Solution Manual Heat And Mass Transfer Cengel 5th Edition Chapter 3 «Trusted • 2026»

The convective heat transfer coefficient is:

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

$h=\frac{Nu_{D}k}{D}=\frac{2152.5 \times 0.597}{2}=643.3W/m^{2}K$

$\dot{Q}=62.5 \times \pi \times 0.004 \times 2 \times (80-20)=100.53W$