6-34 Liquid ammonia at 10°C and 1 atm flows across a horizontal cylinder at a velocity of 5 m/s. The cylinder has a diameter of 2.5 cm and length of 125 cm and is maintained at a temperature of 30°C. Calculate the heat lost by the cylinder.

Elements Of Electromagnetics
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6-34 Liquid ammonia at 10°C and 1 atm flows across a horizontal
cylinder at a velocity of 5 m/s. The cylinder has a diameter of 2.5 cm
and length of 125 cm and is maintained at a temperature of 30°C.
Calculate the heat lost by the cylinder.
6-65 Water flows over a 3-mm-diameter sphere at 5 m/s. The free-
stream temperature is 38°C, and the sphere is maintained at 93°C.
Calculate the heat-transfer rate.
6-95 A tube bank consists of a square array of 144 tubes arranged in an
in-line position. The tubes have a diameter of 1.5 cm and length of 1.0
m; the center-to-center tube spacing is 2.0 cm. If the surface temperature
of the tubes is maintained at 350 K and air enters the tube bank at 1 atm,
300 K, and u∞ = 6 m/s, calculate the total heat lost by the tubes.
Transcribed Image Text:6-34 Liquid ammonia at 10°C and 1 atm flows across a horizontal cylinder at a velocity of 5 m/s. The cylinder has a diameter of 2.5 cm and length of 125 cm and is maintained at a temperature of 30°C. Calculate the heat lost by the cylinder. 6-65 Water flows over a 3-mm-diameter sphere at 5 m/s. The free- stream temperature is 38°C, and the sphere is maintained at 93°C. Calculate the heat-transfer rate. 6-95 A tube bank consists of a square array of 144 tubes arranged in an in-line position. The tubes have a diameter of 1.5 cm and length of 1.0 m; the center-to-center tube spacing is 2.0 cm. If the surface temperature of the tubes is maintained at 350 K and air enters the tube bank at 1 atm, 300 K, and u∞ = 6 m/s, calculate the total heat lost by the tubes.
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