A semi-infinite aluminum cylinder (k = 237 W/m · °C, α = 9.71 × 10–5 m2/s) of diameter D = 15 cm is initially at a uniform temperature of Ti= 115°C. The cylinder is now placed in water at 10°C, where heat transfer takes place by convection with a heat transfer coefficient of h = 140 W/m.2 · °C. Determine the temperature at the center of the cylinder 5 cm from the end surface 8 min after the start of cooling.
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