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A spherical shell of wood with thermal conductivity of 0.13 W/m.K and an inner and outer...

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Mechanical Engineering

A spherical shell of wood with thermal conductivity of 0.13W/m.K and an inner and outer radius of 10 cm and 20 cm respectivelycontains a mixture of water and water vapor(100 C) inside the shellwhich is undergoing a phase change at atmospheric pressure. Theshell is suspended in a large room with an ambient air temperatureof 25 C Determine the temperature on the outer surface of thespherical shell and rate of heat loss from the fluid undergoingphase change. The thermal conductivity of air is 0.024 W/m.K Assumenegligible flow of air inside the room.

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