تم الحل ✓
categoryهندسة ميكانيكية
schoolبكالوريوس
event_available2026-07-14
السؤال
Transcribed Image Text:
1) Air at pressure of 1 atm and a temperature of 50°C is in
parallel flow over the top surface of a flat plate that is
heated to a uniform temperature of 100°C. The plate has a
length of 0.20 m (in the flow direction) and a width of 0.10
m. The Reynolds number based on the plate length is
40,000. What is the rate of heat transfer from the plate to
the air? If the free stream velocity of air is doubled and the
pressure is increased to 10 atm, what is the rate of heat
transfer?
Air properties at film temperature (75°C): k=0.0299
W/m.K, P=0.70
Use the following expressions for average Nusselt
number over a flat plate
Laminar flow:
Turbulent Flow
=0.664 (Re) Pr¹³
(0.037(Re)-871)Pr
Hint: Note Re, is the Reynolds number at x=L and Re
for flow over a flat plate=5X10
critical
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