Cableizer ®

Inner diameter duct

Symbol
$D_{di}$
Unit
m
Formulas
$\frac{Di_{d}}{1000}$
Related
$Di_{d}$
Inner diameter duct [mm]
Used in
$A_{di}$
Duct surface (inner) [m$^2$]
$\delta_{d}$
Distance cable—duct [m]
$G_{od}$
Aspect ratio object/duct
$\mathrm{Gr}_{gd}$
Grashof number gas—duct
$h_{conv,gd}$
Heat transfer coefficient convection gas—duct [W/(K.m$^2$)]
$h_{conv,int}$
Heat transfer coefficient convection cable—riser [W/(K.m$^2$)]
$h_{conv,og}$
Heat transfer coefficient convection cable—gas [W/(K.m$^2$)]
$h_{rad,int}$
Heat transfer coefficient radiation cable—riser [W/(K.m$^2$)]
$K_{od}$
Diameter ratio object/duct
$\mathrm{Nu}_{int}$
Nusselt number cable—riser
$\mathrm{Nu}_{og}$
Nusselt number cable—gas
$W_{conv,gd}$
Convective heat transfer gas—duct [W/m]
$W_{di}$
Losses between cable and riser [W/m]
$\zeta_{er}$
Radiation shape factor touching cables