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MMLU-Pro / 12230 / A flat plate loses heat to the atmosphere by forced convection. Air at 70°F…

Problem

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question

A flat plate loses heat to the atmosphere by forced convection. Air at 70°F flows over the plate at the rate of 50 ft/sec. The plate is initially at 212°F. Find (a) the length of the laminar boundary layer thickness on the plate; (b) the local coefficient of heat transfer; (c) the thickness of the velocity boundary layer; and (d) the thickness of the thermal boundary layer. Also find (e) the average coefficient of heat transfer over the laminar region.

category

engineering

options

  1. (a) 2.1 ft, (b) 1.64 Btu/hr-ft^2-°F, (c) 0.0148 ft, (d) 0.0165 ft, (e) 3.28 Btu/hr-ft^2-°F
  2. (a) 1.9 ft, (b) 1.5 Btu/hr-ft^2-°F, (c) 0.015 ft, (d) 0.017 ft, (e) 3.5 Btu/hr-ft^2-°F
  3. (a) 2.6 ft, (b) 1.9 Btu/hr-ft^2-°F, (c) 0.019 ft, (d) 0.021 ft, (e) 3.80 Btu/hr-ft^2-°F
  4. (a) 1.7 ft, (b) 1.60 Btu/hr-ft^2-°F, (c) 0.012 ft, (d) 0.014 ft, (e) 3.30 Btu/hr-ft^2-°F
  5. (a) 2.2 ft, (b) 1.7 Btu/hr-ft^2-°F, (c) 0.017 ft, (d) 0.019 ft, (e) 3.6 Btu/hr-ft^2-°F
  6. (a) 2.4 ft, (b) 1.85 Btu/hr-ft^2-°F, (c) 0.020 ft, (d) 0.022 ft, (e) 3.75 Btu/hr-ft^2-°F
  7. (a) 2.0 ft, (b) 1.70 Btu/hr-ft^2-°F, (c) 0.016 ft, (d) 0.018 ft, (e) 3.40 Btu/hr-ft^2-°F
  8. (a) 2.3 ft, (b) 1.72 Btu/hr-ft^2-°F, (c) 0.018 ft, (d) 0.020 ft, (e) 3.60 Btu/hr-ft^2-°F
  9. (a) 2.5 ft, (b) 1.8 Btu/hr-ft^2-°F, (c) 0.016 ft, (d) 0.018 ft, (e) 3.7 Btu/hr-ft^2-°F
  10. (a) 1.8 ft, (b) 1.55 Btu/hr-ft^2-°F, (c) 0.013 ft, (d) 0.015 ft, (e) 3.45 Btu/hr-ft^2-°F

src

stemez-HeatTransfer

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Source and history

upstream_id / Original problem ID
12230
task_id
a18d6a38-dff2-5539-8058-5e161732c3b0
task_key
default--test--12230
task_revision_id
1
config / split
default / test

Official source

initial import