A hollow sphere is made up of two materials, first with k = 70 W/m K having an I.D. of 10 cm and O.D. of 30 cm and the second with k = 15 W/m K forms the outer layer with O.D. of 40 cm. The inside and outside temperature are 300°C and 30°C, respectively.
A hollow sphere is made up of two materials, first with k = 70 W/m K having an I.D. of 10 cm and O.D. of 30 cm and the second with k = 15 W/m K forms the outer layer with O.D. of 40 cm. The inside and outside temperature are 300°C and 30°C, respectively. Estimate the rate of flow through this sphere assuming perfect contact between two materials.
