Thermal resistance by convection air-tunnel

Convection thermal resistance between air and inner wall of the tunnel.

Symbol
$T_{at}$
Unit
K.m/W
Formulae
$\frac{43.4782608695652}{\mathrm{Pr}_{air}^{0.4} \mathrm{Re}_{air}^{0.8} k_{air} \pi}$ventilated tunnel
$\frac{1}{2 \alpha_{at} \left(h_{t} + w_{t}\right)}$channel acc. Heinhold
Related
$\alpha_{at}$
$h_{t}$
$k_{air}$
$\mathrm{Pr}_{air}$
$\mathrm{Re}_{air}$
$w_{t}$
Used in
$T_{4iii}$