Cableizer ®

Distance cable—duct

Symbol
$\delta_{d}$
Unit
m
Formulas
$\frac{D_{di}}{2}-\frac{D_{o}}{2}$
Related
$D_{di}$
Inner diameter duct [m]
$D_{o}$
Outer diameter [m]
Used in
$\mathrm{Gr}_{gd}$
Grashof number gas—duct
$\mathrm{Gr}_{og}$
Grashof number cable—gas
$h_{conv,gd}$
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$^2$)]
$\mathrm{Nu}_{int}$
Nusselt number cable—riser
$\mathrm{Nu}_{og}$
Nusselt number cable—gas
$\mathrm{Ra}_{int}$
Rayleigh number gas→riser