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

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.

$\dot{Q}=h \pi D L(T_{s}-T_{\infty})$

Solution:

Assuming $k=50W/mK$ for the wire material,

For a cylinder in crossflow, $C=0.26, m=0.6, n=0.35$ For a cylinder in crossflow

Assuming $\varepsilon=1$ and $T_{sur}=293K$,

Solution:

$\dot{Q}=10 \times \pi \times 0.08 \times 5 \times (150-20)=3719W$