Questions from Principles Of Heat Transfer


Q: Repeat Problem 5.54, parts (d), (e

Repeat Problem 5.54, parts (d), (e), (g), and (h) for x = 4.0 m and U( = 80 m/s, (a) taking the laminar boundary layer into account and (b) assuming that the turbulent boundary layer starts at the l...

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Q: Determine the rate of heat loss from the wall of a building

Determine the rate of heat loss from the wall of a building resulting from a 16 km/h wind blowing parallel to its surface. The wall is 24 m long and 6 m high, its surface temperature is 27°C, and the...

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Q: A furnace wall is to be constructed of brick having standard dimensions

A furnace wall is to be constructed of brick having standard dimensions of 22.5 cm 3 11 cm 3 7.5 cm Two kinds of material are available. One has a maximum usable temperature of 1040°C and a thermal co...

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Q: A small gray sphere having an emissivity of 0.5 and

A small gray sphere having an emissivity of 0.5 and a surface temperature of 537°C is located in a black- body enclosure having a temperature of 37°C. Calculate for this system (a) the net rate of he...

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Q: Water at a velocity of 2.5 m/s flows

Water at a velocity of 2.5 m/s flows parallel to a 1-m-long horizontal, smooth, and thin, flat plate. Determine the local thermal and hydrodynamic boundary layer thick- nesses and the local friction c...

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Q: The surface temperature of a thin, flat plate located parallel to

The surface temperature of a thin, flat plate located parallel to an air stream is 90°C. The free-stream velocity is 60 m/s, and the temperature of the air is 0°C. The plate is 60 cm wide and 45 cm lo...

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Q: An aluminum cooling fin for a heat exchanger is situated parallel to

An aluminum cooling fin for a heat exchanger is situated parallel to an atmospheric pressure air stream. The fin, as shown in the sketch, is 0.075 m high, 0.005 m thick and 0.45 m in the flow directio...

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Q: A fluid flows at 5 m/s over a wide,

A fluid flows at 5 m/s over a wide, flat plate 15 cm long. For each from the following list, calculate the Reynolds number at the downstream end of the plate. Indicate whether the flow at that point...

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Q: A 4-m2 square flat-plate solar collector for domestic

A 4-m2 square flat-plate solar collector for domestic hot-water heating is shown schematically. Solar radiation at a rate of 750 W/m2 is incident on the glass cover, which transmits 90% of the inciden...

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Q: A fluid at temperature T( is flowing at a velocity U

A fluid at temperature T( is flowing at a velocity U( over a flat plate that is at the same temperature as the fluid for a distance x0 from the leading edge but at a higher temperature Ts beyond this...

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