Solution Manual Heat And Mass Transfer Cengel 5th Edition Chapter 3 -

The heat transfer from the not insulated pipe is given by:

$\dot{Q}=h A(T_{s}-T_{\infty})$

A 2-m-diameter and 4-m-long horizontal cylinder is maintained at a uniform temperature of 80°C. Water flows across the cylinder at 15°C with a velocity of 3.5 m/s. Determine the rate of heat transfer. The heat transfer from the not insulated pipe

$Nu_{D}=0.26 \times (6.14 \times 10^{6})^{0.6} \times (7.56)^{0.35}=2152.5$

The heat transfer from the wire can also be calculated by: The heat transfer from the not insulated pipe

$r_{o}+t=0.04+0.02=0.06m$

Assuming $\varepsilon=1$ and $T_{sur}=293K$, The heat transfer from the not insulated pipe

The convective heat transfer coefficient can be obtained from: