Cableizer
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Outer diameter of duct

Symbol
$D_{do}$
Unit
m
Formulae
$\frac{Do_d}{1000}$
Related
$Do_d$
Outer diameter of duct [mm]
Used in
$A_{do}$
Surface of duct outer wall [m$^2$]
$h_{conv,ext}$
Convection heat transfer coefficient, duct to air [W/(K.m$^2$)]
$\mathrm{Re}_{air}$
Reynolds number for air
$T_{4iii}$
Thermal resistance to ambient [K.m/W]
$W_{conv,ext}$
Convection heat transfer, duct to air [W/m]
$W_{de}$
Losses outside of riser/J-tube [W/m]
$W_{rad,ext}$
Radiation heat transfer, duct to air [W/m]