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MMLU-Pro / 12121 / A flat plate is maintained at a constant temperature of 225°F (107.6°C). Air at…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

question

A flat plate is maintained at a constant temperature of 225°F (107.6°C). Air at 1 atm. and a temperature, T_\infty, of 140°F (60.3°C) moves across this plate at a velocity, U_\infty, of 2.5 ft/sec (0.762 m/sec). Calculate the local heat transfer coefficient,h_x, at 3 ft (0.91m) from the leading edge of the plate. Also determine the average heat transfer coefficient, h, from x = 0 to x = 3 ft. Ob-tain the total heat transfer rate from the plate to the air for the first 3 ft. of the plate per foot (\cong 0.3m) width of plate.

category

engineering

options

  1. h_x= 2.1 W/m^2-sec, h= 4.2 W/m^2-sec, Q = 52 W
  2. h_x= 1.65 W/m^2-sec, h= 3.3 W/m^2-sec, Q = 41.5 W
  3. h_x= 1.8 W/m^2-sec, h= 3.6 W/m^2-sec, Q = 46 W
  4. h_x= 2.0 W/m^2-sec, h= 4.0 W/m^2-sec, Q = 48 W
  5. h_x= 1.5 W/m^2-sec, h= 3.0 W/m^2-sec, Q = 40 W
  6. h_x= 2.2 W/m^2-sec, h= 4.5 W/m^2-sec, Q = 50 W
  7. h_x= 2.3 W/m^2-sec, h= 4.6 W/m^2-sec, Q = 55 W
  8. h_x= 1.9 W/m^2-sec, h= 3.8 W/m^2-sec, Q = 47 W
  9. h_x= 1.77 W/m^2-sec, h= 3.54 W/m^2-sec, Q = 45.7 W
  10. h_x= 1.6 W/m^2-sec, h= 3.2 W/m^2-sec, Q = 42 W

src

stemez-TransportPhenomena

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Source and history

upstream_id / Original problem ID
12121
task_id
f3125787-5274-5718-8f20-c5669a7c8e57
task_key
default--test--12121
task_revision_id
1
config / split
default / test

Official source

initial import