Consider a cubic block whose sides are 5 cm long and a cylindrical block whose height and diameter are also 5 cm Both blocks are initially at 20 deg C and are made of granite (k 2 5 W m middot K and Icirc plusmn 1 15 Atilde 10 6 m 2 s) Now both blocks are exposed to hot gases at 500 deg C in a furn...

A cubic block and a cylindrical block are exposed to hot gases on all of their surfaces The center t ...

Consider a cubic block whose sides are 5 cm long and a cylindrical block whose height and

Question:

Consider a cubic block whose sides are 5 cm long and a cylindrical block whose height and diameter are also 5 cm. Both blocks are initially at 20°C and are made of granite (k = 2.5 W/m·K and Î± = 1.15 Ã— 10^-6m²/s). Now both blocks are exposed to hot gases at 500°C in a furnace on all of their surfaces with a heat transfer coefficient of 40 W/m²·K. Determine the center temperature of each geometry after 10, 20, and 60 min.

5 cm 5 cm 5 cm T,= 20°C -5 cm- 5 cm T,= 20°C Hot gases, 500°C