Problem 2. (50 points) A sphere 60 mm in diameter is initially at 800 K. It is then quenched in a large bath having a co
Posted: Fri Mar 04, 2022 10:14 am
Problem 2. (50 points) A sphere 60 mm in diameter is initially at 800 K. It is then quenched in a large bath having a constant temperature of 320 K. The convection heat transfer coefficient is 1000 W/m2K, and the sphere properties are p = 2770 kg/ml, Cp = 8.75 kJ/kg-K, and k = 177 W/m-K. (a) Calculate the time required for the surface of the sphere to reach 415 K. (b) Determine the heat flux (W/m²) at the outer surface of the sphere at the time found in part (a).