-3-A piece of copper as shown in figure is initially at 150 C when suddenlyimmersed in an environment at 38 C. Determine the Biot number and findthe piece temperature after 1 minute,a) if the environment is water with h= 50 W/m2 Kb) if the environment is air with h= 12 W/m2 KData: k = 374 W/m K, c, 0.381 kJ/kg K, and p= 8938 kg/m3.Answ(a- Bi=0.0008913 ; T=136.1C b- Bi=0.0002139 ; T=146.5C).4 cm4 cm

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Answered: a) if the environment is water with h…

Engineering

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a) if the environment is water with h 50 W/m2 K b) if the environment is air with h= 12 W/m2 K

Elements Of Electromagnetics

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ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Concept explainers

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.

Question

-3-A piece of copper as shown in figure is initially at 150 C when suddenly
immersed in an environment at 38 C. Determine the Biot number and find
the piece temperature after 1 minute,
a) if the environment is water with h= 50 W/m2 K
b) if the environment is air with h= 12 W/m2 K
Data: k = 374 W/m K, c, 0.381 kJ/kg K, and p= 8938 kg/m3.
Answ(a- Bi=0.0008913 ; T=136.1C b- Bi=0.0002139 ; T=146.5C).
4 cm
4 cm

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