Outer diameter

Diameter in meters used to calculate the thermal resistance of cables, ducts or heat source in air or for calculations where metric dimension is required.

Symbol
$D_{o}$
Unit
m
Formulae
$\frac{D_{e}}{1000}$cables not in duct
$\frac{Do_{d}}{1000}$cables in duct
$\frac{do_{pipe}}{1000}$heat source
$\frac{d_{prot}}{1000}$GIL
Related
$D_{e}$
$do_{pipe}$
Used in
$\alpha_{sa}$
$\Delta \theta_{sun}$
$\mathrm{Gr}_{L}$
$\mathrm{Gr}_{prot}$
$r_{o}$
$\mathrm{Re}_{air}$
$W_{tube}$