PROBLEM $2$

Thethermalinsulation is removedfromthe $1-m-$length section of a steampipe of outsidediameter $D=0\mathrm{.}2m$ and carryinghighpressure, hightemperaturesteam at $127$ C $.$ Air at $27$ C is

flowingacrosstheexposedsectionwithvelocity of $u_{}=5\frac{m}{s}.$ Deteminetheaverageheat transfer coefficientandthe rate of heatlossfromthel$-$m$-$length of exposedsection of thetubeintotheair.

$\frac{?}{\text{b}\text{a}\text{r}}(N)u_D=\frac{(\frac{?}{\text{b}\text{a}\text{r}}(h))D}{k}=CR{e}_D^{16}P{r}^{13}Pr0\mathrm{.}7$