A spherical container of negligible thickness holding a hot fluid at 140 °C and having an outer diameter of 0.4 m is insulated with three layers of each 50 mm thick insulation of k, = 0.02: k2 - 0.06 and ka = 0.16 W/m "C respectively. (Starting from inside). The outside surface temperature is 30 °C. Interfaces k, k, T,TTT T ww T. www ww R3 R1 R2 Answer the following questions: (a) R, In °cw (b) R2 in °Cw (c) Rg in °Cw (d)Total Resistance in °Cw (e) The heat flow rate in Watt

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Mechanisms of heat transfer

Heat transfer is an essential discipline in thermal engineering that deals with the transfer, conversion, usability, and creation of heat or thermal energy. Transfer of heat occurs through various mechanisms like conduction, convection, radiation, and change of phases. All these mechanisms have distinct characteristics, but these mechanisms can simultaneously occur in an identical system.