
ICA 2-1
For each of the following situations, indicate whether you think the action is ethical or unethical or ...
Thinking Like an Engineer: An Active Learning Approach (4th Edition)
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
- A large cone-shaped container (height H and radius R) is fed a liquid solution of density ρ at aconstant flow rate q0 . The solution evaporates from its top surface exposed to the sun.(a) Assuming that the rate of evaporation is proportional to the area of the surface with aconstant K (kg/m 2 .s), develop a differential equation for the variation with time of the level ofthe liquid in the container.(b) What should be the feed flow rate to maintain the fluid level constant once it reaches adesired value h*?(c) If the feed was zero, would the rate of change of the level of the fluid depend on the shapeof the cone-shaped container (H,R dimensions)arrow_forwardCold fluid flows at a velocity of 8 m/s over a hot flat plate. The flow is laminar, and the velocity and temperature profiles are assumed to be linear. The fluid properties are as follows: density ρ=1.14kg/m3, viscosity μ=18.2×10−6Pa s, specific heat capacity cp=1,008J/kgK, and thermal conductivity k=0.023W/mK. What is the thickness of the thermal boundary layer at the position x=2mm downstream of the leading edge? Give your numerical answer in mm to 1 decimal place.arrow_forwardAs a process engineer, you are designing a new drinking water treatment plant using conventional treatment process including Two Trains of Flocculators as follows: The design flow is 0.35 m³/s. The average temperature of water is 5°C with a dynamic viscosity, μ = 1.519 x 10-3 Pa.S and p = 999.967 kg/m³. The major target of the WTP is to remove color from water using alum as coagulant. GAvg 0 = 120,000. In each train of flocculators, it includes three same size compartments in series with the tappered velocity gradients G: 80, 50, and 20 Sec-¹. Length = Width = Depth for each Comparment. The type of impeller is axial-flow with three blades. The available impeller diameters are 1.0, 1.8 and 2.7 m. The water depth below the impeller, B = 1/3 H. H is the water depth in flocculator.arrow_forward
- A 2-cm diameter, 10-m long tube transports water at an average flow velocity of 8 m/s. The water enters at 20°C and leaves at 30°C. To compute for the Nusselt number of the water flow, what is the exact value of the temperature in °C on which the water properties should be based?arrow_forwardAn oil preheater consists of a single tube of 10 mm diameter and 30 m length. The first half of the tube is heated by a heat rate per unit length of q' = ax2 [W/m], where a = 5 W/m³, and the second half is well insulated. Before entering the tube, the oil has a uniform temperature of 25 °C and a flow rate of 0.0125 kg/s. The hydrodynamic boundary layer has been fully developed. (a) Determine the type of flow (laminar or turbulent) inside the tube. (b) Determine the location where the thermal boundary layer is fully developed. (c) Calculate the mean fluid temperature at the tube exit, Tmo. Properties of the oil: p = 865.8 kg/m³ = 2035 J/kg K, u = 8.36×102 N⚫s/m², k = 0.141 W/mK, a=0.8×107 m²/s, and Pr-1206.6.arrow_forwardSteam at 200 psia and 500°F flows at 100 fps in a 4 inches pipe inside diameter. What is the surface coefficient on the inside of the pipe if the thermal conductivity is 0.255 Btu-in/ft2-hr-°R, Cp = 0.559 Btu/lbs-°R, absolute viscousity is 1.2 x 10-5 lbs/ft-sec and specific volume is 2.725 ft3/lbs. Show your complete solution.arrow_forward
- Solve it correctly please. I will rate accordingly with 3votes.arrow_forwardi need the answer quicklyarrow_forwardAir at 20 C is flowing over a flat plate ( 6m long and 1.5m wide). The plate is maintained at 140 C. Find the heat loss from the plate if the air is flowing parallel to 6m side with a velocity of 2 m/s. What is the percentage change in heat transfer if the air flow is parallel to 1.5m side. The properties of air are: p=1.06 kg/m v 2.548x10 m/s, k=0.0295 W/mK and Pr-0.7. Nu =0.664Res Pr1 for laminar flow Nu, = (0.037RE-871)Pr for turbulent flowarrow_forward
- Air is flowing naturally over a cylinder of D=(15) cm. Air has thermal conductivity 0.027W/mK, kinematic viscosity 1.9*10-5 m2/s, Rayleigh number 108, and Prandtl number0.72. Find the Nusselt numberarrow_forwardIn secondsarrow_forwardA rod of diameter 0,08 m and length 0,13 m is inside a concentric cylindrical casing. The rod and its casing are vertically located. A liquid of density 900 kg/m3 and viscosity 0.9 Pa.s is used as a lubrication medium between rod and its casing. The rod is rotated at a speed of 46 rad/s. Due to the narrow clearance 0,03 m between rod and casing gravitational effects and surface curvature effects are ignored . Assume liquid flow in clearance as laminar steady and incompressible and use pi number, π = 3.14 a) What is the magnitude of shearing stress over the rod (in Pa)? b) What is the magnitude of frictional torque on rod (in N m)? c) What is the magnitude of Reynolds Number of flow ? Use clearence as dimensional characteristics in Reynolds Number calculationarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Heat Transfer (Activate Learning wi...Mechanical EngineeringISBN:9781305387102Author:Kreith, Frank; Manglik, Raj M.Publisher:Cengage Learning
Principles of Heat Transfer (Activate Learning wi...
Mechanical Engineering
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Cengage Learning
Heat Transfer – Conduction, Convection and Radiation; Author: NG Science;https://www.youtube.com/watch?v=Me60Ti0E_rY;License: Standard youtube license