Thermal resistance of the duct wall

Symbol
$T_{4ii}$
Unit
K.m/W
Formulae
$\frac{\rho_{d} \ln{\left(\frac{Do_{d}}{Di_{d}} \right)}}{2 \pi}$
Related
$Di_{d}$
Used in
$\Delta \theta_{c}$
$\theta_{de}$
$U_{wall}$
OHTC of pipe wall [W/(K.m$^2$)]