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

However we are interested to solve problem from the begining

$\dot{Q}=\frac{423-293}{\frac{1}{2\pi \times 0.1 \times 5}ln(\frac{0.06}{0.04})}=19.1W$

$\dot{Q} {conv}=\dot{Q} {net}-\dot{Q} {rad}-\dot{Q} {evap}$ However we are interested to solve problem from

$Re_{D}=\frac{\rho V D}{\mu}=\frac{999.1 \times 3.5 \times 2}{1.138 \times 10^{-3}}=6.14 \times 10^{6}$

$Nu_{D}=CRe_{D}^{m}Pr^{n}$

The Nusselt number can be calculated by:

$\dot{Q}=62.5 \times \pi \times 0.004 \times 2 \times (80-20)=100.53W$ However we are interested to solve problem from

The heat transfer due to convection is given by: