A 25 cm x 25 cm circuit board uniformly dissipating 40 W of power is cooled by air, which approaches the circuit board a

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answerhappygod
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A 25 cm x 25 cm circuit board uniformly dissipating 40 W of power is cooled by air, which approaches the circuit board a

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A 25 cm x 25 cm circuit board uniformly dissipating 40 W ofpower is cooled by air, whichapproaches the circuit board at 15°C with a velocity of 4 m/s.Disregarding any heat transferfrom the back surface of the board, determine the surfacetemperature of the electroniccomponents at the end of the board. Assume the flow to be turbulentsince the electroniccomponents are expected to act as turbulators. Assume a filmtemperature of 30°C. Discuss thevalidity of assumptions made to solve this problem. How does theanalysis change if the filmtemperature was initially assumed to be 80°C?
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