184
Analytical Heat Transfer
assume a thermally, fully developed condition, and write
down the simplified equations for momentum and energy and
the associated BCs that can be used for this problem.
c. Under the assumption in (b), determine the Nusselt number
on the plate.
8.12. Water at 43 ◦ C enters a 5-cm-ID pipe at a rate of 6 kg/s. If the pipe is
9 m long and maintained at 71 ◦ , calculate the exit water temperature and the total heat transfer. Assume that the Nusselt number of
the flow in the pipe is 3.657. Also, the thermal properties of water
are ρ = 1000 kg/m 3 , c p = 4.18 kJ/(kg K), and k = 0.6 W/(m K).
References
1. W. Rohsenow and H. Choi, Heat, Mass, and Momentum Transfer, Prentice-Hall, Inc.,
Englewood Cliffs, NJ, 1961.
2. F. Incropera and D. Dewitt, Fundamentals of Heat and Mass Transfer, Fifth Edition,
John Wiley & Sons, New York, NY, 2002.
3. W. M. Kays and M. E. Crawford, Convective Heat and Mass Transfer, Second
Edition, McGraw-Hill, New York, NY, 1980.
4. A. Mills, Heat Transfer, Richard D. Irwin, Inc., Boston, MA, 1992.
Analytical Heat Transfer
assume a thermally, fully developed condition, and write
down the simplified equations for momentum and energy and
the associated BCs that can be used for this problem.
c. Under the assumption in (b), determine the Nusselt number
on the plate.
8.12. Water at 43 ◦ C enters a 5-cm-ID pipe at a rate of 6 kg/s. If the pipe is
9 m long and maintained at 71 ◦ , calculate the exit water temperature and the total heat transfer. Assume that the Nusselt number of
the flow in the pipe is 3.657. Also, the thermal properties of water
are ρ = 1000 kg/m 3 , c p = 4.18 kJ/(kg K), and k = 0.6 W/(m K).
References
1. W. Rohsenow and H. Choi, Heat, Mass, and Momentum Transfer, Prentice-Hall, Inc.,
Englewood Cliffs, NJ, 1961.
2. F. Incropera and D. Dewitt, Fundamentals of Heat and Mass Transfer, Fifth Edition,
John Wiley & Sons, New York, NY, 2002.
3. W. M. Kays and M. E. Crawford, Convective Heat and Mass Transfer, Second
Edition, McGraw-Hill, New York, NY, 1980.
4. A. Mills, Heat Transfer, Richard D. Irwin, Inc., Boston, MA, 1992.