An aluminum bar has a diameter of 11 cm and is initially uniform in temperature at 300C If it is suddenly exposed to a convection environment at 50C with h 1200 W m2 C, how long does it take the center temperature to cool to 80C Also calculate the heat loss per unit length ...

r 0 55 cm T i 300C T 50C h 1200 Wm 2 C T 0 ...

An aluminum bar has a diameter of 11 cm and is initially uniform in temperature at 300C.

Question:

An aluminum bar has a diameter of 11 cm and is initially uniform in temperature at 300ºC. If it is suddenly exposed to a convection environment at 50ºC with h = 1200 W/m2 · ºC, how long does it take the center temperature to cool to 80ºC? Also calculate the heat loss per unit length.