A triangular duct whose surfaces are all black has a length of L=0.69 m. By considering the details given below, calculate the total heat transfer rate by radiation from the bottom surface (Surface-1) to the other surfaces (Surface-2 and Surface-3) of the duct, in W. 0=5.67×10*8 W/(m²K*) L=1.13 m, T1=606 K L2=0.62 m, T2=433 K L3=0.84 m, T3=340 K

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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.