Cableizer
Log in

Convection heat transfer coefficient, gas to duct

Symbol
$h_{conv,gd}$
Unit
W/(K.m$^2$)
Formulae
$none$Riser closed at both ends (Hartlein & Black)
$none$Riser open at both ends (Hartlein & Black IIa)
$\frac{k_{gas} \mathrm{Nu}_{gd}}{L_d}$Riser open at both ends, 0.1 ≤ $Ra$ < 10^5 (Hartlein & Black IIb)
$\frac{k_{gas} \mathrm{Nu}_{gd}}{L_d}$Riser open at top and closed at bottom (Hartlein & Black)
$\frac{h_{conv,og} D_o}{D_{di}}$Riser closed at both ends (Anders)
$\frac{\left(\frac{0.6D_o}{D_{di}}+0.4\right) k_{gas} \mathrm{Nu}_{gd}}{\delta_d}$Riser open at both ends (Anders)
$\frac{k_{gas} \mathrm{Nu}_{gd}}{D_{di}}$Riser open at top and closed at bottom (Anders)
Related
$D_{di}$
Inner diameter of duct [m]
$D_o$
Outer diameter [m]
$\delta_d$
Distance between cable and duct [m]
$h_{conv,og}$
Convection heat transfer coefficient, object to gas [W/(K.m$^2$)]
$k_{gas}$
Thermal conductivity for gas [W/(m.K)]
$L_d$
Length of duct [m]
$\mathrm{Nu}_{gd}$
Nusselt number, gas to duct
Used in
$W_{conv,gd}$
Convection heat transfer, gas to duct [W/m]