The convective heat transfer coefficient can be obtained from:
(c) Conduction:
The convective heat transfer coefficient for a cylinder can be obtained from: The convective heat transfer coefficient can be obtained
$\dot{Q}=10 \times \pi \times 0.004 \times 2 \times (80-20)=8.377W$
$\dot{Q}=62.5 \times \pi \times 0.004 \times 2 \times (80-20)=100.53W$ The convective heat transfer coefficient can be obtained
Assuming $h=10W/m^{2}K$,
Assuming $Nu_{D}=10$ for a cylinder in crossflow, The convective heat transfer coefficient can be obtained
$\dot{Q}_{rad}=1 \times 5.67 \times 10^{-8} \times 1.5 \times (305^{4}-293^{4})=41.9W$