Questions from Principles Of Heat Transfer


Q: The torque due to the frictional resistance of the oil film between

The torque due to the frictional resistance of the oil film between a rotating shaft and its bearing is found to be dependent on the force F normal to the shaft, the speed of rotation N of...

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Q: A series of tests in which water was heated while flowing through

A series of tests in which water was heated while flowing through a 1-m-long electrically heated tube of 1.3-cm ID yielded the experimental pressure-drop data shown next. Isothermal pressure-drop data...

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Q: The experimental data shown tabulated were obtained by passing n-butyl

The experimental data shown tabulated were obtained by passing n-butyl alcohol at a bulk temperature of 15°C over a heated flat plate 0.3-m long, 0.9-m wide, and with a surface temperature...

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Q: The test data tabulated on the next page were reduced from measurements

The test data tabulated on the next page were reduced from measurements made to determine the heat trans- fer coefficient inside tubes at Reynolds numbers only slightly above transition and at relativ...

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Q: A turbine blade with a characteristic length of 1 m is cooled

A turbine blade with a characteristic length of 1 m is cooled in an atmospheric pressure wind tunnel by air at 40°C with a velocity of 100 m/s. For a surface temperature of 500 K, the cooli...

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Q: The drag on an airplane wing in flight is known to be

The drag on an airplane wing in flight is known to be a function of the density of air () , the viscosity of air (() , the free-stream velocity (U() , a characteristic dimension of t...

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Q: Suppose that the graph below shows measured values of / for air

Suppose that the graph below shows measured values of / for air in forced convection over a cylinder of diameter D, plotted on a logarithmic graph of / as a function of ReD Pr. Write an appropriate di...

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Q: Evaluate the Prandtl number from the following data: /

Evaluate the Prandtl number from the following data: / kg/m s.

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Q: Repeat Problem 1.25 but assume that the surface of the

Repeat Problem 1.25 but assume that the surface of the storage vessel has an absorbance (equal to the emittance) of 0.1. Then determine the rate of evaporation of the liquid oxygen in kilograms per se...

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Q: When viscous dissipation is appreciable, conservation of energy [Eq.

When viscous dissipation is appreciable, conservation of energy [Eq. (5.6)] must take into account the rate at which mechanical energy is irreversibly converted to thermal energy due to viscous effect...

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