Solutions for Fundamentals of Heat and Mass Transfer
Problem 6.1P:
The temperature distribution within a laminar thermal boundary layer associated with flow over an...Problem 6.3P:
In a particular application involving airflow over a heated surface, the boundary layer temperature...Problem 6.4P:
Water at a temperature of T=25C flows over one of the surfaces of a steel wall (AISI 1010) whose...Problem 6.5P:
For laminar flow over a flat plate, the local heat transfer coefficient hx is known to vary as x1/2,...Problem 6.6P:
A flat plate is of planar dimension 1m0.75m. For parallel laminar flow over the plate, calculate the...Problem 6.7P:
Parallel flow of atmospheric air over a flat plate of length L=3m is disrupted by an array of...Problem 6.8P:
For laminar free convection from a heated vertical surface, the local convection coefficient may be...Problem 6.9P:
A circular. hot gas jet at T is directed normal to a circular plate that has radius ro and is...Problem 6.10P:
Experiments have been conducted to determine local heat transfer coefficients for flow perpendicular...Problem 6.11P:
A concentrating solar collector consists of a parabolic reflector and a collector tube of diameter...Problem 6.12P:
Air at a free stream temperature of T=20C is in parallel flow over a flat plate of length L=5m and...Problem 6.13P:
The heat transfer rate per unit width (normal to the page) from a longitudinal section, x2x1, can be...Problem 6.14P:
Experiments to determine the local convection heat transfer coefficient for uniform flow normal to a...Problem 6.15P:
An experimental procedure for validating results of Problem 6.14 involves preheating a copper disk...Problem 6.16P:
If laminar flow is induced at the surface of a disk due to rotation about its axis, the local...Problem 6.17P:
Consider the rotating disk of Problem 6.16. A disk-shaped, stationary plate is placed a short...Problem 6.18P:
Consider airflow over a flat plate of length L=1m under conditions for which transition occurs at...Problem 6.19P:
A fan that can provide air speeds up to 50 m/s is to be used in a low-speed wind tunnel with...Problem 6.20P:
Consider the flow conditions of Example 6.4 for two situations, one in which the flow is completely...Problem 6.21P:
Assuming a transition Reynolds number of 5105, determine the distance from the leading edge of a...Problem 6.22P:
To a good approximation, the dynamic viscosity the thermal conductivity k, and the specific heat cp...Problem 6.24P:
Consider a laminar boundary layer developing over a flat plate. The flow is incompressible....Problem 6.25P:
Consider a laminar boundary layer developing over an isothermal flat plate. The flow is...Problem 6.26P:
Experiments have shown that the transition from laminar to turbulent conditions for flow normal to...Problem 6.27P:
An object of irregular shape has a characteristic length of L=1m and is maintained at a uniform...Problem 6.28P:
Experiments have shown that, for airflow at T=35C and V1=100m/s, the rate of heat transfer from a...Problem 6.29P:
Experimental measurements of the convection heat transfer coefficient for a square bar in cross flow...Problem 6.30P:
To assess the efficacy of different liquids for cooling an object of given size and shape by forced...Problem 6.31P:
Gases are often used instead of liquids to cool electronics in avionics applications because of...Problem 6.32P:
Experimental results for heat transfer over a flat plate with an extremely rough surface were found...Problem 6.33P:
Consider conditions for which a fluid with a free stream velocity of V=1m/s flows over a surface...Problem 6.34P:
Consider the nanofluid of Example 2.2. Calculate the Prandtl numbers of the base fluid and...Problem 6.35P:
For flow over a flat plate of length L, the local heat transfer coefficient hx is known to vary as...Problem 6.36P:
For laminar boundary layer flow over a flat plate with air at 20C and 1 atm, the thermal boundary...Problem 6.37P:
Sketch the variation of the velocity and thermal boundary layer thicknesses with distance from the...Problem 6.38P:
Consider parallel flow over a flat plate for air at 300 K and engine oil at 380 K. The free stream...Problem 6.39P:
Forced air at T=25C and V=10m/s is used to cool electronic elements on a circuit board. One such...Problem 6.40P:
Consider the electronic elements that are cooled by forced convection in Problem 6.39. The cooling...Problem 6.41P:
Consider the chip on the circuit board of Problem 6.39. To ensure reliable operation over extended...Problem 6.42P:
A major contributor to product defects in electronic modules relates to stresses induced during...Problem 6.44P:
A microscale detector monitors a steady flow (T=27C,V=10m/s) of air for the possible presence of...Problem 6.45P:
A thin, flat plate that is 0.2m0.2m on a side is oriented parallel to an atmospheric airstream...Problem 6.46P:
Atmospheric air is in parallel flow (u=15m/s,T=15C) over a flat heater surface that is to be...Problem 6.47P:
Determine the drag force imparted to the top surface of the flat plate of Example 6.4 for water...Problem 6.48P:
For flow over a flat plate with an extremely rough surface, convection heat transfer effects are...Problem 6.49P:
A thin, flat plate that is 0.2m0.2m on a side with rough top and bottom surfaces is placed in a wind...Problem 6.50P:
As a means of preventing ice formation on the wings of a small, private aircraft, it is proposed...Problem 6.51P:
A circuit board with a dense distribution of integrated circuits (ICs) and dimensions of 120mm120mm...Problem 6.52P:
On a summer day the air temperature is 27C and the relative humidity is 30. Water evaporates from...Problem 6.53P:
It is observed that a 230-mm-diameter pan of water at 23C has a mass loss rate of 1.5105kg/s when...Problem 6.54P:
The rate at which water is lost because of evaporation from the surface of a body of water may be...Problem 6.55P:
Photosynthesis, as it occurs in the leaves of a green plant, involves the transport of carbon...Problem 6.56P:
Species A is evaporating from a flat surface into species B. Assume that the concentration profile...Problem 6.59P:
An object of irregular shape has a characteristic length of L=1m and is maintained at a uniform...Problem 6.61P:
An object of irregular shape 1 m long maintained at a constant temperature of 100C is suspended in...Problem 6.66P:
A streamlined strut supporting a bearing housing is exposed to a hot airflow from an engine exhaust....Problem 6.68P:
Consider the conditions of Problem 6.7, for which a heat transfer experiment yielded the prescribed...Problem 6.69P:
Using the naphthalene sublimation technique. the radial distribution of the local convection mass...Problem 6.73P:
Dry air at 32C flows over a wetted (water) plate of 0.2m2 area. The average convection coefficient...Problem 6.74P:
Dry air at 32C flows over a wetted plate of length 200 mm and width 1 m (case A). An embedded...Problem 6.78P:
An expression for the actual water vapor partial pressure in terms of wet-bulb and dry-bulb...Problem 6.79P:
A mist cooler is used to provide relief for a fatigued athlete. Water at Ti=10C is injected as a...Problem 6.80P:
A wet-bulb thermometer consists of a mercury-in-glass thermometer covered with a wetted (water)...Problem 6.84P:
An experiment is conducted to determine the average mass transfer convection coefficient of a small...Problem 6S.1P:
Consider the control volume shown for the special case of steady-state conditions with v=0,T=T(y),...Problem 6S.4P:
Consider two large (infinite) parallel plates, 5 mm apart. One plate is stationary, while the other...Problem 6S.6P:
Consider Couette flow for which the moving plate is maintained at a uniform temperature and the...Problem 6S.8P:
A shaft with a diameter of 100 mm rotates at 9000 rpm in a journal bearing that is 70 mm long. A...Problem 6S.10P:
Consider the problem of steady, incompressible laminar flow between two stationary, infinite...Browse All Chapters of This Textbook
Chapter 1 - IntroductionChapter 2 - Introduction To ConductionChapter 3 - One-dimensional, Steady-state ConductionChapter 4 - Two-dimensional, Steady-state ConductionChapter 5 - Transient ConductionChapter 6 - Introduction To ConvectionChapter 7 - External FlowChapter 8 - Internal FlowChapter 9 - Free ConvectionChapter 10 - Boiling And Condensation
Book Details
Completely updated, the seventh edition provides engineers with an in-depth look at the key concepts in the field. It incorporates new discussions on emerging areas of heat transfer, discussing technologies that are related to nanotechnology, biomedical engineering and alternative energy. The example problems are also updated to better show how to apply the material. And as engineers follow the rigorous and systematic problem-solving methodology, they'll gain an appreciation for the richness and beauty of the discipline.
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