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

$\dot{Q}_{cond}=0.0006 \times 1005 \times (20-32)=-1.806W$

lets first try to focus on

$Re_{D}=\frac{\rho V D}{\mu}=\frac{999.1 \times 3.5 \times 2}{1.138 \times 10^{-3}}=6.14 \times 10^{6}$ $\dot{Q}_{cond}=0