Air stream at 300K is moving at a velocity of 0.3m/s across a 100W electric bulb at 400K. If the bulb is approximated by a 60mm diameter sphere,calculate the heat transfer rate and the percentage of power lost owing to convection.
Physical properties of air: ν = 2.08 × 10 − 5 m 2 / s, κ = 0.03 W / m K, Pr=0.697.
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