Diameter in meters used to calculate the thermal resistance of cables, ducts or heat source in air.

Symbol
$D_{\mathrm{o}}$
Unit
m
Formulae
 $\frac{D_{\mathrm{e}}}{1000}$ cables not in duct $\frac{Do_{\mathrm{d}}}{1000}$ cables in duct $\frac{D_{\mathrm{hs}}}{1000}$ heat source $D_{\mathrm{prot}}$ GIL
Related
$D_{\mathrm{e}}$
$D_{\mathrm{hs}}$
$D_{\mathrm{prot}}$
$Do_{\mathrm{d}}$
Used in
$\beta_{\mathrm{6}}$
$\beta_{\mathrm{t}}$
$\Delta \theta_{\mathrm{e_{\mathrm{t}}}}$
$\Delta \theta_{\mathrm{sun}}$
$F_{\mathrm{m}}$
$\gamma_{\mathrm{t}}$
$\mathrm{Gr}_{\mathrm{L}}$
$\mathrm{Gr}_{\mathrm{prot}}$
$h_{\mathrm{bs}}$
$h_{\mathrm{prot}}$
$K_{\mathrm{A}}$
$R_{\mathrm{q11}}$
$R_{\mathrm{q13}}$
$R_{\mathrm{q21}}$
$R_{\mathrm{q23}}$
$R_{\mathrm{q31}}$
$R_{\mathrm{q33}}$
$\mathrm{Re}_{\mathrm{air}}$
$T_{\mathrm{4iii}}$
$T_{\mathrm{sa}}$
$T_{\mathrm{st}}$
$W_{\mathrm{conv_{\mathrm{sa}}}}$
$W_{\mathrm{rad_{\mathrm{sa}}}}$